ผลของค่าสัมประสิทธิ์การขยายตัวทางความร้อนของดินขาวลำปางที่เติมวัตถุดิบ กลุ่มฟลักซ์ต่างกัน (THE COEFFICIENT OF THERMAL EXPANSION OF LAMPANG KAOLINITE AT DIFFERENT FLUX MATERIAL)

Abstract

This research aims to study the influence of the flux material affecting the thermal expansion coefficient of the Lampang kaolin and to find correlation between coefficients of thermal expansion of the Lampang kaolin and the glaze without having the “crazing” defect. The experiments were divided into two parts. Firstly, the experiment studied influence of the flux material affecting the thermal expansion coefficient of the Lampang kaolin. The research suggests that the increasing amount of flux material affected the rise of thermal expansion coefficients of Lampang kaolin. The second part of the research studied deeper in a relationship between Lampang kaolin and the glaze. The result showed that Lampang kaolin and the glaze can be combinded, and the crazing in the glaze can be prevented when the different thermal expansion coefficients of Lampang kaolin and glaze was less than 3.4778 x 10^-6๐C^-1.