Nippon Steel Corporation

Kei Tanemoto

Takao Kanai

Hiroshi Kubo

Shuichi Yamazaki

Takeo Nagashima

Hidehiro Endo

Toyohiko Sato

Akiro Ando

Low core loss oriented electrical steel sheet having a surface coating that has a Young's modulus that is not less than 100 GPa and a differential of thermal expansion coefficient relative to the sheet base metal that is not less than 2.times.10.sup.-6 /K and which contains not less than 10 percent, by weight, of crystallites with an average size of not less than 10 nm and an average crystal grain diameter that does not exceed 1000 nm, and a method of manufacturing same.

Oriented electrical steel sheet having low core loss and method of

In a method for producing PLZT powder, the A-site components are co-precipitated simultaneously and mixed with the B-site components which are also co-precipitated simultaneously. As a result, the powder obtained by calcination of the precipitates has less fluctuation in the chemical composition compared with the prior art.

Method for producing PLZT powder

Disclosed is a ceramic composite consisting essentially of hexagonal boron nitride (h-BN), aluminum nitride and, if any, unavoidably formed aluminum oxynitride (AlON), and a sintering aid and/or a reaction product of the sintering aid with the above-mentioned components (h-BN, AlN and AlON), in which the total amount of the sintering aid and the reaction product is 0.01 to 5 parts by weight per 100 parts by weight of the sum of h-BN, AlN and AlON. This sintered body comprises AlN and AlON in a total amount of 45 to 5% by weight with 55 to 95% by weight of h-BN. Alternatively, this sintered body comprises AlN and AlON in a total amount of 80 to 5% by weight with 20 to 95% by weight of h-BN, the degree of anisotropy of the thermal conductivity of the sintered body (the ratio of the maximum thermal conductivity to the minimum thermal conductivity, the direction of the maximum thermal conductivity being perpendicular to the direction of the minimum thermal conductivity) being at least 2.

Ceramic composite and process for preparation thereof

A sintered non-oxide ceramic composite high in density, high-temperature strength and toughness and having optionally and widely changeable electrical conductivity is obtained by compacting and sintering a mixed powder comprising 5-95% by weight of at least one compound selected from titanium carbide, nitride and carbonitride, 0.1-5% by weight (based on silicon carbide) of boron or boron compound in terms of boron, 0.1-5% by weight (based on silicon carbide) of carbon or carbon compound in terms of residual carbon and the balance of substantially silicon carbide.

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Kawasaki, Japan

Kei Tanemoto