Narumi China Corporation

Kabushiki Kaisha Vitamin Kenkyuso

Osamu Nakagawa

Masayasu Kurono

Shinsuke Yano

Susumu Nishigaki

Yoshiro Ishiwata

Masashi Fukaya

Junzo Fukuda

Tomio Ogasawara

Takafumi Iida

Meiji Kuwayama

Low temperature fired ceramics are produced by a highly improved method, using a specially designed apparatus and the obtained ceramic products are very useful in various applications, such as electronic components, heat resistant articles, tablewares, kitchen utensils or decorative articles because of a combination of superior properties, particularly high heat resistance, high mechanical strength, low thermal expansion and low dielectric constant. In practicing the method, a low firable ceramic material is shaped into a green sheet and then converted to a dense fired ceramic product by rapid firing in an adequate air. In the firing step, the air feed ratio (the ratio of the quantity of feed of air to the theoretical quantity of air required for combustion) is controlled so as to be at least 1.5 thereby the aimed fired products can be obtained in a greatly reduced firing time, without causing deformation or warpage of the ceramics or ignition of the decomposition gases of a binder.

Method for manufacturing low temperature fired ceramics

A novel polymer-metal complex containing quaternary nitrogen atoms, which is obtained by subjecting polyethylenepolyamine or polyethyleneimine to a reaction with a bifunctional compound represented by the formula

Polymer-metal complexes containing quaternary nitrogen atoms used in the

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Nagoya, Japan

Osamu Nakagawa