粉煤灰回收制备低成本多孔莫来石陶瓷

A. Yadav, S. Patel, S. Bhattacharyya
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引用次数: 2

摘要

以铝土矿和粉煤灰为原料,制备了低成本的多孔莫来石陶瓷。制备的多孔莫来石陶瓷保持80%铝土矿和20%粉煤灰的成分。对压实后的样品在1300℃、1400℃、1450℃和1500℃四种不同温度下进行热处理,研究莫来石相的形成。XRD分析证实,在1400℃及以上温度下,莫来石形成为主要相。在1450℃以下,随着烧结温度的升高,孔隙率增大,线收缩率减小,密度减小。1450°C后出现正常趋势。FESEM显微结构显示,合金中存在分布的气孔、车床形莫来石晶粒和玻璃相。对多孔莫来石陶瓷的抗折强度进行了研究,以确定其力学稳定性。以铝土矿和粉煤灰为原料,制备了低成本的多孔莫来石陶瓷。制备的多孔莫来石陶瓷保持80%铝土矿和20%粉煤灰的成分。对压实后的样品在1300℃、1400℃、1450℃和1500℃四种不同温度下进行热处理,研究莫来石相的形成。XRD分析证实,在1400℃及以上温度下,莫来石形成为主要相。在1450℃以下,随着烧结温度的升高,孔隙率增大,线收缩率减小,密度减小。1450°C后出现正常趋势。FESEM显微结构显示,合金中存在分布的气孔、车床形莫来石晶粒和玻璃相。对多孔莫来石陶瓷的抗折强度进行了研究,以确定其力学稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Preparation of low-cost porous mullite ceramics by recycling fly ash
Low-cost porous mullite ceramic was prepared by using bauxite and fly ash as raw material. The porous mullite ceramic was fabricated maintaining 80% bauxite and 20% fly ash composition. Compacted samples were heat treated at four different temperature 1300°C, 1400°C, 1450°C and 1500°C to study the formation of mullite phase. XRD analysis confirmedthe formation of mullite as a major phase at 1400°C and above. It was found that with an increase in the firing temperature up to 1450°C porosity increases, linear shrinkage decreases and density decreases. After 1450°C normal trend was noticed. FESEM microstructure showed the presence ofdistributed pores, lathe-shaped mullite grains, and the glassy phase. The flexural strength was also investigated to find out the mechanical stability of the porous mullite ceramics.Low-cost porous mullite ceramic was prepared by using bauxite and fly ash as raw material. The porous mullite ceramic was fabricated maintaining 80% bauxite and 20% fly ash composition. Compacted samples were heat treated at four different temperature 1300°C, 1400°C, 1450°C and 1500°C to study the formation of mullite phase. XRD analysis confirmedthe formation of mullite as a major phase at 1400°C and above. It was found that with an increase in the firing temperature up to 1450°C porosity increases, linear shrinkage decreases and density decreases. After 1450°C normal trend was noticed. FESEM microstructure showed the presence ofdistributed pores, lathe-shaped mullite grains, and the glassy phase. The flexural strength was also investigated to find out the mechanical stability of the porous mullite ceramics.
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