HEXAGONAL BORON NITRIDE POWDER AND METHOD FOR PRODUCING THE SAME | Matter42 Literature
Patent
Atlas literature
Patent
US 12,637,356 B2
HEXAGONAL BORON NITRIDE POWDER AND METHOD FOR PRODUCING THE SAME
Tomoyuki Kakigi, Shota Daiki
Tokuyama Corporation, Shunan (JP)·May 26, 2026·US
Claims
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
1 independent · 4 dependent
1
Independenth-BN
A hexagonal boron nitride powder having a ratio (SW/SN) of a BET specific surface area (SW) measured using B₂ Comp. Ex. Comp. Ex. Comp. Ex. 3 4 44.7 18.8 21.1 0.81 0.62 0.77 3.3 0.0 0.0 138 6.8 5.2 227 18 46 0.27 0.17 0.26 2.73 1.55 2.43 0.10 0.11 0.11 Poor Poor Poor water as an adsorbed species to a BET specific surface area (SN) measured using nitrogen as an adsorbed species of 0.07 or less.
2
Dependent← claim 1h-BN
The hexagonal boron nitride powder according to claim 1, wherein an amount of eluted boron is 40 ppm or less, an amount of eluted sodium is 1 ppm or less, and an amount of eluted calcium is 50 ppm or less.
3
Dependent← claim 1h-BN
The hexagonal boron nitride powder according to claim 1, wherein an average particle size is 1 to 150 µm, and the BET specific surface area (SN) measured using nitrogen as the adsorbed species is 15 m2/g or less.
4
Dependent← claim 1h-BNresin
A resin composition comprising the hexagonal boron nitride powder according to claim 1 and a resin.
Materials
Materials described outside the worked examples.
hexagonal boron nitride powder
h-BN
Thermally Conductive Filler
Precursor For Heat Treatment
resin
Process steps
Additional fabrication and treatment steps described in the patent.
1
Heat Treatment
Step 1
Temperature
1300, 2200°C
Ambient
high-purity nitrogen atmosphere, dew point temperature −85° C. or lower
Reported properties
Performance values and ranges asserted in the specification or claims.
Property
Value
Material
SW/SN ratio (BET surface area water/nitrogen)
≤ 0.07 dimensionless
h-BN
amount of eluted boron
≤ 40 ppm
Cited prior art
Patents and literature cited by this patent (applicant and examiner references).
Cited patents · 18
US 10,919,767 B210,919,767 B2 2/2021 Daiki et al.
US 2014/0314652 A12014/0314652 A1 10/2014 Matsumoto et al.
US 2019/0225494 A12019/0225494 A1 7/2019 Daiki et al.
US 2021/0273295 A12021/0273295 A1 9/2021 Hatayama et al.
US 2023/0014886 A12023/0014886 A1 1/2023 Daiki et al.
CN 104024153 ACN 104024153 A 9/2014
CN 108795354 ACN 108795354 A 11/2018
Why these are connected
Related documents with shared materials, methods, properties, or citations.
HEXAGONAL BORON NITRIDE POWDER AND METHOD FOR PRODUCING THE SAME
Tomoyuki Kakigi, Shota Daiki
Tokuyama Corporation, Shunan (JP)·May 26, 2026·US
Claims
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
1 independent · 4 dependent
1
Independenth-BN
A hexagonal boron nitride powder having a ratio (SW/SN) of a BET specific surface area (SW) measured using B₂ Comp. Ex. Comp. Ex. Comp. Ex. 3 4 44.7 18.8 21.1 0.81 0.62 0.77 3.3 0.0 0.0 138 6.8 5.2 227 18 46 0.27 0.17 0.26 2.73 1.55 2.43 0.10 0.11 0.11 Poor Poor Poor water as an adsorbed species to a BET specific surface area (SN) measured using nitrogen as an adsorbed species of 0.07 or less.
2
Dependent← claim 1h-BN
The hexagonal boron nitride powder according to claim 1, wherein an amount of eluted boron is 40 ppm or less, an amount of eluted sodium is 1 ppm or less, and an amount of eluted calcium is 50 ppm or less.
3
Dependent← claim 1h-BN
The hexagonal boron nitride powder according to claim 1, wherein an average particle size is 1 to 150 µm, and the BET specific surface area (SN) measured using nitrogen as the adsorbed species is 15 m2/g or less.
4
Dependent← claim 1h-BNresin
A resin composition comprising the hexagonal boron nitride powder according to claim 1 and a resin.
Materials
Materials described outside the worked examples.
hexagonal boron nitride powder
h-BN
Thermally Conductive Filler
Precursor For Heat Treatment
resin
Process steps
Additional fabrication and treatment steps described in the patent.
1
Heat Treatment
Step 1
Temperature
1300, 2200°C
Ambient
high-purity nitrogen atmosphere, dew point temperature −85° C. or lower
Reported properties
Performance values and ranges asserted in the specification or claims.
Property
Value
Material
SW/SN ratio (BET surface area water/nitrogen)
≤ 0.07 dimensionless
h-BN
amount of eluted boron
≤ 40 ppm
Cited prior art
Patents and literature cited by this patent (applicant and examiner references).
Cited patents · 18
US 10,919,767 B210,919,767 B2 2/2021 Daiki et al.
US 2014/0314652 A12014/0314652 A1 10/2014 Matsumoto et al.
US 2019/0225494 A12019/0225494 A1 7/2019 Daiki et al.
US 2021/0273295 A12021/0273295 A1 9/2021 Hatayama et al.
US 2023/0014886 A12023/0014886 A1 1/2023 Daiki et al.
