Daikin Industries, Ltd.

Sakai Chemical Industry Co., Ltd.

Yasuyuki Murakami

Hironobu Ogata

Hisao Koizumi

Satoshi Komori

Takashi Ochiai

Satsuki Motoishi

An amorphous silica powder comprising boron atoms. The amorphous silica powder comprising boron atoms has an average particle size from 10 to 100 nm, as determined from 40 particles selected at random in a transmission electron micrograph. The amorphous silica powder comprising boron atoms has a decrement in a boron content of 10 mass % or less, when fired under the following conditions: 5 to 10 g of a dried product of the boron-containing amorphous silica powder is filled into an alumina crucible, heated in the atmosphere at 200° C./hour to 1000° C. to 1100° C., maintained as it is for 5 hours, and cooled to room temperature.

Boron-containing amorphous silica powder and method of producing same

Variable displacement type piston machine of which noise and vibration

Growing community of inventors

Osaka, Japan

Yasuyuki Murakami