| 氧化钇对氧化镁陶瓷烧结和抗热震性能的影响 |
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| 引用本文： | 薛宗伟,吴锋,李志坚,李心慰,栾旭,罗旭东,徐若梦. 氧化钇对氧化镁陶瓷烧结和抗热震性能的影响[J]. 耐火材料, 2019, 0(2): 96-100 |
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| 作者姓名： | 薛宗伟 吴锋 李志坚 李心慰 栾旭 罗旭东 徐若梦 |
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| 作者单位： | 辽宁科技大学高温材料与镁资源工程学院;沈阳广播电视大学 |
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| 基金项目： | 国家自然科学基金面上项目(51772139) |
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| 摘 要： | 为提高氧化镁陶瓷抗热震性和烧结性能,以高纯纳米氧化镁为主要原料,高纯纳米氧化钇粉为添加剂,聚乙烯醇为结合剂,制备了氧化镁陶瓷试样,研究了氧化钇添加量(外加,质量分数分别为0、1%、2%、3%和4%)和煅烧温度(1 350、1 450和1 550℃)对氧化镁陶瓷性能的影响。结果表明:氧化钇与方镁石形成有限置换型固溶体,提高了烧结试样致密度;氧化钇抑制了烧结试样中方镁石晶粒生长;氧化钇通过第二相增韧和微裂纹增韧提高了氧化镁陶瓷的抗热震性。
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| 关 键 词： | 氧化镁陶瓷 第二相 微裂纹 抗热震性 烧结性能 |
Effects of yttrium oxide on sintering and thermal shock resistance of magnesia ceramics |
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| Xue Zongwei,Wu Feng,Li Zhijian,Li Xinwei,Luan Xu,Luo Xudong,Xu Ruomeng. Effects of yttrium oxide on sintering and thermal shock resistance of magnesia ceramics[J]. Refractories, 2019, 0(2): 96-100 |
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| Authors: | Xue Zongwei Wu Feng Li Zhijian Li Xinwei Luan Xu Luo Xudong Xu Ruomeng |
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| Affiliation: | (School of High Temperature Materials and Magnesium Resources Engineering,University of Science and Technology Liaoning,Anshan 114051,Liaoning,China) |
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| Abstract: | Magnesia ceramic specimens were prepared with high-purity nano-sized magnesia as the main raw material,high-purity nano-sized yttrium oxide as the additive,polyvinyl alcohol as the binder in order to improve the sintering property and thermal shock resistance of magnesia ceramics.The effects of the yttrium oxide addition(0,1%,2%,3%and 4%,by mass,extra-adding)and the calcining temperature(1 350,1 450 and 1 550℃)on the properties of magnesia ceramics were investigated.The results show that the yttrium oxide forms finite substitutional solid solution with periclase,which improves the density of the sintered specimens;yttrium oxide inhibits the periclase grain growth of specimens;the thermal shock resistance of magnesia ceramics is improved by second phase toughening mechanism and microcrack toughening mechanism. |
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| Keywords: | magnesia ceramics second phase microcracks thermal shock resistance sintering property |
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