Title:
CONTROL OF THERMAL EXPANSION OF POTTERY BASIS MATERIAL
Document Type and Number:
Japanese Patent JPH04124060
Kind Code:
A
Abstract:
PURPOSE: To obtain a pottery basis material having a thermal expansion coefficient with high accuracy by blending SiO2, Al2O3 and alkaline components in a ratio satisfying a specified relationship and calcining the resultant mixture.
CONSTITUTION: In calcination of SiO2, Al2O3 and R2O (R is Na2O+K2O) using a roller hearth kiln, the respective components are blended in accordance with a thermal expansion coefficient (Y)=(0.2-0.4) [SiO2]-(0.3-0.6)[Al2O3]-(0.1-0.4)[R2 O]+C1 (Each number shows wt.% of respective component. C1 is additional constant). In case of calcination using a tunnel kiln, (Y)=(0.1-0.2)[SiO2]-(0.2-0.3)[Al2O3]+(0.4-0.8)[SiO2]/[Al2O3]+C2.
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Inventors:
KAWAI KAZUYUKI
Application Number:
JP24163090A
Publication Date:
April 24, 1992
Filing Date:
September 12, 1990
Export Citation:
Assignee:
INAX CORP
International Classes:
G01N25/16; C04B33/02; C04B33/13; C04B33/24; C04B33/32; C04B35/18; (IPC1-7): C04B33/02; C04B33/32; C04B35/18; G01N25/16
Attorney, Agent or Firm:
Kazuo Yoshida
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