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中文摘要：
为利用中子散射技术更好地研究铌酸锂晶体的结构缺陷，以Nb2O，和同位素的^7LiOH为原料，采用提拉法从58．5％的^7Li熔体中成功生长了近化学计量比的同位素^7LiNbO，晶体。晶体质量约为35g，室温下晶体密度为4．634g／cm^3，采用差热热重（DTA／TG）分析仪测得晶体熔点为1223℃，在室温至1250℃范围内晶体重量未发生变化。室温下晶体在500-3200nm波段平均透过率达74％，OH-吸收峰位置在2877nm，利用紫外吸收边法测得晶体中^7Li含量为49．46％。在633nm波长下，利用c切晶片，测得晶体的折射率为no=2．2872，ne=2．1909。
英文摘要：
For further investigation on the defects structure of lithium niobate crystal by neutron scattering technique, a near-stoichiometric isotope^7LiNb03 crystal was successfully grown by Czochralski method from a 58.5% ^7Li melt with raw materials of Nb205 and ^7LiOH. The weight of the as-grown crystal is about 35 g, the density at room temperature is 4.634 g/cm3, the melting point obtained from analysis of 500-3200 nm is approach to 74%, the OH- absorption peak is located at 2877 nm, and the^7Li content of the crystal judged from UV absorption edge method is 49.46%. The refractive index determined at 633 nm wavelength on c-cut slip is no =2.2872 ,ne =2. 1909.
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