Patent
US 10,781,352of Invention
Yuki OTSUKA
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 10,781,352Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
: A hexagonal boron nitride powder (D) comprising an aggregate of primary particles of hexagonal boron nitride, wherein the powder (D) has a primary particle size of less than 10 p m, a ratio of an average longer diameter (L i) to an average thickness (di) of the primary particles, [L i/di], of 5.0 or more and 20 or less, a BET specific surface area of less than 10 m 2/g, and a bulk density of 0.75 g/cm 3 or more, wherein the average longer diameter (L i) is a number average value of the longer diameters of the primary particles, the longer diameter being the maximum diameter in a planar direction of the primary particle of the powder (D) and the average thickness (di) is a number average value of the thickness of the primary particles of the powder (D), and the powder (D) has one maximum peak in a range of a particle size of 45 p m or more and 150 p m or less in a particle size distribution curve of the hexagonal boron nitride powder classified to have a particle size of 45 p m or more and 106 p m or less, and has a decrease rate of the maximum peak of 10 % or more and less than 40 % when a dispersion liquid obtained by dispersing the hexagonal boron nitride powder (D) in water is subjected to an ultrasonic treatment for 1 minute, the peak decrease rate being calculated by the following expression (1): AM ENDMENT UNDER 37 C.F.R. § 1.111 Attorney Docket No.: Q₂₃₆₂₅₇ Peak decrease rate (%) =[[(maximum peak height before ultrasonic treatment (a))-(maximum peak height after ultrasonic treatment (b))]/(maximum peak height before ultrasonic treatment (a)) } x 100 (1). Currently amended
: The hexagonal boron nitride powder (D) as claimed in claim 1, having a BET specific surface area of 1.5 m 2/g or more and 6.0 m 2/g or less. Currently amended
: The hexagonal boron nitride powder (D) as claimed in claim 1, having a BET specific surface area of 1.5 m 2/g or more and 5.0 m 2/g or less. Currently amended
: The hexagonal boron nitride powder (D) as claimed in claim 1, having a crystallite size of 260 A or more and 1000 A or less. Currently amended
: A resin composition comprising 10 % by volume or more and 90 % by volume or less of the hexagonal boron nitride powder (D) as claimed in claim 1. Currently amended
: A method for producing the hexagonal boron nitride powder (D) as claimed in claim 1, the method comprising a step of mixing 100 parts by mass of AM ENDMENT UNDER 37 C.F.R. § 1.111 Attorney Docket No.: Q₂₃₆₂₅₇ a mixed powder comprising 50 % by mass or more and % by mass or less of a boron nitride fine powder (A) and 10% by mass or more and 50% by mass or less of a boron compound (B) represented by a formula (B₂₀₃)-(H₂₀)x wherein X = 0 to 3, and 1.0 part by mass or more and 15 parts by mass or less in terms of carbon of a carbon source (C), molding a resultant mixture, and then firing a resultant under an atmosphere comprising a nitrogen gas, wherein the boron nitride fine powder (A) has a ratio of an average longer diameter (L 2) to an average thickness (d 2) of primary particles thereof, [L 2/d 2], of 2.0 or more and 15 or less, a 50 % volume cumulative particle size D s o of 0.20 p m or more and 5.0 p m or less, a BET specific surface area of 5.0 m 2/g or more and 30 m 2/g or less, and a crystallite size of 150 A or more and 400 A or less, wherein the average longer diameter (L 2) is a number average value of the longer diameters of the primary particles of the powder (D) and the average thickness (d 2) is a number average value of the thicknesses of the primary particles of the powder (D). Currently amended
. Canceled
Layer stacks claimed or described, ordered top of device to substrate.
resin sheet
Materials described outside the worked examples.
