提拉法生长立方相KTa_(1-x)Nb_xO_3晶体  

Cubic KTa_(1-x)Nb_xO_3 Crystal Growth by Czochraski Method

作　　者：王旭平[1] 王继扬[1] 于永贵[1] 李静[1] 张建秀[1] 赵洪阳[1] 

机构地区：[1]山东大学晶体材料国家重点实验室,山东济南250100

出　　处：《稀有金属》2006年第6期841-845,共5页Chinese Journal of Rare Metals

基　　金：国家973项目(2004CB619002)资助

摘　　要：报道了用提拉法在KNbO3-KTaO3固熔体体系中生长立方相KTa1-xNbxO3晶体。实验采用两种不同的原始配料生长晶体:即生长组分分别为KNbO3∶KTaO3(摩尔分数)=0.35∶0.65和0.45∶0.55,分别得到x=0.14和0.19的KTN晶体,晶体尺寸可达厘米级。分析了晶体的形态特征和宏观缺陷并讨论了各种缺陷的形成机制;利用JXA-8800电子探针技术测定了晶体组分;讨论了影响晶体生长的多种条件,发现温场和提拉速度是影响KTN晶体生长和质量的主要因素。Cubic KTa1-xNb2O3 single crystals were grown by Czochraski method in KNbO3-KTaO3 solid solution system. The ratios of raw materials KNbO3 ： KTaO3（mol ratio） are 0.35：0.65 and 0.45：0.55, and KTa1-NbxO3 crystals in which x = 0.14 and x = 0.19 were obtained respectively. The three-dimensional sizes of the crystal can all reach 1 cm. Conditions that affect crystal growth were discussed in detail. The results show that temperature field and pulling rate are the main factors that influence crystal growth and crystal quality.

关 键 词：钽铌酸钾 晶体生长 提拉法 

分 类 号：Q436.4[生物学—生理学]