Transparent Lu3NbO7 bodies prepared by reactive spark plasma sintering and their optical and mechanical properties
Transparent Lu3NbO7 bodies prepared by reactive spark plasma sintering and their optical and mechanical properties
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DOI：
10.1016/j.ceramint.2012.06.038
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发表时间：
2013
影响因子：
5.2
通讯作者：
L. An;A. Ito;T. Goto
中科院分区：
文献类型：
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作者：
L. An;A. Ito;T. Goto
以铌酸镥和nb2o5粉末为原料，采用火花反应等离子烧结法制备了透明铌酸镥（Lu3NbO7）体。在1300 ~ 1650℃得到密度大于理论密度99.5%的全致密lu3nbo7体。在1200 ~ 1450℃，随着烧结温度的升高，晶粒从0.1 μm稳步长大到0.6μm，在1550 ~ 1650℃，晶粒从2.2 μm显著长大到9.2μm。1450℃烧结的lu3nbo7体在850℃空气中热处理6h后，在550nm处透光率最高，达到63%。全致密、亚微米尺寸的透明lu3nbo7的维氏硬度为~ 13.0GPa，压痕断裂韧性为1.0 mpam /2。
Transparent lutetium niobate (Lu3NbO7) bodies were prepared by reactive spark plasma sintering using Lu2O3and Nb2O5powders. Fully dense Lu3NbO7bodies with density greater than 99.5% of the theoretical were obtained at 1300–1650°C. The grains steadily grew from 0.1 to 0.6μm with increasing sintering temperature from 1200 to 1450°C and significant grain growth from 2.2 to 9.2μm occurred at 1550–1650°C. The Lu3NbO7body sintered at 1450°C showed the highest transmittance of 63% at 550nm after heat treatment at 850°C in air for 6h. Fully dense, submicron-size transparent Lu3NbO7exhibited Vickers hardness of ∼13.0GPa and indentation fracture toughness of 1.0MPam1/2.