hexagonal boron nitride powder (D)
BN
resin
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
durability, softness, and flexibility of the thermally conductive member. Among these, at least one resin selected from the group consisting of various thermosetting resins, thermoplastic resins, rubber, and thermoplastic elastomers, and the like which are used
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
primary particle size of hBN powder (D) | ≤ 10 μm | BN |
ratio of average longer diameter (L1) to average thickness (d1) of primary particles [L1/d1] of hBN powder (D) | 5–20 dimensionless |
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HEXAGONAL BORON NITRIDE POWDER AND METHOD FOR PRODUCING THE SAME, AND COMPOSITION AND HEAT DISSIPATION MATERIAL USING THE SAME
HEXAGONAL BORON NITRIDE POWDER AND METHOD FOR PRODUCING THE SAME, AND COMPOSITION AND HEAT DISSIPATION MATERIAL USING THE SAME
Patent
Atlas literature
Patent
US 10,781,352Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
: A hexagonal boron nitride powder (D) comprising an aggregate of primary particles of hexagonal boron nitride, wherein the powder (D) has a primary particle size of less than 10 p m, a ratio of an average longer diameter (L i) to an average thickness (di) of the primary particles, [L i/di], of 5.0 or more and 20 or less, a BET specific surface area of less than 10 m 2/g, and a bulk density of 0.75 g/cm 3 or more, wherein the average longer diameter (L i) is a number average value of the longer diameters of the primary particles, the longer diameter being the maximum diameter in a planar direction of the primary particle of the powder (D) and the average thickness (di) is a number average value of the thickness of the primary particles of the powder (D), and the powder (D) has one maximum peak in a range of a particle size of 45 p m or more and 150 p m or less in a particle size distribution curve of the hexagonal boron nitride powder classified to have a particle size of 45 p m or more and 106 p m or less, and has a decrease rate of the maximum peak of 10 % or more and less than 40 % when a dispersion liquid obtained by dispersing the hexagonal boron nitride powder (D) in water is subjected to an ultrasonic treatment for 1 minute, the peak decrease rate being calculated by the following expression (1): AM ENDMENT UNDER 37 C.F.R. § 1.111 Attorney Docket No.: Q₂₃₆₂₅₇ Peak decrease rate (%) =[[(maximum peak height before ultrasonic treatment (a))-(maximum peak height after ultrasonic treatment (b))]/(maximum peak height before ultrasonic treatment (a)) } x 100 (1). Currently amended
: The hexagonal boron nitride powder (D) as claimed in claim 1, having a BET specific surface area of 1.5 m 2/g or more and 6.0 m 2/g or less. Currently amended
: The hexagonal boron nitride powder (D) as claimed in claim 1, having a BET specific surface area of 1.5 m 2/g or more and 5.0 m 2/g or less. Currently amended
: The hexagonal boron nitride powder (D) as claimed in claim 1, having a crystallite size of 260 A or more and 1000 A or less. Currently amended
: A resin composition comprising 10 % by volume or more and 90 % by volume or less of the hexagonal boron nitride powder (D) as claimed in claim 1. Currently amended
: A method for producing the hexagonal boron nitride powder (D) as claimed in claim 1, the method comprising a step of mixing 100 parts by mass of AM ENDMENT UNDER 37 C.F.R. § 1.111 Attorney Docket No.: Q₂₃₆₂₅₇ a mixed powder comprising 50 % by mass or more and % by mass or less of a boron nitride fine powder (A) and 10% by mass or more and 50% by mass or less of a boron compound (B) represented by a formula (B₂₀₃)-(H₂₀)x wherein X = 0 to 3, and 1.0 part by mass or more and 15 parts by mass or less in terms of carbon of a carbon source (C), molding a resultant mixture, and then firing a resultant under an atmosphere comprising a nitrogen gas, wherein the boron nitride fine powder (A) has a ratio of an average longer diameter (L 2) to an average thickness (d 2) of primary particles thereof, [L 2/d 2], of 2.0 or more and 15 or less, a 50 % volume cumulative particle size D s o of 0.20 p m or more and 5.0 p m or less, a BET specific surface area of 5.0 m 2/g or more and 30 m 2/g or less, and a crystallite size of 150 A or more and 400 A or less, wherein the average longer diameter (L 2) is a number average value of the longer diameters of the primary particles of the powder (D) and the average thickness (d 2) is a number average value of the thicknesses of the primary particles of the powder (D). Currently amended
. Canceled
Layer stacks claimed or described, ordered top of device to substrate.
resin sheet
Materials described outside the worked examples.
hexagonal boron nitride powder (D)
BN
resin
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
durability, softness, and flexibility of the thermally conductive member. Among these, at least one resin selected from the group consisting of various thermosetting resins, thermoplastic resins, rubber, and thermoplastic elastomers, and the like which are used
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
primary particle size of hBN powder (D) | ≤ 10 μm | BN |
ratio of average longer diameter (L1) to average thickness (d1) of primary particles [L1/d1] of hBN powder (D) | 5–20 dimensionless |
Related documents with shared materials, methods, properties, or citations.
