耐火材料 ›› 2022, Vol. 56 ›› Issue (4): 339-341.DOI: 10.3969/j.issn.1001-1935.2022.04.014

• 生产应用 • 上一篇    下一篇

氧化锆添加量对镁质材料性能的影响

高永军1), 吴锋1), 李心慰1), 苏玉玺1), 冯雨1)罗旭东1), 陈卫敏2), 王琼3)   

  1. 1)辽宁科技大学 材料与冶金学院 辽宁鞍山 114051
    2)郑州瑞泰耐火科技有限公司 河南郑州 452374
    3)鞍山市和丰耐火材料有限公司 辽宁海城 114225
  • 收稿日期:2021-09-14 出版日期:2022-08-15 发布日期:2022-11-09
  • 作者简介:高永军:男,1992年生,硕士研究生。E-mail:1149004405@qq.com
  • 基金资助:
    菱镁矿特色资源高效利用制备高性能耐火材料相关基础研究项目(U1908227)。

Effect of zirconia addition on properties of magnesia refractories

Gao Yongjun, Wu Feng, Li Xinwei, Su Yuxi, Feng Yu, Luo Xudong, Chen Weimin, Wang Qiong   

  1. School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,Liaoning,China
  • Received:2021-09-14 Online:2022-08-15 Published:2022-11-09

摘要: 将岫岩二级菱镁矿在900 ℃保温3 h制成≤0.074 mm的轻烧氧化镁粉,再加入不同量(质量分数分别为0、4%、8%、12%、16%)的脱硅锆,经研磨混合、成型、烘干后,分别在1 500、1 600、1 700 ℃保温3 h煅烧,检测烧后试样的体积密度、相对密度、常温耐压强度、抗热震性,并分析试样的物相组成和显微结构。结果表明:随着脱硅锆添加量的增加,烧后试样的相对密度、常温耐压强度和抗热震性基本上都呈先增大后减小的变化趋势,在添加8%(w)脱硅锆时达到最大;添加8%(w)的脱硅锆,在1 700 ℃保温3 h烧结,所得材料的相对密度达到86.21%,常温耐压强度为201 MPa,抗热震性达到6次。

关键词: 氧化锆, 菱镁矿, 镁质耐火材料, 烧结性能, 抗热震性

Abstract: Light burned magnesia powder (≤0.074 mm) was prepared with Xiuyan grade Ⅱ magnesite firing at 900 ℃ for 3 h.Samples were prepared by the obtained powder and desiliconized zirconia with different additions (0,4%,8%,12% and 16%,by mass),grinding,mixing,forming,drying,and calcining at 1 500,1 600 and 1 700 ℃ for 3 h,respectively.The bulk density,the relative density,the cold compressive strength and the thermal shock resistance of the fired samples were tested.The phase composition and the microstructure were analyzed.The results show that the cold compressive strength,the relative density and the thermal shock resistance of the samples basically increase first and then decrease with the increase of the desiliconized zirconia addition,achieving the maximum with 8% desiliconized zirconia.The sample added with 8% desiliconized zirconia and sintered at 1 700 ℃ for 3 h has the relative density of 86.21%,the cold compressive strength of 201 MPa and the thermal shock resistance of 6 cycles.

Key words: zirconia, magnesite, magnesia refractories, sintering properties, thermal shock resistance

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