发明名称 |
Semiconductor ceramic and semiconductor ceramic device |
摘要 |
A semiconductor ceramic device comprises a body composed of a semiconductor ceramic having a positive resistance-temperature coefficient primarily composed of barium titanate and electrodes provided on the body, in which the resistance-temperature coefficient is 9%/° C. or more, resistivity is 3.5 ∩.cm or less, and withstand voltage is 50 V/mm or more. As the semiconductor ceramic forming the body provided in a thermistor having positive resistance-temperature characteristics, a semiconductor ceramic having a positive resistance-temperature coefficient is used, in which the semiconductor ceramic has an average particle diameter of about 7 to 12 mum and comprises barium titanate as a major component and sodium in an amount of about 70 ppm or less on a weight basis.
|
申请公布号 |
US6432558(B1) |
申请公布日期 |
2002.08.13 |
申请号 |
US20000634086 |
申请日期 |
2000.08.08 |
申请人 |
MURATA MANUFACTURING CO. LTD. |
发明人 |
NABIKA YASUHIRO;OKAMOTO TETSUKAZU;HIROTA TOSHIHARU;NAGAO YOSHITAKA |
分类号 |
C04B35/46;H01C7/02;(IPC1-7):C04B34/468;B32B15/04;H01L29/12 |
主分类号 |
C04B35/46 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|