新型陶瓷粉/冶炼渣微晶泡沫玻璃研制

Preparation of foam-glass ceramics from smelting slag andprocelain tile

以冶炼渣为主要原料,配比一定比例陶瓷废料调质,采用“一步法”粉末烧结法制备新型微晶泡沫玻璃。以控制变量法研究不同掺量的Na2CO3对微晶泡沫玻璃的影响;结合DSC、XRD、TOM-ac等现代分析测试技术,分析微晶泡沫玻璃样品气孔结构、玻璃物相组成、样品烧结过程中形貌体积变化,优化研制配方。该实验过程中所制备的微晶泡沫玻璃的晶相以硅灰石Ca3Si3O9与次透辉石CaFe(Si2O6)为主,其抗压强度可达到13.06 MPa,密度为0.731 g/cm^3。制备得到泡沫微晶玻璃集中了微晶玻璃和泡沬玻璃的优点,具有机械强度高、密度小、热膨胀系数小、化学稳定性优良等特点,既解决了污染环境、资源浪费等问题,同时在建筑等行业具有广泛的应用价值,为冶炼渣的综合利用提供了新的途径。

A new type of foam-glass ceramics was synthesized by the method of powder sintering(one-step)with smelting slag and porcelain powder as the main raw material.In addition,the pore structure,glass phase composition,glass network structure and crystal structure of foam-glass ceramics were explored by modern analytical techniques such as DSC,XRD and TOM-ac.The foam-glass ceramics prepared by the experiment was composed of wollastonite CaSiO3 and diopside CaMgSi2O6.The compressive strength was 13.06 MPa and the density was 0.731 g/cm^3.In this study,a new way for the comprehensive utilization of hazardous waste was provided.The preparation of foam glass ceramics combined the merits of the glass ceramics and foam glass.It not only solved the problems of polluting the environment and wasting resources,but also got the quality products which was valuable to human activities,and improved the added value of slag.