利用固体废弃物制备泡沫陶瓷的研究

Study on Preparation of Foam Ceramics From Solid Waste

以煤矸石和废弃陶瓷等为主要原料,以长石为助溶剂,淀粉为造孔剂,在不同烧结温度下,制备出轻质、导热系数低、力学性能好和气孔形貌尺寸可控的煤矸石泡沫陶瓷。在分析原材料组成成分的基础上,对自制样品在不同烧成温度下的体积密度、显气孔率、抗压强度、导热系数变化规律进行了分析研究,得出了以下结论:在试验过程中,不断增温时,该样品气孔率先呈现增加而后又减小。样品气孔率较高时,材料内部疏松,故抗压强度降低;抗压强度大于2MPa时,其导热系数经历了由大变小再增大的过程。

With yangquan coal waste resource gangue and yangquan local waste ceramics as the main raw materials, with SPAR as cosolvent and starch as poreforming agent, the gangue foam ceramics with light weight, low thermal conductivity, good mechanical properties and controllable porosity and size were prepared at different sintering temperatures.On the basis of analyzing the composition of raw materials,the variation rules of bulk density, apparent porosity, compressive strength and thermal conductivity of self-made samples at different firing temperatures were studied. The main conclusions are as follows: During the experiment, the stomata of the sample first increased and then decreased with increasing temperature. When the sample porosity is high, the material is loose inside, so the compressive strength of foam ceramic sample is reduced, but the compressive strength exceeds the index of "high-efficiency composite external wall thermal insulation material", the compressive strength is greater than 2 MPa. In this process, the thermal conductivity of gangue foam ceramics has experienced a process of decreasing and increasing again.