SYNTHETIC AMORPHOUS SILICA POWDER AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2011/083699

A1

Disclosed is a synthetic amorphous silica powder, which is obtained by subjecting a silica powder to spheroidizing treatment and then cleaning and drying the resulting silica powder, and which has an average particle diameter D50 of 10-2,000 μm. The synthetic amorphous silica powder is characterized by having a value, which is obtained by dividing the BET specific surface area by the theoretical specific surface area as calculated from the average particle diameter D50, of 1.00-1.35, a true density of 2.10-2.20 g/cm3, an intramolecular porosity of 0-0.05, a circularity of 0.75-1.00, and an undissolved ratio of 0.00-0.25. Since the amount of gas components adsorbed on the surface of the synthetic amorphous silica powder or contained in the powder is little, a synthetic silica glass product that is produced using the powder can be greatly reduced in generation or expansion of gas bubbles even when used in a high temperature and reduced pressure environment.

JPH0668084	[Title of the Invention] A method for producing a surface hydrophobic metal material.
WO/2010/071010	CHAIN-SHAPED SILICA-BASED HOLLOW FINE PARTICLES AND PROCESS FOR PRODUCING SAME, COATING FLUID FOR TRANSPARENT COATING FILM FORMATION CONTAINING THE FINE PARTICLES, AND SUBSTRATE WITH TRANSPARENT COATING FILM
JP2020525389	How to make highly dispersed silicon dioxide

UEDA TOSHIAKI (JP)

PCT/JP2010/073291

July 14, 2011

December 24, 2010

Click for automatic bibliography generation  

MITSUBISHI MATERIALS CORP (JP)
UEDA TOSHIAKI (JP)

C01B33/18; B01J19/08; B07B4/02; B22F1/00

JPH06287012A	1994-10-11
JP2004225135A	2004-08-12
JP2005531475A	2005-10-20
JPH06191823A	1994-07-12

See also references of EP 2522629A4

SUDA, MASAYOSHI (JP)
Masayoshi Suda (JP)

View/Download PDF      PDF Help

Previous Patent: SWINGING INTERNAL ENGAGEMENT TYPE PLANETARY GEAR DEVICE

Next Patent: CHROMIUM PLATING METHOD