HEXAGONAL BORON NITRIDE POWDER AND METHOD FOR PRODUCING THE SAME, AND COMPOSITION AND HEAT DISSIPATION MATERIAL USING THE SAME
HEXAGONAL BORON NITRIDE POWDER AND METHOD FOR PRODUCING THE SAME, AND COMPOSITION AND HEAT DISSIPATION MATERIAL USING THE SAME
Patent
Atlas literature
Patent
US 10,781,352Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
: A hexagonal boron nitride powder (D) comprising an aggregate of primary particles of hexagonal boron nitride, wherein the powder (D) has a primary particle size of less than 10 p m, a ratio of an average longer diameter (L i) to an average thickness (di) of the primary particles, [L i/di], of 5.0 or more and 20 or less, a BET specific surface area of less than 10 m 2/g, and a bulk density of 0.75 g/cm 3 or more, wherein the average longer diameter (L i) is a number average value of the longer diameters of the primary particles, the longer diameter being the maximum diameter in a planar direction of the primary particle of the powder (D) and the average thickness (di) is a number average value of the thickness of the primary particles of the powder (D), and the powder (D) has one maximum peak in a range of a particle size of 45 p m or more and 150 p m or less in a particle size distribution curve of the hexagonal boron nitride powder classified to have a particle size of 45 p m or more and 106 p m or less, and has a decrease rate of the maximum peak of 10 % or more and less than 40 % when a dispersion liquid obtained by dispersing the hexagonal boron nitride powder (D) in water is subjected to an ultrasonic treatment for 1 minute, the peak decrease rate being calculated by the following expression (1): AM ENDMENT UNDER 37 C.F.R. § 1.111 Attorney Docket No.: Q₂₃₆₂₅₇ Peak decrease rate (%) =[[(maximum peak height before ultrasonic treatment (a))-(maximum peak height after ultrasonic treatment (b))]/(maximum peak height before ultrasonic treatment (a)) } x 100 (1). Currently amended
: The hexagonal boron nitride powder (D) as claimed in claim 1, having a BET specific surface area of 1.5 m 2/g or more and 6.0 m 2/g or less. Currently amended
: The hexagonal boron nitride powder (D) as claimed in claim 1, having a BET specific surface area of 1.5 m 2/g or more and 5.0 m 2/g or less. Currently amended
: The hexagonal boron nitride powder (D) as claimed in claim 1, having a crystallite size of 260 A or more and 1000 A or less. Currently amended
: A resin composition comprising 10 % by volume or more and 90 % by volume or less of the hexagonal boron nitride powder (D) as claimed in claim 1. Currently amended
: A method for producing the hexagonal boron nitride powder (D) as claimed in claim 1, the method comprising a step of mixing 100 parts by mass of AM ENDMENT UNDER 37 C.F.R. § 1.111 Attorney Docket No.: Q₂₃₆₂₅₇ a mixed powder comprising 50 % by mass or more and % by mass or less of a boron nitride fine powder (A) and 10% by mass or more and 50% by mass or less of a boron compound (B) represented by a formula (B₂₀₃)-(H₂₀)x wherein X = 0 to 3, and 1.0 part by mass or more and 15 parts by mass or less in terms of carbon of a carbon source (C), molding a resultant mixture, and then firing a resultant under an atmosphere comprising a nitrogen gas, wherein the boron nitride fine powder (A) has a ratio of an average longer diameter (L 2) to an average thickness (d 2) of primary particles thereof, [L 2/d 2], of 2.0 or more and 15 or less, a 50 % volume cumulative particle size D s o of 0.20 p m or more and 5.0 p m or less, a BET specific surface area of 5.0 m 2/g or more and 30 m 2/g or less, and a crystallite size of 150 A or more and 400 A or less, wherein the average longer diameter (L 2) is a number average value of the longer diameters of the primary particles of the powder (D) and the average thickness (d 2) is a number average value of the thicknesses of the primary particles of the powder (D). Currently amended
. Canceled
Layer stacks claimed or described, ordered top of device to substrate.
