浆料参数对石英砂保温材料的性能影响

Effect of Slurry Parameters on Properties of Quartz Insulation Materials

以长江沿岸低品位石英砂为主要原料,采用真空烧结制备石英质多孔材料,为新型保温材料的开发提供参考。通过实验分析,结果表明:随着高岭土含量逐渐增加,石英保温材料气孔率呈减小趋势。随着水料比增大,坯体成型性呈变差趋势,石英保温材料气孔率先增大后降低。随着发泡剂含量的增加,坯体成型性先变好后变差,石英保温材料气孔率呈现增大趋势。结合性价比综合考虑,当水料比为1.4,高岭土含量为30wt.%,发泡剂含量在1wt.%时,湿混6 h时,在木质模具中浇注成型,自然干燥,1150℃烧结1 h,所得石英保温材料具有较佳的综合性能。

Porous quartz materials were prepared with the low grade quartz sand obtained from along the Yangtze River via the vacuum sintering method in an effort to develop new heat insulating materials. The research results are shown as follows： the porosity of quartz insulation materials decreases with the increase of the kaolin content. The forming property of porous quartz materials decreases and the porosity of porous quartz materials first increases and then decreases with the increase of the water to raw materials ratio. When the foaming agent content is increased, the forming property of porous quartz materials is first increased and then decreased, and the porosity shows the increased tendency. When batched with 60% quartz sand, 30% kaolin, 1% foaming agent and 9% sintering additive, ball milled for 6 h with the ratio of water to raw materials at 1.4, sintered at 1150 ℃ for 1 h, the samples with better properties can be obtained.