Synthesis of Leucite from Potash Feldspar  

作　　者：ZHANG Yi QU Chi WU Jianqing LU Ming RAO Pinggen LIU Xiaoxi 

机构地区：[1]Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology Ministry of Education South China University of Technology, Guangzhou 510640, China [2]College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2008年第4期452-455,共4页武汉理工大学学报（材料科学英文版）

基　　金：the National High Technology Research and Development Program of China(No.2002AA302204);Science and Technology Program of Guangdong Province of China(No.2001A1070102);Science and Technology Program of Guangzhou City of China

摘　　要：Leucite particles were synthesized from feldspar mixed with 0% to 52% potassium nitrate fired from 800 ℃ to 1 200 ℃ by solid state method. The X-ray Diffraction （XRD） patterns show that in the temperature range from 800 ℃ to 1 200 ℃, the leucite can be removed as the single crystalline phase. Kalsilite may be crystallized with leucite at 800 ℃, but can be eliminated after prolonged heating. The scanning electron Microscopy （SEM） images clearly display the that crystals of micrometer scale leucite, and the leucite crystals distribute evenly in the matrix. The Thermal expansion coefficient （TEC） of the samples fabricated is as high as 20.52×10^-6 ℃^-1 measured from 20 ℃ to 500 ℃. The mechanism of transformation from feldspar to leucite was proposed.Leucite particles were synthesized from feldspar mixed with 0% to 52% potassium nitrate fired from 800 ℃ to 1 200 ℃ by solid state method. The X-ray Diffraction （XRD） patterns show that in the temperature range from 800 ℃ to 1 200 ℃, the leucite can be removed as the single crystalline phase. Kalsilite may be crystallized with leucite at 800 ℃, but can be eliminated after prolonged heating. The scanning electron Microscopy （SEM） images clearly display the that crystals of micrometer scale leucite, and the leucite crystals distribute evenly in the matrix. The Thermal expansion coefficient （TEC） of the samples fabricated is as high as 20.52×10^-6 ℃^-1 measured from 20 ℃ to 500 ℃. The mechanism of transformation from feldspar to leucite was proposed.

关 键 词：LEUCITE SYNTHESIS potash feldspar 

分 类 号：O614.113[理学—无机化学]