烧成温度和成孔剂掺量对烧结制备保温材料性能的影响

Effect of Sintering Temperature and Pore-forming Agent Content on the Performance of Insulation Material

本文对利用新疆页岩加入兰炭成孔剂制备的烧结保温材料的各项性能进行研究。首先对原料的理化指标进行实验分析,分析结果为：新疆页岩的化学成分适宜制备烧结保温砌块,页岩烧成温度范围为850~1050℃,最佳烧成温度为950℃。其次,向页岩中添加不同比例的兰炭成孔剂,在不同温度下烧成,测试其抗压强度、体积密度及显气孔率。结果表明：随着烧成温度的升高,试样抗压强度增大,体积密度增加,显气孔率降低;随着成孔剂掺量的增加,试样抗压强度下降,体积密度减小,显气孔率提高。当造孔剂添加量为12%,烧成温度为1040℃时,试样抗压强度等级达到MU20,导热系数下降至0.3598 W/（m·K）,比不加成孔剂降低了20%以上。SEM分析结果表明,加入成孔剂后可使试样内部产生微孔,使导热系数降低。

In this paper, the production of sintered insulation materials by using Xinjiang shale with semi coke was researched. First, the physical and chemical index of raw material was experimentally analyzed. The results showed that Xinjiang shale＇s chemical composition is suitable for producing sintered insulation brick. The sintering temperature range of shale is from 850 to 1050 ℃. The best sintering temperature is 950 ℃. Second, Xinjiang shale was added with different percentages of semi coke and sintered under different temperature. The sample＇ s compressive strength, volume density and apparent porosity were then tested. The results show that, with the sample＇ s sintering temperature increasing, the compressive strength and the volume density was increased while the apparent porosity was reduced. With the percentage of pore-forming agent increasing, the compressive strength and the volume density was reduced while the apparent porosity was increased. The sample＇ s compressive strength can be reached MU20 when adding 12% pore-forming agent into the samples and the sintering temperature was in 1040 ℃. The thermal conductivity decreased to 0. 3598 W/（ m· K） , more than 20% reduction. The SEM analysis result shows that, with pore-forming agent adding to the samples, micro porous can be produced and thermal conductivity can be reduced.