MgO-Al_2O_3-SiO_2系微晶玻璃制备工艺与力学性能研究

Fabrication Techniques and Mechanical Properties of Glass-Ceramics in MgO-Al_2O_3-SiO_2 System

以煤矸石、菱镁矿、工业氧化铝、SiO2为原料,通过扫描电镜(SEM)、X射线衍射仪(XRD)等技术,对以TiO2作为晶核剂的堇青石基微晶玻璃的晶化、核化和力学性能进行了研究。对热处理工艺与物相结构、体积密度、力学性能之间的关系作了分析。微晶玻璃的抗压强度取决于热处理工艺,经800℃,3 h和1200℃,4h处理后,所制备的微晶玻璃体积密度达到2.68 g/cm3,具有良好的力学性能,其抗压强度达到42 MPa。

The coal gangues, magnesite, alumina and silica are used as the main raw materials, crystallization, nucleating, mechanical properties of cordierite glass-ceramics containing TiO2 as nucleating agent was studied by XRD, SEM techniques. The relationships between phase structure, bulk density, mechanical properties and heat treatment methods were well discussed. Compressive strength of this material mainly depend on heat treatment methods. When the sample is heated at 800℃ for 3 h and then at 1200 ℃ for 4 h, the bulk density can reach to 2.68 g/cm^3 ,excellent mechanical properties can be obtained and its compressive strength can reach to 42 MPa.