发明名称 |
High-frequency porcelain compostion, process for producing the same and planar high-frequency circuit |
摘要 |
Sintering temperature can be lowered to 1,200° C. by adding from 15% by weight or more to 35% by weight or less of rutile-type titanium dioxide into forsterite. By carrying out sintering at such a low temperature, a sintered product can be obtained in which sintering was carried out while retaining the respective crystal phases of the forsterite and rutile-type titanium dioxide. Such a sintered product is an excellent high-frequency ceramic composition, wherein the high quality factor Q.f value derived from forsterite is hardly impaired, and, the absolute value of the temperature coefficient tau<SUB>f </SUB>is controlled to 30 ppm/° C. or less by rutile-type titanium dioxide.
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申请公布号 |
US2007027022(A1) |
申请公布日期 |
2007.02.01 |
申请号 |
US20050558375 |
申请日期 |
2005.11.29 |
申请人 |
TSUNOOKA TSUTOMU;OHSATO HITOSHI;SUGIYAMA TOMONORI |
发明人 |
TSUNOOKA TSUTOMU;OHSATO HITOSHI;SUGIYAMA TOMONORI |
分类号 |
C04B35/053;B28B3/00;B32B15/04;C04B35/04;C04B35/20;C04B35/465;C04B35/64;H01B3/12;H01G4/12 |
主分类号 |
C04B35/053 |
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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