A Study on the Preparation Technique of Machinable Si-Al-F System Glass-Ceramic ——Effects of the Chemical Compositions on Melting and Crystallizing Process
The melting and subsequent crystallizing process are key steps in the preparation of machinable glass ceramic. The chemical compositions has a significant effect on them. Crystallizing isn ’t wanted in melting process and higher percentage of crystal isn ’t in crystalline process. The lower contents of Al 2O 3 and MgO can low down the melting temperature. The higher content of Fluoride is, the lower temperature of melting can be. The most proper proportions of some chemical compositions are shown up i...