发明授权
US4217337A Process for manufacturing an alumina substrate by acid purifying a
prefired substrate before final firing
失效
在最终烧制之前通过酸化预烧底物来制造氧化铝基底的方法
- 专利标题： Process for manufacturing an alumina substrate by acid purifying a prefired substrate before final firing
- 专利标题（中）： 在最终烧制之前通过酸化预烧底物来制造氧化铝基底的方法
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申请号： US955761申请日： 1978-10-30
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公开(公告)号： US4217337A公开(公告)日： 1980-08-12
- 发明人: Seiichi Yamada , Nobuo Kamehara , Kyohei Murakawa
- 申请人： Seiichi Yamada , Nobuo Kamehara , Kyohei Murakawa
- 申请人地址： JPX
- 专利权人： Fujitsu Limited
- 当前专利权人： Fujitsu Limited
- 当前专利权人地址： JPX
- 优先权： JPX52/129657 19771031
- 主分类号： C04B33/24
- IPC分类号： C04B33/24 ; C01F7/46 ; C04B33/26 ; C04B35/111 ; C04B41/53 ; C04B41/91 ; H01B3/12 ; H05K1/03 ; C01F7/02 ; C04B35/44
摘要：
Disclosed is an alumina substrate having a high density, a high degree of surface smoothness and excellent dielectric properties and a process for its manufacture. The process comprises prefiring a green sheet prepared from alumina powder at an elevated temperature, for example between 1200.degree. and 1350.degree. C., to remove combustible substances from the sheet, treating the resultant prefired substrate with an acid aqueous solution to eliminate acid-soluble and decomposable substances from the substrate, and firing the acid-treated substrate at an elevated temperature, for example between 1500.degree. and 1650.degree. C.
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