不同掺杂对Ba3Y(BO3)3晶体的生长和相变的影响  

Effects of Different Dopants on the Growth and Phase Transition of Ba_3Y(BO_3)_3 Crystal

作　　者：潘尚可[1] 陆晟[1] 丁栋舟[1] 杨帆[1] 任国浩[1] 王国富[2] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海201800 [2]中国科学院福建物质结构研究所,福州350002

出　　处：《无机材料学报》2009年第3期567-570,共4页Journal of Inorganic Materials

基　　金：国家自然科学基金(60508007);中国科学院上海硅酸盐所创新项目(SCX200708)

摘　　要：结合X射线粉末衍射和差示扫描量热法,系统研究了不同格位上的掺杂对Ba3Y(BO3)3晶体的生长和相变的影响.研究发现,相同掺杂浓度10at%时,掺Nd3+的α-Ba3Y(BO3)3晶体的相变温度(1099.6℃)比掺Yb3+的晶体的相变温度(1145.3℃)低;且随着掺Nd3+浓度的降低,晶体的相变温度升高,晶体在降温过程中更容易发生相变.在晶体中掺入Sr2+离子,可以有效提高Yb3+∶α-Ba3Y(BO3)3晶体的稳定性.随着Sr2+掺入浓度的增加,晶体的熔点升高,相变温度降低.当Sr2+掺杂浓度为16at%时,晶体的相变峰消失;当Sr2+掺杂浓度分别为5at%、10at%时,晶体仍然发生相变.Phase transition is harmful to the quality of Re doped Ba3 Y （ BO3 ） 3 crystals. In order to obtain high quality Yb3 ＋ α-Ba3Y（ BO3 ）3 crystal, Sr2＋ ions co-doped yb3＋ ： α-Ba3 Y（BO3 ）3 crystal was grown with CZ method. Effect of various dopants and substitution sites on the growth and phase transition of Ba3 Y（ BOa ） 3 crystal were investigated. The phase transition temperature of 10at% Nd3 ＋ ： α-Ba3Y （ BO3 ） 3 crystal is 1099.6 ℃, which is lower than that of 10at% Yb3＋ ： α-Ba3 Y （ BOa ）3 crystal （ 1145.3 ℃ ）. Furthermore, the phase transition temperature of Nd3＋：α-BaaY（BO3 ）3 crystals is increased with the increase of the contentration of Nd3＋ ions. For 10at% yb3＋ ： α-Ba3Y（ BO3 ）2 crystal, the melting point is increased and the phase transition temperature is decreased with the increase of the concentration of the co-doped Sr2＋ ions. The endothermic peak of phase transition disappears when the concentration of Sr2＋ ions reaches 16at% , yet phase transition still exists with Sr2＋ concentration of 5at% or 10at%.

关 键 词：激光晶体 相变 晶体稳定性 提拉法 硼酸盐 

分 类 号：O736[理学—晶体学]