Densification behavior and properties of alumina–chrome ceramics: Effect of TiO2
Densification behavior and properties of alumina–chrome ceramics: Effect of TiO2
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DOI：
10.1016/j.ceramint.2012.06.013
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发表时间：
2013
影响因子：
5.2
通讯作者：
M. Nath;S. Sen;K. Banerjee;A. Ghosh;H. S. Tripathi
中科院分区：
文献类型：
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作者：
M. Nath;S. Sen;K. Banerjee;A. Ghosh;H. S. Tripathi
高密度低孔隙率的铝铬体通常用作耐腐蚀和耐热的耐火材料。以化学级水合氧化铝和氧化铬为原料，采用常规烧结法制备了摩尔比为1:1的铝铬复合耐火材料。在1000 ~ 1700℃的温度范围内对物料进行研磨、等静压和烧结，最高温度浸泡2h。用x射线衍射研究了烧结材料的物相随温度的变化。烧结温度、烧结条件和助烧剂（TiO2）的加入对铝铬耐火材料的致密化有很大影响。在1500℃还原气氛下，制备了致密的几乎为零孔隙率的铝铬耐火材料。测定了烧结材料在室温和1200℃下的抗弯强度。1wt%的tio2在致密化和抗弯强度方面达到最佳效果。
Highly dense alumina–chrome bodies with low porosity are usually used as corrosion and thermal resistant refractories. Alumina–chrome refractory with molar ratio 1:1 was developed using chemical grade hydrated alumina and chromium (III) oxide by conventional sintering route. Batch materials were attrition milled, isostatically pressed and sintered in the temperature range from 1000°C to 1700°C with 2h soaking at peak temperature. Phase development of the sintered materials with temperature was studied by X-ray diffraction. Sintering temperature, sintering condition and addition of sintering aid (TiO2) have immense effect on the densification of the alumina–chrome refractory. Highly dense alumina–chrome refractory with almost nil apparent porosity was developed at 1500°C in reducing atmosphere. Flexural strength of the sintered materials at room temperature and at 1200°C was also measured. 1wt% TiO2gives the optimum result with respect to densification and flexural strength.