添加ZrO2对CaAl4O7材料烧结的影响

材料导报

2020, Vol. 34

Issue (Z1): 144-147

无机非金属及其复合材料

添加ZrO₂对CaAl₄O₇材料烧结的影响

尹雪亮^1,2, 刘洋^1,2, 李丽颖^1,2, 宫长伟^1,2, 杜成武^1,2, 毛榜玉^1,2, 彭可武^1,2

1 辽宁科技学院冶金工程学院,本溪 117000;
2 辽宁省本溪低品位非伴生铁矿优化应用重点实验室,本溪 117000

Effect of Addition of ZrO₂ on Sintering of CaAl₄O₇ Material

YIN Xueliang^1,2, LIU Yang^1,2, LI Liying^1,2, GONG Changwei^1,2, DU Chengwu^1,2, MAO Bangyu^1,2, PENG Kewu^1,2

1 School of Metallurgy, Liaoning Institute of Science and Technology, Benxi 117000, China;
2 Liaoning Key Laboratory of Optimization and Utilization of Non-associated Low-grade Iron Ore in Benxi, Benxi 117000, China

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摘要为适应材料轻量化的发展需要,以铝土矿、石灰石粉末为主要原料,将其经1 200 ℃一步预烧2 h、1 600 ℃二步烧结1 h后,制备了CA₂材料, 并考察了添加ZrO₂对该材料烧结行为的影响。结果表明,添加的ZrO₂中的Zr⁴⁺通过取代Al³⁺固溶入CA₂相中,有效地促进了CA₂相的晶格畸变、增加了Al³⁺空位,进而有效地提高CA₂相的烧结活性,加快了烧结过程中的晶间混淆和晶间扩散,从而有效地促进了CA₂相的烧结,同时过量添加的ZrO₂相可进一步填塞气孔,促进CA₂耐火材料的烧结致密化。基于以上因素共同作用,CA₂材料的烧结致密化行为被有效促进。当ZrO₂的添加量为2%时,试样的气孔率由未添加时的12.7%下降至4.8%,体积密度由未添加时的2.51 g/cm³上升至2.63 g/cm³,可制得CA₂晶相呈交织分布、显微结构致密的CA₂材料。

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	尹雪亮
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	毛榜玉
	彭可武

关键词: CA₂ 轻量化 ZrO₂ 烧结行为显微结构

Abstract: In order to adapt the demands for the lightweight of materials, CA₂ material was prepared after the mixture powders was pre-sintering at 1 200 ℃ for 2 h and sintering at 1 600 ℃ for 1 h by addition of ZrO₂ micro powder, and the effect of ZrO₂ addition on densification behavior of the material was discussed. The results showed that the added ZrO₂ dissolved to CA₂ by substituting Al³⁺, which would effectively promote the lattice distortion of CA₂ and the increase of Al³⁺ vacancies, and then effectively improve the sintering activity of CA₂, accelerate intercrystalline mixing and diffusion in the sintering process, thus the sintering of CA₂ was effectively promoted. At the same time, the excess ZrO₂ further filled the pores and promoted the sintering densification of CA₂ material. Based on the above factors, the sintering densification behavior of CA₂ refractory was synergistically promoted. As a result, the dense microstructure was obtained, with the apparent porosity decreased from 12.7% to 4.8% and the bulk density increased from 2.51 g/cm³ to 2.63 g/cm³ after firing at 1 600 ℃ for 1 h by addition of 2% ZrO₂, and a texture microstructure of CA₂ phases was prepared.

Key words: CA₂ lightweight ZrO₂ sintering behavior microstructure

发布日期: 2020-07-01

ZTFLH:

TB35

基金资助: 辽宁省教育厅资助项目(L2019lkyjc-03;L2015275);辽宁科技学院博士启动基金(1810B04);国家级大学生创新创业训练计划项目(201911430066; 202011430079);2020年辽宁省科技厅省博士科研启动基金

作者简介: 尹雪亮,博士,辽宁科技学院讲师。主要从事耐火材料及功能陶瓷材料方面的研究工作,先后主持辽宁省教育厅资助等各类项目多项,发表论文20余篇,申报发明专利6项;彭可武,博士,辽宁科技学院副教授。主要从事陶瓷材料方面的研究工作,先后主持辽宁省教育厅资助等各类项目多项,发表论文20余篇,申报发明专利3项。

引用本文:

尹雪亮, 刘洋, 李丽颖, 宫长伟, 杜成武, 毛榜玉, 彭可武. 添加ZrO₂对CaAl₄O₇材料烧结的影响[J]. 材料导报, 2020, 34(Z1): 144-147.
YIN Xueliang, LIU Yang, LI Liying, GONG Changwei, DU Chengwu, MAO Bangyu, PENG Kewu. Effect of Addition of ZrO₂ on Sintering of CaAl₄O₇ Material. Materials Reports, 2020, 34(Z1): 144-147.

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http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2020/V34/IZ1/144

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