Sakai Chemical Industry Co., Ltd.

Matsushita Electric Works, Ltd.

Masashi Aoki

Kazunobu Abe

Kazuhisa Hidaka

Kiyotaka Komori

Kiyoshi Fukai

Tadashi Takenaka

Hiroaki Rikimaru

Seishiro Yamakawa

Michimasa Tsuzaki

Akiyoshi Nozue

Satoshi Fujiki

Koichiro Sakata

Takeshi Ito

Kayoko Segawa

A multilayer piezoelectric composite comprising a bonded laminate each layer of which is composed of a green sheet of a low-temperature sintering lead zirconate titanate piezoelectric ceramic. The temperature coefficient of a frequency constant of at least one layer has a polarity opposite to the polarity of those of the other layers. The bonded laminate is sintered at a temperature which does not produce any or almost any interdiffusion between layers so that the absolute value of the temperature coefficient of a frequency constant of the bonded laminate is smaller than the absolute value of the temperature coefficient of a frequency constant of any or one of the layers.

Method of making a multilayer piezoelectric composite

A composite dielectric is formed with a matrix synthetic resin and particulate porous, inorganic dielectric dispersed in the matrix synthetic resin. The dielectric constant of this composite dielectric can be thereby elevated effectively without enlarging the dissipation factor (tan .delta.) of the composite dielectric.

Composite dielectric and printed-circuit use substrate utilizing the same

A composition for producing ceramic dielectrics which comprises: a mixture of barium titanate which has average particle size of 0.1-1.5 .mu.m is amounts of 98-60 mole % and a perovskite type barium titanate solid solution which has average particle size of 0.1-1.5 .mu.m and a Curie temperature of 50.degree.-115.degree. C. in amounts of 2-40 mole %; and

Ceramic dielectrics and compositions therefor

A process for producing a composition which includes a perovskite compound, the process comprising:

Process for producing a composition which includes perovskite compounds

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Sakai, Japan

Masashi Aoki