Method of a high temperature thermal induced phase transformation of zeolite in the process of obtaining the different materials of feldspar topology

Abstract

The preparation of various aluminosilicate ceramic materials using synthetic zeolites as the precursors has been a topic of great interest during the last three decades. This method of synthesis is often called the thermal-induced transformation of zeolite (ZTIT) and has the certain advantages over the other conventional methods. This paper presents the comparative results of structural and microstructural tests the products of high-temperature thermal transformation of zeolite Pb, Mn - LTA topology. After thermal treatment at temperature between 700º - 1500º C, it is transformed into different feldspar structures. Mn-LTA zeolite at temperature of 1300 ºC is changed to the structure of Mnanorthite with parameters (a=8.109(2) b= 12.824 (3) c=7.067 (4) b=115.89º(3). Pb-LTA zeolite transforms into the Pb-celsian structure at temperature of 1200 ºC (a=8.411(2) b= 13.047 (3) c=7.163 (4) b=115.35º(3). Structural and microstructural parameters were determined by the X-ray powder diffraction method on a polycrystalline sample, using the Fullprof program.