钛铁渣矿相重构制备CaO·6Al2O3-Al2O3复相陶瓷

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (11): 4119-4129.

钛铁渣矿相重构制备CaO·6Al₂O₃-Al₂O₃复相陶瓷

胡开文, 王颖, 李成卓, 邓腾飞

武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070

收稿日期:2024-04-18 修订日期:2024-06-05 出版日期:2024-11-15 发布日期:2024-11-21
通信作者: 邓腾飞,博士,教授。E-mail:dengtf@whut.edu.cn
作者简介:胡开文(1975—),男,高级实验师。主要从事玻璃陶瓷制备技术的研究。E-mail:hkw@whut.edu.cn
基金资助:
国家重点研发计划(2019YFC1904900)

Preparation of CaO·6Al₂O₃-Al₂O₃ Composite Ceramics by Ferrotitanium Slag Phase Reconstruction

HU Kaiwen, WANG Ying, LI Chengzhuo, DENG Tengfei

State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

Received:2024-04-18 Revised:2024-06-05 Published:2024-11-15 Online:2024-11-21

摘要/Abstract

摘要： 本研究通过钛铁渣与氧化铝(Al₂O₃)共烧,制备了Al₂O₃-六铝酸钙(CA₆)复相陶瓷。CA₆经钛铁渣矿相重构形成,具有长板状形貌,与Al₂O₃有良好的匹配性,被作为陶瓷的增韧相。通过调控配方组成及烧结温度,揭示了CA₆含量和烧结温度对Al₂O₃-CA₆复相陶瓷的性能与微观结构的影响规律。随着CA₆含量的提高,陶瓷样品的体积密度、抗弯强度和断裂韧性均呈下降趋势;随着温度提高,陶瓷样品的体积密度和抗弯强度先升高后降低。最终在1 320 ℃下烧结得到分别含有90%(质量分数)Al₂O₃和85%(质量分数)Al₂O₃的两组样品的体积密度、表观气孔率、抗折强度和断裂韧性分别为3.79 g/cm³、0.22%、(385.01±21.67) MPa、(5.33±0.21) MPa·m^1/2,3.69 g/cm³、0.12%、(371.22±9.65) MPa、(4.94±0.08) MPa·m^1/2。研究成果对钛铁渣的资源化利用具有重要意义。

关键词: 复相陶瓷, 氧化铝, 钛铁渣, 六铝酸钙, 增韧

Abstract: The present study focus on the preparation of Al₂O₃-CA₆ composite ceramics by co-firing ferrotitanium slag with Al₂O₃. CA₆ was formed through the reconstruction of ferrotitanium slag phase, with a long plate-like morphology and good compatibility with Al₂O₃. CA₆ was used as a toughening phase for ceramics. This study reveals the influence of CA₆ content and sintering temperature on the properties and microstructure of Al₂O₃-CA₆ composite ceramics by regulating the formula composition and sintering temperature. With the increase of CA₆ content, the bulk density, bending strength, and fracture toughness of ceramic samples all show a decreasing trend. As the temperature increases, the bulk density and bending strength of ceramic samples increase first and then decrease. The bulk density, apparent porosity, bending strength, and fracture toughness of two sets of samples containing 90% (mass fraction) Al₂O₃ and 85% (mass fraction) Al₂O₃, respectively, are obtained by sintering at 1 320 ℃. The values are 3.79 g/cm³, 0.22%, (385.01±21.67) MPa, and (5.33±0.21) MPa·m^1/2, respectively; 3.69 g/cm³, 0.12%, (371.22±9.65) MPa, (4.94±0.08) MPa·m^1/2, the utilization rate of titanium iron slag is higher than 75%, which is of great significance for the resource utilization of titanium iron slag.

Key words: composite ceramics, alumina, ferrotitanium slag, calcium hexaaluminate, toughening

中图分类号:

TB321

胡开文, 王颖, 李成卓, 邓腾飞. 钛铁渣矿相重构制备CaO·6Al₂O₃-Al₂O₃复相陶瓷[J]. 硅酸盐通报, 2024, 43(11): 4119-4129.

HU Kaiwen, WANG Ying, LI Chengzhuo, DENG Tengfei. Preparation of CaO·6Al₂O₃-Al₂O₃ Composite Ceramics by Ferrotitanium Slag Phase Reconstruction[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(11): 4119-4129.

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钛铁渣矿相重构制备CaO·6Al₂O₃-Al₂O₃复相陶瓷

Preparation of CaO·6Al₂O₃-Al₂O₃ Composite Ceramics by Ferrotitanium Slag Phase Reconstruction

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