发明名称 |
Method of preparing thermal insulation for high temperature microwave sintering operations |
摘要 |
Superior microwave transparent thermal insulations for high temperature microwave sintering operations were prepared. One embodiment of the thermal insulation comprises granules of boron nitride coated with a very thin layer of glassy carbon made by preparing a glassy carbon precursor and blending it with boron nitride powder to form a mixture. The blended mixture is granulated to form a grit which is dried and heated to form the granules of boron nitride coated with a glassy carbon. Alternatively, grains of glassy carbon are coated with boron nitride by blending a mixture of a slurry comprising boron nitride, boric acid binder, and methyl alcohol with glassy carbon grains to form a blended mixture. The blended mixture is dried to form grains of glassy carbon coated with boron nitride. In addition, a physical mixture of boron nitride powder and glassy carbon grains has also been shown to be an excellent thermal insulation material for microwave processing and sintering.
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申请公布号 |
US5536292(A) |
申请公布日期 |
1996.07.16 |
申请号 |
US19950518067 |
申请日期 |
1995.08.22 |
申请人 |
MARTIN MARIETTA ENERGY SYSTEMS, INC. |
发明人 |
HOLCOMBE, CRESSIE E.;DYKES, NORMAN L.;MORROW, MARVIN S. |
分类号 |
H05B6/80;(IPC1-7):C03C23/00 |
主分类号 |
H05B6/80 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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