A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SEMICONDUCTOR CERAMIC COMPOSITION AND PTC THERMISTOR
PROBLEM TO BE SOLVED: To provide a semiconductor ceramic composition having Curie point shifted to higher temperature side than 120°C,, small in 25°C specific resistance and excellent in voltage resistance and mechanical strength and a PTC thermistor.SOLUTION: In a BaTiO-based semiconductor ceramic composition, a part of Ba is substituted by at least A (at least one kind selected from Na or K), Bi and RE (at least one kind selected from rare earth elements containing Y), at least a part of Ti is substituted by TM (at least one kind selected from V, Nb and Ta), 0.7≤{(Bi content)/(A content)}≤1.43, 0.017≤{(Bi content)+(A content)}≤0.25 and 0<(RE content+TM content)≤0.01 are satisfied when (Ti content+TM content) is 1 mol, crystal particle diameter has the maximum peak of a particle size distribution in a range of 1.1 to 4.0 μm and distribution frequency of the peak is 20% or more.SELECTED DRAWING: Figure 1
【課題】キュリー点を１２０℃より高温側にシフトさせ、２５℃比抵抗が小さく、かつ耐電圧および機械的強度の優れた半導体磁器組成物、およびＰＴＣサーミスタを提供する。【解決手段】ＢａＴｉＯ３系の半導体磁器組成物において、Ｂａの一部が少なくともＡ（ＮａまたはＫより選択される少なくとも１種）、Ｂｉ、およびＲＥ（Ｙを含む希土類元素より選択される少なくとも１種）で置換されており、かつＴｉの一部が少なくともＴＭ（Ｖ、ＮｂおよびＴａから選択される少なくとも１種）で置換されており（Ｔｉ含有量＋ＴＭ含有量）を１ｍｏｌとしたとき、０．７≦｛（Ｂｉ含有量）／（Ａ含有量）｝≦１．４３、０．０１７≦｛（Ｂｉ含有量）＋（Ａ含有量）｝≦０．２５、０＜（ＲＥ含有量＋ＴＭ含有量）≦０．０１を満足し、かつ結晶粒子径が１．１〜４．０μｍの範囲内に粒径分布の最大ピークを有し、該ピークの分布頻度が２０％以上とする。【選択図】図１
SEMICONDUCTOR CERAMIC COMPOSITION AND PTC THERMISTOR
PROBLEM TO BE SOLVED: To provide a semiconductor ceramic composition having Curie point shifted to higher temperature side than 120°C,, small in 25°C specific resistance and excellent in voltage resistance and mechanical strength and a PTC thermistor.SOLUTION: In a BaTiO-based semiconductor ceramic composition, a part of Ba is substituted by at least A (at least one kind selected from Na or K), Bi and RE (at least one kind selected from rare earth elements containing Y), at least a part of Ti is substituted by TM (at least one kind selected from V, Nb and Ta), 0.7≤{(Bi content)/(A content)}≤1.43, 0.017≤{(Bi content)+(A content)}≤0.25 and 0<(RE content+TM content)≤0.01 are satisfied when (Ti content+TM content) is 1 mol, crystal particle diameter has the maximum peak of a particle size distribution in a range of 1.1 to 4.0 μm and distribution frequency of the peak is 20% or more.SELECTED DRAWING: Figure 1
【課題】キュリー点を１２０℃より高温側にシフトさせ、２５℃比抵抗が小さく、かつ耐電圧および機械的強度の優れた半導体磁器組成物、およびＰＴＣサーミスタを提供する。【解決手段】ＢａＴｉＯ３系の半導体磁器組成物において、Ｂａの一部が少なくともＡ（ＮａまたはＫより選択される少なくとも１種）、Ｂｉ、およびＲＥ（Ｙを含む希土類元素より選択される少なくとも１種）で置換されており、かつＴｉの一部が少なくともＴＭ（Ｖ、ＮｂおよびＴａから選択される少なくとも１種）で置換されており（Ｔｉ含有量＋ＴＭ含有量）を１ｍｏｌとしたとき、０．７≦｛（Ｂｉ含有量）／（Ａ含有量）｝≦１．４３、０．０１７≦｛（Ｂｉ含有量）＋（Ａ含有量）｝≦０．２５、０＜（ＲＥ含有量＋ＴＭ含有量）≦０．０１を満足し、かつ結晶粒子径が１．１〜４．０μｍの範囲内に粒径分布の最大ピークを有し、該ピークの分布頻度が２０％以上とする。【選択図】図１
SEMICONDUCTOR CERAMIC COMPOSITION AND PTC THERMISTOR
半導体磁器組成物およびＰＴＣサーミスタ
ITO KAZUHIKO (author) / SHIMURA YOSHIKAZU (author) / FUJITA KAZUTAKA (author) / MORIKOSHI HIROKI (author) / TERADA TOMOHIRO (author)
2017-08-17
Patent
Electronic Resource
Japanese