METHOD FOR PRODUCING CERAMIC FOR HEAT-RADIATING MEMBERS, CERAMIC FOR HEAT-RADIATING MEMBERS, AND SOLAR CELL MODULE AND LED LIGHT-EMITTING MODULE USING SAID CERAMIC
First Claim
1. A process for producing a ceramic for a heat-radiating member, comprising:
- providing as a raw material an alumina powder having an alumina (Al2O3) content of at least 99.5 mass % and an average particle size of from 0.2 to 1 μ
m,granulating the powder into a form of granules ranging from 50 to 100 μ
m,pressing the raw material which has been obtained during the granulating and which includes granular alumina to form a green compact, andheating the green compact in an air atmosphere at a firing temperature of from 1,480 to 1,600°
C. to obtain a sintered body.
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Accused Products
Abstract
Provided is a process for producing a ceramic for a heat-radiating member. The process includes providing as a raw material an alumina powder having an alumina (Al2O3) content of at least 99.5 mass % and an average particle size of from 0.2 to 1 μm, and granulating the powder into a granular form ranging from 50 to 100 μm, pressing the raw material which has been obtained in the granulation step and which includes granular alumina, and heating a green compact in an air atmosphere at a firing temperature of from 1,480 to 1,600° C. to obtain a sintered body. Also provided is a process for producing a ceramic for a heat-radiating member, the ceramic being a sintered alumina body which has high thermal conductivity, efficient heat dissipation, excellent mechanical strength and thermal shock resistance and which is usable for cooling applications at heat generating areas of electronic devices and equipment.
13 Citations
14 Claims
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1. A process for producing a ceramic for a heat-radiating member, comprising:
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providing as a raw material an alumina powder having an alumina (Al2O3) content of at least 99.5 mass % and an average particle size of from 0.2 to 1 μ
m,granulating the powder into a form of granules ranging from 50 to 100 μ
m,pressing the raw material which has been obtained during the granulating and which includes granular alumina to form a green compact, and heating the green compact in an air atmosphere at a firing temperature of from 1,480 to 1,600°
C. to obtain a sintered body. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A ceramic for a heat-radiating member, comprising a sintered alumina body having an alumina (Al2O3) content of at least 99.5 mass % and a silica (SiO2) content of at most 0.1 mass %, having crystal grain sizes of from 1 to 10 μ
- m, containing crystal grains in a range of from 30 to 55 grains in an area of 30×
20 μ
m, and having a thermal conductivity of at least 33 W/m·
K. - View Dependent Claims (9, 10, 11, 12, 13, 14)
- m, containing crystal grains in a range of from 30 to 55 grains in an area of 30×
Specification