TiO2 对黄金尾砂微晶泡沫玻璃非等温析晶活化能的影响

以黄金尾砂为主要原料,改变原料中晶核剂TiO2的掺量,制备微晶泡沫玻璃.运用差热分析(DSC)、X射线衍射仪(XRD)等分析手段,研究TiO2掺量对微晶泡沫玻璃析晶与发泡的影响.结果表明,随着TiO2含量的增加,析晶活化能呈现出先减小后增大的规律,当TiO2添加量为3.5％时,析晶活化能较小,为95kJ/mol;同时微晶泡沫玻璃析出的主晶相为硅灰石(CaSiO3),次晶相为钙长石(CaAl2Si2O8);当TiO2添加量为3％～4％时,制备得到的微晶泡沫玻璃具有良好的物理性能;主晶相硅灰石(CaSiO3)不随TiO2的添加改变,并且TiO2能促讲晶相牛长.

Effect of TiO2 on crystallization activation energy of gold tailings microcrystalline foam glass

Microcrystalline foamed glass was prepared from gold tailings as the main raw material and the amount of MICROTEK nucleating agent TiO₂ was changed. The effects of TiO₂ content on the crystallization and foaming of microcrystalline foamed glass were studied by means of differential thermal analysis (DSC) and X ray diffractometer (XRD).The results show that with the increase of the content of titanium dioxide, the activation energy of crystallization first decreases and then increases.When the addition amount of TiO₂ is 3.5%, the crystallization activation energy is the smallest, 95KJ/mol. The main crystalline phase of the microcrystalline foamed glass is wollastonite (CaSiO₃); and the secondary phase is calcium feldspar (CaAl₂Si₂O₈);At the same time, when the amount of TiO₂ is 3%~4%, the sintered microcrystalline foamed glass has good physical properties;The main crystalline phase wollastonite (CaSiO3) does not change with the addition of TiO₂, and TiO₂ can promote crystal phase growth.