以含钛高炉渣为主要原料制备了泡沫玻璃绝热材料、研究了添加剂包括发泡剂、稳泡剂和助熔剂对泡沫玻璃性能的影响.首先对添加剂的掺量进行单因素分析,确定热处理工艺参数范围,再利用正交优化手段,确定最优工艺参数.结果表明:发泡剂掺量对泡沫玻璃的孔径大小、孔的均一性影响较大;稳泡剂的掺量在一定程度上对大泡的生成起到了限制作用;添加剂对泡沫玻璃性能的影响程度顺序为发泡剂>稳泡剂>助熔剂.添加剂的最优掺量(质量分数)为:发泡剂碳酸钙1.5%,稳泡剂磷酸钠6%,助熔剂硼砂6%.经过预热、烧结、发泡以及稳泡和退火等热处理工艺,制得了孔径均匀、导热系数小等优异性能的泡沫玻璃.XRD分析表明:试样均为非晶态,其中有少量晶体生成,试样内部残晶为钙铁透辉石.
The foam glass insulation material is prepared by using Titania-bearing blast furnace slag as the main raw material. The impact of additives including foaming agent, foam stabilizer, and flux on glass properties is examined. The single-factor experiment was adopted to determine the range of process parameter, and then it is optimized by orthogonal means and the optimal quantity is founded. The results show that the quantity of foaming agent has a great effect on the average diameter and pore's homogeneity of foam glass. The quantity of foam stabilizer has a lim-it function to the big bubble's production. The degree of impact of additives on glass properties arrange in an order of calcium carbonate, foaming agent and borax flux. The optimal number value of added additives is confirmed by u-sing orthogonal method as 1.5%, 6%, and 6% for calcium carbonate, foaming agent, borax flux respectively. Af-ter preheating, sintering, foaming and foam stability and annealing heat treatment process, an amorphous foam glass with uniform pore size and small thermal conductivity was obtained. XRD analysis shows that the sample interior has the little crystalline state production and sample internal malcrystalline is phosphorus quartz.
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