Plastic and nonmetallic article shaping or treating: processes – Formation of solid particulate material directly from molten... – By impinging or atomizing with gaseous jet or blast
Patent
1990-04-16
1991-07-02
Theisen, Mary Lynn
Plastic and nonmetallic article shaping or treating: processes
Formation of solid particulate material directly from molten...
By impinging or atomizing with gaseous jet or blast
264 13, 264 56, 423335, 423338, 423339, B29B 910, C01B 3312, C01B 3318
Patent
active
050283600
ABSTRACT:
A method of manufacturing spherical silica particles comprising the steps of processing in an acid-containing solution and then washing with water the coagulant derived from an aqueous alkali metal silicate solution extruded through pores in a water-miscible organic medium or acid solution, wet-grinding the amorphous silica thus obtained in a liquid dispersion medium to obtain a fine particle silica suspension with a weight average particle size of 10 .mu.m or less, spray-drying this fine particle silica suspension with hot air and sintering the spherical granulated silica thus obtained. According to the present invention, the high-purity spherical silica particles can be obtained with high solidity and adjusted surface smoothness without any complicated operation or waste water treatment for use as a sealant filler for highly-integrated IC electronic parts.
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Higashiogawa Takashi
Ito Yuziro
Matsuura Masahiro
Orii Koichi
Yamaguchi Yasumasa
Nitto Chemical Industries Co., Ltd.
Theisen Mary Lynn
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