CN 104024153 ACN 104024153 A 9/2014
CN 108795354 ACN 108795354 A 11/2018
Why these are connected
Related documents with shared materials, methods, properties, or citations.
HEXAGONAL BORON NITRIDE POWDER AND METHOD FOR PRODUCING THE SAME
Tomoyuki Kakigi, Shota Daiki
Tokuyama Corporation, Shunan (JP)·May 26, 2026·US
Claims
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
1 independent · 4 dependent
1
Independenth-BN
A hexagonal boron nitride powder having a ratio (SW/SN) of a BET specific surface area (SW) measured using B₂ Comp. Ex. Comp. Ex. Comp. Ex. 3 4 44.7 18.8 21.1 0.81 0.62 0.77 3.3 0.0 0.0 138 6.8 5.2 227 18 46 0.27 0.17 0.26 2.73 1.55 2.43 0.10 0.11 0.11 Poor Poor Poor water as an adsorbed species to a BET specific surface area (SN) measured using nitrogen as an adsorbed species of 0.07 or less.
2
Dependent← claim 1h-BN
The hexagonal boron nitride powder according to claim 1, wherein an amount of eluted boron is 40 ppm or less, an amount of eluted sodium is 1 ppm or less, and an amount of eluted calcium is 50 ppm or less.
3
Dependent← claim 1h-BN
The hexagonal boron nitride powder according to claim 1, wherein an average particle size is 1 to 150 µm, and the BET specific surface area (SN) measured using nitrogen as the adsorbed species is 15 m2/g or less.
4
Dependent← claim 1h-BNresin
A resin composition comprising the hexagonal boron nitride powder according to claim 1 and a resin.
Materials
Materials described outside the worked examples.
hexagonal boron nitride powder
h-BN
Thermally Conductive Filler
Precursor For Heat Treatment
resin
Process steps
Additional fabrication and treatment steps described in the patent.
1
Heat Treatment
Step 1
Temperature
1300, 2200°C
Ambient
high-purity nitrogen atmosphere, dew point temperature −85° C. or lower
Reported properties
Performance values and ranges asserted in the specification or claims.
Property
Value
Material
SW/SN ratio (BET surface area water/nitrogen)
≤ 0.07 dimensionless
h-BN
amount of eluted boron
≤ 40 ppm
Cited prior art
Patents and literature cited by this patent (applicant and examiner references).
Cited patents · 18
US 10,919,767 B210,919,767 B2 2/2021 Daiki et al.
US 2014/0314652 A12014/0314652 A1 10/2014 Matsumoto et al.
US 2019/0225494 A12019/0225494 A1 7/2019 Daiki et al.
US 2021/0273295 A12021/0273295 A1 9/2021 Hatayama et al.
US 2023/0014886 A12023/0014886 A1 1/2023 Daiki et al.
CN 104024153 ACN 104024153 A 9/2014
CN 108795354 ACN 108795354 A 11/2018
Why these are connected
Related documents with shared materials, methods, properties, or citations.
HEXAGONAL BORON NITRIDE POWDER AND METHOD FOR PRODUCING THE SAME
Tomoyuki Kakigi, Shota Daiki
Tokuyama Corporation, Shunan (JP)·May 26, 2026·US
Claims
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
1 independent · 4 dependent
1
Independenth-BN
A hexagonal boron nitride powder having a ratio (SW/SN) of a BET specific surface area (SW) measured using B₂ Comp. Ex. Comp. Ex. Comp. Ex. 3 4 44.7 18.8 21.1 0.81 0.62 0.77 3.3 0.0 0.0 138 6.8 5.2 227 18 46 0.27 0.17 0.26 2.73 1.55 2.43 0.10 0.11 0.11 Poor Poor Poor water as an adsorbed species to a BET specific surface area (SN) measured using nitrogen as an adsorbed species of 0.07 or less.
2
Dependent← claim 1h-BN
The hexagonal boron nitride powder according to claim 1, wherein an amount of eluted boron is 40 ppm or less, an amount of eluted sodium is 1 ppm or less, and an amount of eluted calcium is 50 ppm or less.
3
Dependent← claim 1h-BN
The hexagonal boron nitride powder according to claim 1, wherein an average particle size is 1 to 150 µm, and the BET specific surface area (SN) measured using nitrogen as the adsorbed species is 15 m2/g or less.
4
Dependent← claim 1h-BNresin
A resin composition comprising the hexagonal boron nitride powder according to claim 1 and a resin.
Materials
Materials described outside the worked examples.
hexagonal boron nitride powder
h-BN
Thermally Conductive Filler
Precursor For Heat Treatment
resin
Process steps
Additional fabrication and treatment steps described in the patent.
1
Heat Treatment
Step 1
Temperature
1300, 2200°C
Ambient
high-purity nitrogen atmosphere, dew point temperature −85° C. or lower
Reported properties
Performance values and ranges asserted in the specification or claims.
Property
Value
Material
SW/SN ratio (BET surface area water/nitrogen)
≤ 0.07 dimensionless
h-BN
amount of eluted boron
≤ 40 ppm
Cited prior art
Patents and literature cited by this patent (applicant and examiner references).
Cited patents · 18
US 10,919,767 B210,919,767 B2 2/2021 Daiki et al.
US 2014/0314652 A12014/0314652 A1 10/2014 Matsumoto et al.
US 2019/0225494 A12019/0225494 A1 7/2019 Daiki et al.
US 2021/0273295 A12021/0273295 A1 9/2021 Hatayama et al.
US 2023/0014886 A12023/0014886 A1 1/2023 Daiki et al.
CN 104024153 ACN 104024153 A 9/2014
CN 108795354 ACN 108795354 A 11/2018
Why these are connected
Related documents with shared materials, methods, properties, or citations.
