高强低导热氧化铝轻质隔热材料的制备及性能研究

发布时间：2018-05-18 04:33

  本文选题：轻质隔热材料 + 氧化铝　； 参考：《武汉科技大学》2015年硕士论文

【摘要】：工业炉窑的节能一直是冶金、机械、化工等耗能大户亟需解决的重要问题,采用体积密度小、导热系数低的轻质隔热材料作炉衬是解决这个问题的有效途径之一。氧化铝轻质隔热材料具有强度高、耐酸碱侵蚀、使用温度高等特点,是高温炉窑炉衬材料理想的选择之一。目前工业上使用的氧化铝轻质隔热材料主要为氧化铝空心球制品,存在耗能、体积密度和热导率偏大等缺点。高强低导热氧化铝轻质材料的研究显得十分重要。本论文主要采用了两种方法制备氧化铝轻质材料,探讨了工艺参数对其结构号性能的影响。研究内容主要有两方面：(1)以二步法制备氧化铝轻质隔热材料,研究了原料配比、成型压力、造孔剂添加量和烧成温度对氧化铝轻质隔热材料结构与性能的影响；(2)以泡沫浇注法制备氧化铝轻质隔热材料,研究了氧化铝微粉、硅微粉和泡沫加入量以及烧成温度对氧化铝轻质隔热材料结构与性能的影响。结果表明：(1)在二步法中,当加入15wt%的α-Al2O3微粉、35wt%的造孔剂,成型压力为1OMPa、烧成温度为1550℃时,制备的氧化铝轻质隔热材料性能最佳,其常温耐压强度为1.54MPa,热导率为0.17W/(m-K)(300℃),体积密度为0.94g/cm3。(2)在泡沫浇注法中,当加入30wt%的氧化铝微粉、2wt%的硅微粉、600mL/kg的泡沫,烧成温度为1600℃时,制备的氧化铝轻质隔热材料性能最佳,其常温耐压强度为22.6MPa,热导率为0.29 W/(m·K)(300℃),体积密度为1.05g/cm3。
[Abstract]:Energy saving in industrial furnaces has always been an important problem which needs to be solved by large energy-consuming households such as metallurgy, machinery and chemical industry. The use of light heat insulation materials with small volume density and low thermal conductivity as lining is one of the effective ways to solve this problem. Alumina light heat insulation material is one of the ideal materials for high temperature furnace because of its high strength, high resistance to acid and alkali erosion and high temperature. At present, aluminum oxide is mainly used as aluminum oxide hollow ball, which has the disadvantages of energy consumption, bulk density and thermal conductivity. It is very important to study the high strength and low thermal conductivity alumina light material. In this paper, two methods were used to prepare alumina lightweight material, and the effect of process parameters on its structure number properties was discussed. The main contents of the study are two aspects: (1) preparing aluminum oxide light heat insulation material by two-step method, studying the ratio of raw materials and molding pressure. Effect of pore-making agent and sintering temperature on the structure and properties of alumina light heat insulation material Effects of addition of silica powder, foam and sintering temperature on the structure and properties of alumina light heat insulation material. The results show that in the two-step method, when 15 wt% 伪 -Al 2O 3 powder 35 wt% pore-forming agent is added, the molding pressure is 1 OMPa, the sintering temperature is 1550 鈩，

本文编号：1904403