JP5327553B2 - 半導体セラミック及び正特性サーミスタ - Google Patents
半導体セラミック及び正特性サーミスタ Download PDFInfo
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Description
ここで、M1は、Li、Na、Kに代表されるアルカリ金属元素を示している。また、Lnは半導体化剤となる希土類元素を示している。この希土類元素Lnとしては、半導体化剤としての作用を奏するものであれば、特に限定されるものではないが、Y、Sm、Nd、Dy、及びGdの群から選択された1種以上を好んで使用することができる。
0.02≦y≦0.12…(2)
2x+5y≦0.7 …(3)
すなわち、本実施の形態の組成範囲は、図1の斜線部で規定される。
ただし、nは、0.0001≦n≦0.0020である。
したがって、温度Tと電気抵抗率ρとの特性(以下、「ρ−T特性」という。)を測定し、その極大値と極小値とからPTC桁数を求めた。
2a、2b 外部電極
Claims (4)
- 実質的に鉛を含まない非鉛系の半導体セラミックであって、
一般式AmBO3で表されるペロブスカイト型構造を有するBaTiO3系組成物を主成分とし、
Aサイトを構成するBaの一部が、アルカリ金属元素、Bi、Ca、Sr及び希土類元素で置換されると共に、
前記Aサイトを構成する元素の総モル数を1モルとしたときの前記Ca及びSrの含有量は、前記Caのモル比をx、前記Srのモル比をyとした場合に、0.05≦x≦0.20、0.02≦y≦0.12、及び2x+5y≦0.7を満足し、
かつ、前記Aサイトを構成する元素の総モル数を1モルとしたときの前記アルカリ金属元素と前記Biの含有量の合計が、モル比換算で0.02〜0.20であり、
前記Aサイトを構成する元素の総モル数を1モルとしたときの前記希土類元素の含有量が、モル比換算で0.0005〜0.015であることを特徴とする半導体セラミック。 - 前記Caの含有量は、前記モル比xが、0.125≦x≦0.175であることを特徴とする請求項1記載の半導体セラミック。
- 前記アルカリ金属元素は、Na及びKのうちの少なくとも1種であることを特徴とする請求項1又は請求項2記載の半導体セラミック。
- 部品素体の両端部に外部電極が形成された正特性サーミスタにおいて、
前記部品素体が、請求項1乃至請求項3のいずれかに記載の半導体セラミックで形成されていることを特徴とする正特性サーミスタ。
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JP2010542134A JP5327553B2 (ja) | 2008-12-12 | 2009-12-11 | 半導体セラミック及び正特性サーミスタ |
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JP2008317473 | 2008-12-12 | ||
JP2008317473 | 2008-12-12 | ||
JP2010542134A JP5327553B2 (ja) | 2008-12-12 | 2009-12-11 | 半導体セラミック及び正特性サーミスタ |
PCT/JP2009/070757 WO2010067865A1 (ja) | 2008-12-12 | 2009-12-11 | 半導体セラミック及び正特性サーミスタ |
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JPWO2010067865A1 JPWO2010067865A1 (ja) | 2012-05-24 |
JP5327553B2 true JP5327553B2 (ja) | 2013-10-30 |
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EP (1) | EP2371788A4 (ja) |
JP (1) | JP5327553B2 (ja) |
KR (1) | KR101178971B1 (ja) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102021213863A1 (de) | 2021-01-15 | 2022-07-21 | Ngk Insulators, Ltd. | Keramikkörper und verfahren zu dessen herstellung, heizelement, heizeinheit, heizsystem sowie reinigungssytem |
DE102023106890A1 (de) | 2022-03-23 | 2023-09-28 | Ngk Insulators, Ltd. | Keramikkörper, wabenstruktur, verfahren zum herstellen eines keramikkörpers und heizelement |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2010067867A1 (ja) * | 2008-12-12 | 2010-06-17 | 株式会社 村田製作所 | 半導体セラミック及び正特性サーミスタ |
WO2010067868A1 (ja) * | 2008-12-12 | 2010-06-17 | 株式会社 村田製作所 | 半導体セラミック及び正特性サーミスタ |
WO2012036142A1 (ja) * | 2010-09-17 | 2012-03-22 | 株式会社 村田製作所 | 正特性サーミスタ及び正特性サーミスタの製造方法 |
CN103403814B (zh) * | 2011-02-24 | 2016-08-10 | 株式会社村田制作所 | 正特性热敏电阻元件 |
CN103459350B (zh) * | 2011-03-30 | 2016-01-06 | 株式会社村田制作所 | 半导体陶瓷及正温度系数热敏电阻 |
WO2014141814A1 (ja) * | 2013-03-11 | 2014-09-18 | Tdk株式会社 | Ptcサーミスタ磁器組成物およびptcサーミスタ素子 |
WO2015011948A1 (ja) * | 2013-07-26 | 2015-01-29 | 株式会社村田製作所 | 電子部品 |
EP3202747B1 (en) * | 2014-11-26 | 2020-12-23 | Murata Manufacturing Co., Ltd. | Barium titanate semiconductor ceramic, barium titanate semiconductor ceramic composition, and ptc thermistor for temperature detection |
JP2017143090A (ja) * | 2016-02-08 | 2017-08-17 | Tdk株式会社 | 半導体磁器組成物およびptcサーミスタ |
US10790075B2 (en) | 2018-04-17 | 2020-09-29 | Avx Corporation | Varistor for high temperature applications |
TWI740261B (zh) * | 2019-11-04 | 2021-09-21 | 興勤電子工業股份有限公司 | 陶瓷組成物之用途、陶瓷燒結體之用途及熱敏電阻器 |
CN114956804B (zh) * | 2022-06-23 | 2023-03-14 | 中国民航大学 | 一种钙钛矿型高熵陶瓷材料及其制备方法 |
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JPH05275203A (ja) * | 1992-03-25 | 1993-10-22 | Chichibu Cement Co Ltd | 半導体磁器組成物 |
JPH07187770A (ja) * | 1993-12-24 | 1995-07-25 | Sekisui Plastics Co Ltd | チタン酸バリウム系半導体磁器およびその製造方法 |
WO2008038538A1 (fr) * | 2006-09-28 | 2008-04-03 | Murata Manufacturing Co., Ltd. | Composition de porcelaine semiconductrice de titanate de baryum et dispositif ptc utilisant celle-ci |
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DE102021213863A1 (de) | 2021-01-15 | 2022-07-21 | Ngk Insulators, Ltd. | Keramikkörper und verfahren zu dessen herstellung, heizelement, heizeinheit, heizsystem sowie reinigungssytem |
DE102023106890A1 (de) | 2022-03-23 | 2023-09-28 | Ngk Insulators, Ltd. | Keramikkörper, wabenstruktur, verfahren zum herstellen eines keramikkörpers und heizelement |
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KR101178971B1 (ko) | 2012-08-31 |
JPWO2010067865A1 (ja) | 2012-05-24 |
CN102245535A (zh) | 2011-11-16 |
EP2371788A4 (en) | 2012-07-04 |
WO2010067865A1 (ja) | 2010-06-17 |
US8228161B2 (en) | 2012-07-24 |
US20110210815A1 (en) | 2011-09-01 |
KR20110083702A (ko) | 2011-07-20 |
EP2371788A1 (en) | 2011-10-05 |
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