Ngk Insulators, Inc.

Nippon Oil Company

The Tokyo Electric Power Company, Incorporated

Fuji Engineering Co., Ltd.

Fuji Denki Co., Ltd.

E.p.s. Engineering Co., Ltd.

Nippon Oil Engineering and Construction Company Limited

Yutaka Furuse

Tomonori Takahashi

Yoshiaki Matsushita

Keiji Matsuhiro

Hiromichi Kobayashi

Tuneo Miyake

Naohito Yoshii

A coated ceramic member includes a silicon nitride- or silicon carbide-based ceramic base material, a silicon nitride or silicon carbide film formed on the base material by CVD, and an oxide film formed on the film of CVD, and a process for producing the ceramic-coated member. This coated ceramic member maintains excellent durability under severe conditions, for example, in a high-speed combustion gas.

Process for production of coated ceramic member

Coated ceramic member and process for production thereof

A burner for burning liquid fuel is provided, which atomizes liquid fuel together with an atomizing medium mixed with the fuel. The inhibition of generation of NOx in exhaust gas and that of generation of soot and dust are caused to be compatible by the burner, and the manufacturing properties are improved and the turndown ratio is increased.

Burner for burning liquid fuel

A sintered ceramic composite body is manufactured by preparing a powdery mixture composed of a base material composed of either one of oxide ceramic such as alumina, mullite, magnesia, or the like, and nonoxide ceramic such as silicon nitride, sialon, or the like, and a reinforcement material composed of particles or platelet particles of silicon carbide which have a size ranging from 5 to 20 .mu.m, the particles of silicon carbide being contained at a volume ratio ranging from 3 to 50%. The platelet particles have a maximum diameter ranging from 5 to 50 .mu.m and a thickness which is 1/3 or less of the maximum diameter. The powdery mixture is molded into a shaped product, which is then sintered in a temperature range from 1,400.degree. to 1,900.degree. C. for the base material which is composed of oxide ceramic or in a temperature range from 1,500.degree. to 2,000.degree. C. for the base material which is composed of nonoxide ceramic.

Sintered ceramic composite body and method of manufacturing same

A sintered ceramic composite body is manufactured by preparing a powdery mixture composed of a base material composed of either one of oxide ceramic such as alumina, mullite, magnesia, or the like, and nonoxide ceramic such as silicon nitride, sialon, or the like, and a reinforcement material composed of particles of silicon carbide which have a size of 1 .mu.m or less and a size ranging from 5 to 20 .mu.m, or have a size of 1 .mu.m or less and platelet silicon carbide particles having a maximum diameter ranging from 5 to 50 .mu.m and a thickness which is 1/3 or less of the maximum diameter, the particles of silicon carbide being contained at a volume ratio ranging from 10 to 50%. The powdery mixture is molded into a shaped product, which is then sintered in a temperature range from 1,400.degree. to 1,900.degree. C. for the base material which is composed of oxide ceramic or in a temperature range from 1,500.degree. to 2,000.degree. C. for the base material which is composed of nonoxide ceramic.

Disclosed are a fuel spraying method in a liquid fuel combustion burner for spraying a liquid fuel together with an atomization-promoting fluid mixed in the fuel, and a liquid fuel combustion burner, in which the liquid fuel is mixed with the atomization-promoting fluid while turning the liquid fuel in flow passages of injection holes, and streams injected from the injection holes are caused to impinge against one another in the presence of combustion air in a combustion apparatus. According to this fuel spraying method and this liquid fuel combustion burner, the atomization of the liquid fuel is promoted and the flame is dispersed while promoting the contact with air, and it therefore becomes possible to simultaneously control generation of NO.sub.x and generation of soot.

Growing community of inventors

Tokyo, Japan

Yutaka Furuse