Title:
PRODUCTION OF CORDIERITE POWDER AND ITS CERAMIC
Document Type and Number:
Japanese Patent JP3217502
Kind Code:
B2
Abstract:
PURPOSE: To provide cordierite powder and its ceramic having sufficiently high mechanical strength for a circuit substrate, etc., a thermal expansion coefficient close to that of silicon and low dielectric constant and sinterable at a low temperature.
CONSTITUTION: A cordierite composition sol is prepared by mixing alumina sol, silica sol and a water-soluble magnesium salt at ratios to get a composition composed of 25-38wt.% of Al2O3, 45-58wt.% of SiO2 and 12-20wt.% of MgO. The sol prepared by the above process is incorporated with 0.05-10wt.% of boric acid (in terms of B2O3 based on cordierite) and gelatinized. The gel obtained by the gelatinization process is calcined to form cordierite powder.
Inventors:
M.G.M.Y.Ismile
Zenjiro Nakai
Kazuko Haga
Zenjiro Nakai
Kazuko Haga
Application Number:
JP32971292A
Publication Date:
October 09, 2001
Filing Date:
December 09, 1992
Export Citation:
Assignee:
Taiheiyo Cement Co., Ltd.
International Classes:
C01B13/32; C01B13/34; C01B33/26; C01B39/06; C04B35/195; H05K1/03; (IPC1-7): C04B35/195; C01B33/26
Domestic Patent References:
| JP4338164A | ||||
| JP2116613A | ||||
| JP4213805A | ||||
| JP58176127A |
Attorney, Agent or Firm:
Katsumi Utaka (1 outside)