Fabrication of Cubic Cs-leucite Porous Body and its Low Thermal Expansion Property

Abstract

Cs_0.9Al_0.9Si_2.1O₆ is an aluminosilicate compound showing a low thermal expansion property. In this work, the porous body of Cs_0.9Al_0.9Si_2.1O₆ was fabricated by an addition of PMMA. When 40wt% PMMA was added, the porous body fabricated by a heat treatment of 1400°C for 20h, had the relative density of 46% and showed the thermal expansion rate of 0.105% with a small hysteresis. Thus it was found that the porous body of Cs_0.9Al_0.9Si_2.1O₆ showed a further low-thermal expansion property.