CRYSTAL-GROWTH OF YVO4 USING THE LHPG TECHNIQUE

被引:48
作者
ERDEI, S
AINGER, FW
机构
[1] Materials Research Laboratory, The Pennsyluania State University, University Park
关键词
D O I
10.1016/S0022-0248(07)80091-1
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
A laser heated pedestal growth (LHPG) technique utilizing a 50 W CO2 laser source was employed for the growth of YVO4. A growth method where only a small volume of the substance is melted was selected, since vanadium oxides vaporize readily at the melting point of YVO4 (1810-degrees-C). The feed and seed rods were prepared from ceramics made from different Y2O3-V2O5 compositions synthesized by both solid state and wet chemical methods. The congruent melting composition (CMC) was determined to be 49.3 mol% V2O5-50.7 mol% Y2O3. Two phases in addition to YVO4 were observed and found to be Y8V2O17 and a black crystalline YVO4-x (0 < x < 1) which can be deduced from the Y2O3-V2O5-V2O3 ternary phase diagram. The occurrence of these phases can be minimized by reducing the length of the float zone and using ceramic rods rich in V2O5.
引用
收藏
页码:1025 / 1030
页数:6
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