晶化温度对热态钢渣基微晶玻璃结构和性能的影响

Effect of Heat Treatment Process on the Micro Structure and Properties of Steel Slag Based Glass-ceramics

以模拟液态钢渣为原料，以质量比为1：1的比例加入石英砂进行调质后，得到的钢渣玻璃熔体采用熔融法制备微晶玻璃。利用DTA、XRD、SEM／EDX研究了晶化温度对微晶玻璃析晶和性能的影响。结果表明：随着晶化温度的增加，样品的密度呈先增加后减小，耐腐蚀性呈逐渐增强的变化趋势。经700℃核化2h、950℃晶化2h后的微晶玻璃综合性能最好。主晶相为普通辉石[Ca（Mg，A1，Fe）SizOs]和透辉石[（MgsAl2Fe2）Ca（Si1.5Al5）O2]，晶体形貌为颗粒状，直径约为20-60nm，分布均匀。

The simulated molten steel slag was used as raw materials to prepared glass-ceramics using melting quench- ing method. The quartz sand was added in to adjust the steel slag component with the mass ratio of 1 ： 1. Effects of tem-perature on the crystallization and properties of glass-ceramics were studied by DTA, XRD, SEM / EDX. The results show that with the increases of crystallization temperature, the density of samples first increases and then decreases, and corrosion resistance increases gradually. The sample has good comprehensive properties after nucleation at 700 ℃ for 2 hours, followed with crystallization at 950 ℃ for 2 hours. Main phases in glass-ceramics were augite [Ca （Mg, Al, Fe） Si2 O6 ] and diopside [（Mg6 A;2 Fe2 ）Ca（Si1.5Al5 ）O2 ]. Granular crystals uniformly distributed in the glass matrix with average particle size of 20-60 nm.