固相法制备Al2(WO4)3粉体及其负热膨胀性能
Preparation of Al2(WO4)3 Powders with Negative Thermal Expansion Performance by Solid Phase Reaction
摘 要
以Al2O3和WO3为原料,采用固相反应法制备了负热膨胀性能的Al2(WO4)3粉体.用X射线粉末衍射和扫描电镜分别对粉体进行物相、晶体结构分析和形貌观察;通过热重-差热分析了粉体的热性能;采用热膨胀仪测定了热膨胀系数.结果表明:产物为高纯度正交晶系结构的Al2(WO4)3,形状规则,大小均匀,平均尺寸为0.6 μm×0.4 μm.从室温到熔点范围内,Al2(WO4)3粉体无相变,不发生分解,30~900 ℃的平均热膨胀系数为-1.56×10-6 K-1.
Al2(WO4)3
固相反应法
negative thermal expansion
Al2(WO4)3
solid phase reaction
Abstract
Negative thermal expansion material Al2(WO4)3 powders were prepared by solid state reaction using aluminum oxide and tungsten trioxide as raw materials.The phase,crystal structure and morphology of the powders were characterized by powder X-ray diffraction(XRD)and scanning electron microscopy(SEM)respectively.The thermodynamic property of the powders was characterized by thermo gravimetric and differential thermal analysis(TG-DTA).The thermal expansion coefficients of Al2(WO4)3 powders were measured by thermal dilatometer.The results show that the sample is Al2(WO4)3 with high purity and orthorhombic structure.The particles have regular morphology and the size distribution is homogeneous,which is 0.6 μm×0.4 μm averagely.The powders have no phase transition and decomposition in the temperature range from room-temperature to the melting point.The average thermal expansion coefficient of the powders is -1.56×10-6 K-1 in the temperature range of 30-900 ℃.
中图分类号 O614
所属栏目
基金项目 国家自然科学基金资助项目(50442023);江苏省自然科学基金资助项目(BK2003404)
收稿日期 2006/9/4
修改稿日期 2006/12/12
网络出版日期
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备注屈展(1980-),男,江苏常熟人,硕士研究生.
引用该论文: QU Zhan,YANG Xin-bo,CHENG Xiao-nong. Preparation of Al2(WO4)3 Powders with Negative Thermal Expansion Performance by Solid Phase Reaction[J]. Materials for mechancial engineering, 2007, 31(7): 19～21
屈展,杨新波,程晓农. 固相法制备Al2(WO4)3粉体及其负热膨胀性能[J]. 机械工程材料, 2007, 31(7): 19～21
被引情况:
【1】孙秀娟,程晓农,杨娟,刘芹芹, "不同酸催化溶胶-凝胶法制备负热膨胀ZrW2O8粉体及其性能",机械工程材料 40, 42-46(2016)
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参考文献
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【2】Mary T A,Evans J S O,Sleight A W,et al.Negative thermal expansion from 0.3 to 1 050 K in ZrW2O8[J].Science,1996,272:90-92.
【3】Evans J S O,Hu Z,Jorgensen J D,et al.Compressibility,phase transitions,and oxygen migration in zirconium tungstate ZrW2O8[J].Science,1996,275:61-65.
【4】Perottoni C A,Jornada J A da.Pressure induced amorphization and negative thermal expansion in ZrW2O8[J].Science,1998,280:886-889.
【5】Ernst G,Broholm C,Kowach C R,et al.Phonon density of states and negative thermal expansion in ZrW2O8[J].Nature,1998,396:147-149.
【6】Evans J S O,Mary T A,Sleight A W,et al.Negative thermal expansion materials[J].J Chem Soc Dalton Trans,1999,19:3317-3326.
【7】Achary S N,Mukherjee G D,Tyagi A K,et al.Preparation,thermal expansion,high pressure and high temperature behavior of Al2(WO4)3[J].Journal of Materials Science,2002,37:2501-2509.
【8】Imanaka N,Tamura S,Hiraiwa M,et al.Trivalent aluminum on conducting characteristics in Al2(MO4)3 single crystals[J].Chem Mater,1998,10(9):2542-2545.
【9】Kohler J,Imanaka N.New action conducting solid electrolytes with the Sc2(WO4)3 type structure[J].J Materials Chemistry,1999,9:1357-1362.
【10】Yang Xinbo,Cheng Xiaonong,Yan Xuehua,et al.Synthesis of ZrO2/ZrW2O8 composites with low thermal expansion[J].Composities Science & Technology,2007,67(6):1167-1171.
【11】Levin E M,Robin C R,Mcmurdie H F.Phase diagrams for ceramist[M].USA:The Am Ceramic Soc,1969:2350.
【12】罗静卿,赵新华,周固.微乳液法制备纳米Al2(WO4)3[J].北京师范大学学报(自然科学版),2004,40(5):655-659.
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