Other

Japan Metals & Chemicals Co., Ltd.

The Furukawa Electric Co., Ltd.

Research Development Corporation of Japan

Research Development Corporation

Toshitsugu Matsuda

Hiroyuki Nakae

Toshio Hirai

Yukio Matsunami

Tsuyoshi Masumoto

Chorji Sakai

Takao Yonezawa

Sinichi Saitoh

Hatsuyuki Abe

Naoki Uno

Ceramic composite articles having dispersed whiskers or platelets oriented parallel to an outer surface of the articles and in two-dimensionally random directions thereof. The articles may be made by forming and sintering under a pressure of about 1 to 10 atmospheres without using hot press methods or hot isostatic pressing methods.

Ceramics composite article and method for making same

Polycrystalline rhombohedral boron nitride and method of producing the

A transparent BN-type ceramic material comprising 10 to 40 wt. % of boron (B), 35 to 55 wt. % of nitrogen (N) and 3 to 40 wt. % of silicon (Si) as the main component elements, and 1 to 10 wt. % of sub-component elements, with the property of not being crystallized by heat treatment at 1600.degree. C. for one hour, and a method of producing the above ceramic material by reacting a boron-containing compound, a nitrogen-containing compound and a silicon-containing compound at deposition temperatures in a range of more than 1300.degree. C. to less than 1700.degree. C. with the total gas pressure within a reaction furnace maintained in the range from 10 Torr to 100 Torr by use of a chemical vapor deposition method are disclosed.

Transparent BN-type ceramic material and method of producing the same

Boron nitride containing titanium nitride in an amount of 0.05 to 10 wt. % which is produced at a relatively low temperature, utilizing a chemical vapor deposition technique. In the deposition process, boron, titanium and nitrogen source gases are introduced into an evacuated reactor together with a carrier and/or diluent gas and contacted with a heated substrate previously mounted in the reactor, whereby boron nitride with titanium nitride is deposited onto the substrate. The deposit thus obtained has a high density, a significantly improved heat-shielding ability, a high degree of anisotropy with respect to thermal diffusivity and a high chemical stability. By using such anisotropic boron nitride with BN ceramics, very useful BN type composite ceramics can be produced.

Boron nitride containing titanium nitride, method of producing the same

Growing community of inventors

Yokohama, Japan

Toshitsugu Matsuda