发明名称 |
Alumina sintered body and method for manufacturing same, and spark plug comprising the alumina sintered body as an insulator |
摘要 |
An alumina sintered body comprises alumina crystals as a main phase and a grain boundary phase made up of crystalline Y2Si2O7 and amorphous SiO2 at grain boundaries of the alumina crystals wherein when the alumina sintered body is taken as 100 wt %, the high melting phase is present in the range of from 0.1 wt % to 15 wt %. There is also provided a method for preparing the alumina sintered body, which method comprising a first mixing step P1 of mixing, at least, a yttria powder having an average particle size of 60 to 100 nm and a silica powder having a given average particle size to provide a mixed slurry and a second mixing step of further mixing an alumina powder having an average particle size of 0.5 to 1.0 mum in the mixed slurry. |
申请公布号 |
US8431505(B2) |
申请公布日期 |
2013.04.30 |
申请号 |
US20100722175 |
申请日期 |
2010.03.11 |
申请人 |
OGATA ITSUHEI;SUZUKI HIROFUMI;ARAKI HIROSHI;AOI YASUKI;NIPPON SOKEN, INC.;DENSO CORPORATION |
发明人 |
OGATA ITSUHEI;SUZUKI HIROFUMI;ARAKI HIROSHI;AOI YASUKI |
分类号 |
C04B35/111;H01T13/20 |
主分类号 |
C04B35/111 |
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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