| 引用本文: | 罗旭东,谢志鹏,张国栋,田丰硕,陈莉莉.氧化钛对方镁石-尖晶石制品烧结及热膨胀性能的影响[J].材料科学与工艺,2014,22(5):36-41.DOI:10.11951/j.issn.1005-0299.20140507. |
| LUO Xudong,XIE Zhipeng,ZHANG Guodong,TIAN Fengshuo,CHEN Lili.Influence of titania on sintering and thermal expansion property of periclase-spinel unfired product[J].Materials Science and Technology,2014,22(5):36-41.DOI:10.11951/j.issn.1005-0299.20140507. |
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| 氧化钛对方镁石-尖晶石制品烧结及热膨胀性能的影响 |
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罗旭东1,2,谢志鹏2,张国栋1,田丰硕1,陈莉莉3
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(1.辽宁科技大学 高温材料与镁资源学院,辽宁 鞍山 114051;2.清华大学 材料科学与工程系 新型陶瓷与精细工艺国家重点实验室,北京 100084;3.鞍山市正大炉料有限公司,辽宁 鞍山 114225)
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| 摘要: |
| 为保证方镁石-尖晶石制品性能安全稳定,以电熔镁砂、高纯镁砂、a-氧化铝微粉和氧化铬微粉为主要原料,研究分析添加剂氧化钛对方镁石-尖晶石免烧成制品常温性能、烧结性能以及热膨胀性的影响.研究表明:添加剂氧化钛可以降低方镁石-尖晶石免烧成制品中尖晶石原位反应的开始温度,促进方镁石-尖晶石免烧成制品的固相反应烧结,烧结产生的体积收缩削弱了方镁石-尖晶石制品中尖晶石原位反应在1 100~1 300 ℃的过度体积膨胀.适量引入氧化钛有利于提高方镁石-尖晶石免烧成制品的热震稳定性,当氧化钛加入量为4%时,方镁石-尖晶石免烧成制品热震前后试样常温耐压强度保持率最高. |
| 关键词: 氧化钛 方镁石-尖晶石免烧成制品 线膨胀系数 热震稳定性 |
| DOI：10.11951/j.issn.1005-0299.20140507 |
| 分类号:TQ175 |
| 基金项目:国家"十二五"科技支撑计划资助项目(2012BAB06B00). |
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| Influence of titania on sintering and thermal expansion property of periclase-spinel unfired product |
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LUO Xudong1,2,XIE Zhipeng2,ZHANG Guodong1,TIAN Fengshuo1,CHEN Lili3
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(1.Department of High Temperature Materials and Magnesium Resource Engineering,Liaoning University of Science and Technology, Anshan 114051,China;2.State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;3.ZhengDa Metallurgy Furnace Charge Co., Ltd., Anshan 114225,China)
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| Abstract: |
| To ensure the safe and stable performance of periclase-spinel, using fused magnesia, high-purity magnesia, a-Al2O3 and Cr2O3 micro powder as the major raw materials, the effect of titania on the normal temperature performance, sintering property and thermal expansion property of periclase-spinel unfired product were investigated. The conclusions are that the starting temperature of in situ spinel reaction in the periclase-spinel unfired product could be reduced by additve titania. The sintering property of solid reaction was promoted. Excessive volume expansion between 1 100~1 300 ℃ could be reduced by volume contraction that was caused by reaction sintering in the periclase-spinel unfired product. The appropriate amount of titania would help to improve the thermal shock resistance of periclase-spinel unfired product. The retention rate of the compressive strength before and after thermal shock would be the best of all when the formula was added with 4% titania. |
| Key words: titania pericalse-spinel unfired product linear expansion coefficient thermal shock resistance |
