The Influence of Base Concentration on the Surface Particle of Lithium Aluminosilicate System


The study of base concentration effect toward surface particles of lithium aluminosilicate glass ceramic system has been done by using NaOH solution. The parent glass with composition of 60% Si02, 31% Li20, 6% Al203 and 3% Ti02 in wtOlowas prepared by melting process at 1250 °C prior to quenching rapidly to room temperature. Sintering and crystallization process on this parent glass were carefully examined by Differential thermal analysis (DTA) and X-Ray Diffraction (XRD). Based on these analyses, the selected crystal has been chosen as a precursor material. There are two controlling parameter involved in this study i.e. NaOH concentration and leaching period. The morphology of the glass ceramic particle was observed by Field Emission Scanning Electron Microscope (FESEM). The result shows that by increasing the basic concentration as well as increasing the soaking leaching period, the tendency of glass ceramic particle to leach out is relatively high. Keywords: Lithium aluminosilicate, glass ceramic, leaching, porous PACS: 81.05.Kf. 1. M. Nazri, M. A. Sri Asliza and R. Othman School of Material and Mineral Resources Engineering, Engineering Campus Universiti Sains Malaysia, 14300 Nibong Tebal Pulau Pinang,Malaysia