Tokuyama Corporation

Shinshu University

Kyoichi Fujinami

Osamu Iwamoto

Masato Sekino

Shota Daiki

Masaaki Ushioda

Katsuya Teshima

Teruhiko Nawata

Tetsuya Yamada

Yuichi Ikeda

It is an object to achieve a resin sheet having high thermal conductance and high dielectric strength. Hexagonal boron nitride powder in accordance with an aspect of the present invention includes hexagonal boron nitride agglomerate particles each including agglomerated hexagonal boron nitride primary particles, and has a specific surface area of not less than 0.5 m/g and not more than 5.0 m/g. The hexagonal boron nitride primary particles each have a long diameter of not less than 0.6 μm and not more than 4.0 μm and an aspect ratio of not less than 1.5 and not more than 5.0.

Hexagonal boron nitride powder, resin composition, resin sheet, and method for producing hexagonal boron nitride powder

To provide a hexagonal boron nitride powder which contains agglomerates, has a maximum torque calculated by measuring in accordance with JIS-K-6217-4 of 0.20 to 0.50 Nm, a DBP absorption rate of 50 to 100 ml/100 g, a tap bulk density of 0.66 to 0.95 g/cmand reduced anisotropy of heat conduction and can provide high heat conductivity and dielectric strength to a resin composition produced by filling a resin therewith and a process for producing the powder by carrying out a reduction nitriding reaction using boron carbide.

Hexagonal boron nitride powder and production process therefor

A method of preparing a ceramic artificial crown by applying at least one kind of dental porcelain onto the surface of a ceramic core molded by heating and softening a ceramic material and putting it into a mold with the application of pressure followed by firing wherein said mold is the one formed by burning a wax pattern after having removed a crucible former from an assembly which makes it possible to efficiently prepare a fully ceramic artificial crown of a high quality in a short period of time.

Method of preparing a ceramic artificial crown and a preparation kit used therefor

Method of producing ceramic crowns

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Tokuyama, Japan

Kyoichi Fujinami