resin sheet
Materials described outside the worked examples.
hexagonal boron nitride powder (D)
BN
resin
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
durability, softness, and flexibility of the thermally conductive member. Among these, at least one resin selected from the group consisting of various thermosetting resins, thermoplastic resins, rubber, and thermoplastic elastomers, and the like which are used
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
primary particle size of hBN powder (D) | ≤ 10 μm | BN |
ratio of average longer diameter (L1) to average thickness (d1) of primary particles [L1/d1] of hBN powder (D) | 5–20 dimensionless |
Related documents with shared materials, methods, properties, or citations.
HEXAGONAL BORON NITRIDE POWDER AND METHOD FOR PRODUCING THE SAME, AND COMPOSITION AND HEAT DISSIPATION MATERIAL USING THE SAME
HEXAGONAL BORON NITRIDE POWDER AND METHOD FOR PRODUCING THE SAME, AND COMPOSITION AND HEAT DISSIPATION MATERIAL USING THE SAME
Patent
Atlas literature
Patent
US 10,781,352Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
: A hexagonal boron nitride powder (D) comprising an aggregate of primary particles of hexagonal boron nitride, wherein the powder (D) has a primary particle size of less than 10 p m, a ratio of an average longer diameter (L i) to an average thickness (di) of the primary particles, [L i/di], of 5.0 or more and 20 or less, a BET specific surface area of less than 10 m 2/g, and a bulk density of 0.75 g/cm 3 or more, wherein the average longer diameter (L i) is a number average value of the longer diameters of the primary particles, the longer diameter being the maximum diameter in a planar direction of the primary particle of the powder (D) and the average thickness (di) is a number average value of the thickness of the primary particles of the powder (D), and the powder (D) has one maximum peak in a range of a particle size of 45 p m or more and 150 p m or less in a particle size distribution curve of the hexagonal boron nitride powder classified to have a particle size of 45 p m or more and 106 p m or less, and has a decrease rate of the maximum peak of 10 % or more and less than 40 % when a dispersion liquid obtained by dispersing the hexagonal boron nitride powder (D) in water is subjected to an ultrasonic treatment for 1 minute, the peak decrease rate being calculated by the following expression (1): AM ENDMENT UNDER 37 C.F.R. § 1.111 Attorney Docket No.: Q₂₃₆₂₅₇ Peak decrease rate (%) =[[(maximum peak height before ultrasonic treatment (a))-(maximum peak height after ultrasonic treatment (b))]/(maximum peak height before ultrasonic treatment (a)) } x 100 (1). Currently amended
: The hexagonal boron nitride powder (D) as claimed in claim 1, having a BET specific surface area of 1.5 m 2/g or more and 6.0 m 2/g or less. Currently amended
: The hexagonal boron nitride powder (D) as claimed in claim 1, having a BET specific surface area of 1.5 m 2/g or more and 5.0 m 2/g or less. Currently amended
: The hexagonal boron nitride powder (D) as claimed in claim 1, having a crystallite size of 260 A or more and 1000 A or less. Currently amended
: A resin composition comprising 10 % by volume or more and 90 % by volume or less of the hexagonal boron nitride powder (D) as claimed in claim 1. Currently amended
: A method for producing the hexagonal boron nitride powder (D) as claimed in claim 1, the method comprising a step of mixing 100 parts by mass of AM ENDMENT UNDER 37 C.F.R. § 1.111 Attorney Docket No.: Q₂₃₆₂₅₇ a mixed powder comprising 50 % by mass or more and % by mass or less of a boron nitride fine powder (A) and 10% by mass or more and 50% by mass or less of a boron compound (B) represented by a formula (B₂₀₃)-(H₂₀)x wherein X = 0 to 3, and 1.0 part by mass or more and 15 parts by mass or less in terms of carbon of a carbon source (C), molding a resultant mixture, and then firing a resultant under an atmosphere comprising a nitrogen gas, wherein the boron nitride fine powder (A) has a ratio of an average longer diameter (L 2) to an average thickness (d 2) of primary particles thereof, [L 2/d 2], of 2.0 or more and 15 or less, a 50 % volume cumulative particle size D s o of 0.20 p m or more and 5.0 p m or less, a BET specific surface area of 5.0 m 2/g or more and 30 m 2/g or less, and a crystallite size of 150 A or more and 400 A or less, wherein the average longer diameter (L 2) is a number average value of the longer diameters of the primary particles of the powder (D) and the average thickness (d 2) is a number average value of the thicknesses of the primary particles of the powder (D). Currently amended
. Canceled
Layer stacks claimed or described, ordered top of device to substrate.
