发明名称 |
Processo do estado sólido para conversao de um corpo cerâmico policristalino denso a um corpo monocristalino bem como copo monocristalino e corpo de safira |
摘要 |
A solid state process for the bulk conversion of a dense polycrystalline ceramic body to a single crystal body has been accomplished by heating the polycrystalline material to a temperature above one-half of the melting temperature of the material but below the melting point of the material. As the process is a solid state process, no melting of the ceramic body is necessary to convert it to a single crystal. The process has been used to convert a dense polycrystalline alumina body (PCA) containing less than 100 wppm of magnesia to sapphire (single crystal alumina) by heating the PCA to temperatures above 1100 DEG C but below 2050 DEG C, the melting point of alumina. <IMAGE> |
申请公布号 |
BR9403826(A) |
申请公布日期 |
1995.06.06 |
申请号 |
BR19949403826 |
申请日期 |
1994.09.23 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
CURTIS EDWARD SCOTT;LIONEL MONTY LEVINSON;RANDOLPH E. MAXWELL;MARY SUE KALISZEWSKI |
分类号 |
C04B35/115;C30B1/02;C30B1/04;C30B1/10;C30B29/20;(IPC1-7):C04B35/10 |
主分类号 |
C04B35/115 |
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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