Matsushita Electric Industrial Co., Ltd.

Takuoki Hata

Takayuki Kuroda

Masayuki Takahashi

Yoshihiro Matsuo

Hiroki Moriwake

Yasushi Goto

Akira Ohmi

Eiichi Koga

Tadayoshi Ushijima

Yoko Sakoda

A positive temperature coefficient thermistor formed of a principal ingredient comprising barium titanate, lead titanate and calcium titanate, and rare earth elements, being particularly characterized by using calcium titanate as a raw material and having the particle diameter of said calcium titanate among raw material powders made smaller than that of other raw materials. The positive temperature coefficient thermistor formed by the present invention has improved durability in a reducing atmosphere due an increased density of the crystal structure.

Positive temperature coefficient thermistor and fabrication method

A temperature sensor includes a thermistor in a heat-resistant cap and lead wires electrically connected to the thermistor. The thermistor is comprised of materials defined by the following chemical formula:

Temperature sensor and its manufacturing method

Oxide semiconductor for thermistor and manufacturing method thereof

Oxide semiconductor for thermistor

Ceramic high dielectric composition

Oxide thermistor compositions which comprise 100 atomic % of at least four kinds of cations which are (1) Mn ion, (2) Ni ion, (3) at least one kind of ion selected from the group consisting of Cu, Fe, and Cr, and (4) one kind of ion selected from the group consisting of Cr, Zr, and Li. These compositions have lower resistivity with higher B-constant and exhibit a high stability of resistance.

Oxide thermistor compositions

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Moriguchi, Japan

Takuoki Hata