resin sheet
Materials described outside the worked examples.
hexagonal boron nitride powder (D)
BN
resin
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
durability, softness, and flexibility of the thermally conductive member. Among these, at least one resin selected from the group consisting of various thermosetting resins, thermoplastic resins, rubber, and thermoplastic elastomers, and the like which are used
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
primary particle size of hBN powder (D) | ≤ 10 μm | BN |
ratio of average longer diameter (L1) to average thickness (d1) of primary particles [L1/d1] of hBN powder (D) | 5–20 dimensionless |
Related documents with shared materials, methods, properties, or citations.
HEXAGONAL BORON NITRIDE POWDER AND METHOD FOR PRODUCING THE SAME, AND COMPOSITION AND HEAT DISSIPATION MATERIAL USING THE SAME
HEXAGONAL BORON NITRIDE POWDER AND METHOD FOR PRODUCING THE SAME, AND COMPOSITION AND HEAT DISSIPATION MATERIAL USING THE SAME
boron compound (B)
(B₂O₃)·(H₂O)x, x=0 to 3
carbon source (C)
graphite
C
boron carbide
B₄C
BN |
BET specific surface area of hBN powder (D) | ≤ 10 m2/g | BN |
bulk density of hBN powder (D) | ≥ 0.75 g/cm3 | BN |
BET specific surface area of hBN powder (D) — claim 2 range | 1.5–6 m2/g | BN |
BET specific surface area of hBN powder (D) — claim 3 range | 1.5–5 m2/g | BN |
crystallite size of hBN powder (D) — claim 4 range | 260–1000 Å | BN |
ratio of average longer diameter (L2) to average thickness (d2) of primary particles [L2/d2] of boron nitride fine powder (A) | 2–15 dimensionless | BN |
50% volume cumulative particle size D50 of boron nitride fine powder (A) | 0.2–5 μm | BN |
BET specific surface area of boron nitride fine powder (A) | 5–30 m2/g | BN |
crystallite size of boron nitride fine powder (A) | 150–400 Å | BN |
50% volume cumulative particle size D50 of boron nitride fine powder (A) — claim 9 range | 0.2–1 μm | BN |
BET specific surface area of boron nitride fine powder (A) — claim 10 range | 5–20 m2/g | BN |
crystallite size of boron nitride fine powder (A) — claim 11 range | 200–400 Å | BN |
Duration | 20–90 minutes | — |
Duration | 50–70 minutes | — |
Pressure | 0.4–5 pa | — |
RUGGED HEXAGONAL BORON NITRIDE SOLID STATE DETECTOR
boron compound (B)
(B₂O₃)·(H₂O)x, x=0 to 3
carbon source (C)
graphite
C
boron carbide
B₄C
BN |
BET specific surface area of hBN powder (D) | ≤ 10 m2/g | BN |
bulk density of hBN powder (D) | ≥ 0.75 g/cm3 | BN |
BET specific surface area of hBN powder (D) — claim 2 range | 1.5–6 m2/g | BN |
BET specific surface area of hBN powder (D) — claim 3 range | 1.5–5 m2/g | BN |
crystallite size of hBN powder (D) — claim 4 range | 260–1000 Å | BN |
ratio of average longer diameter (L2) to average thickness (d2) of primary particles [L2/d2] of boron nitride fine powder (A) | 2–15 dimensionless | BN |
50% volume cumulative particle size D50 of boron nitride fine powder (A) | 0.2–5 μm | BN |
BET specific surface area of boron nitride fine powder (A) | 5–30 m2/g | BN |
crystallite size of boron nitride fine powder (A) | 150–400 Å | BN |
50% volume cumulative particle size D50 of boron nitride fine powder (A) — claim 9 range | 0.2–1 μm | BN |
BET specific surface area of boron nitride fine powder (A) — claim 10 range | 5–20 m2/g | BN |
crystallite size of boron nitride fine powder (A) — claim 11 range | 200–400 Å | BN |
Duration | 20–90 minutes | — |
Duration | 50–70 minutes | — |
Pressure | 0.4–5 pa | — |
RUGGED HEXAGONAL BORON NITRIDE SOLID STATE DETECTOR
boron compound (B)
(B₂O₃)·(H₂O)x, x=0 to 3
carbon source (C)
graphite
C
boron carbide
B₄C
BN |
BET specific surface area of hBN powder (D) | ≤ 10 m2/g | BN |
bulk density of hBN powder (D) | ≥ 0.75 g/cm3 | BN |
BET specific surface area of hBN powder (D) — claim 2 range | 1.5–6 m2/g | BN |
BET specific surface area of hBN powder (D) — claim 3 range | 1.5–5 m2/g | BN |
crystallite size of hBN powder (D) — claim 4 range | 260–1000 Å | BN |
ratio of average longer diameter (L2) to average thickness (d2) of primary particles [L2/d2] of boron nitride fine powder (A) | 2–15 dimensionless | BN |
50% volume cumulative particle size D50 of boron nitride fine powder (A) | 0.2–5 μm | BN |
BET specific surface area of boron nitride fine powder (A) | 5–30 m2/g | BN |
crystallite size of boron nitride fine powder (A) | 150–400 Å | BN |
50% volume cumulative particle size D50 of boron nitride fine powder (A) — claim 9 range | 0.2–1 μm | BN |
BET specific surface area of boron nitride fine powder (A) — claim 10 range | 5–20 m2/g | BN |
crystallite size of boron nitride fine powder (A) — claim 11 range | 200–400 Å | BN |
Duration | 20–90 minutes | — |
Duration | 50–70 minutes | — |
Pressure | 0.4–5 pa | — |
RUGGED HEXAGONAL BORON NITRIDE SOLID STATE DETECTOR
boron compound (B)
(B₂O₃)·(H₂O)x, x=0 to 3
carbon source (C)
graphite
C
boron carbide
B₄C
BN |
BET specific surface area of hBN powder (D) | ≤ 10 m2/g | BN |
bulk density of hBN powder (D) | ≥ 0.75 g/cm3 | BN |
BET specific surface area of hBN powder (D) — claim 2 range | 1.5–6 m2/g | BN |
BET specific surface area of hBN powder (D) — claim 3 range | 1.5–5 m2/g | BN |
crystallite size of hBN powder (D) — claim 4 range | 260–1000 Å | BN |
ratio of average longer diameter (L2) to average thickness (d2) of primary particles [L2/d2] of boron nitride fine powder (A) | 2–15 dimensionless | BN |
50% volume cumulative particle size D50 of boron nitride fine powder (A) | 0.2–5 μm | BN |
BET specific surface area of boron nitride fine powder (A) | 5–30 m2/g | BN |
crystallite size of boron nitride fine powder (A) | 150–400 Å | BN |
50% volume cumulative particle size D50 of boron nitride fine powder (A) — claim 9 range | 0.2–1 μm | BN |
BET specific surface area of boron nitride fine powder (A) — claim 10 range | 5–20 m2/g | BN |
crystallite size of boron nitride fine powder (A) — claim 11 range | 200–400 Å | BN |
Duration | 20–90 minutes | — |
Duration | 50–70 minutes | — |
Pressure | 0.4–5 pa | — |