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首页> 外文期刊>Journal of Crystal Growth >The hydrothermal synthesis, solubility and crystal growth of YVO_4 and Nd:YVO_4
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The hydrothermal synthesis, solubility and crystal growth of YVO_4 and Nd:YVO_4

机译：YVO_4和Nd：YVO_4的水热合成，溶解度和晶体生长

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摘要

In this paper we report the synthesis, solubility and growth of large YVO_4 and Nd:YVO_4 transparent single crystals in aqueous NaOH under hydrothermal conditions. YVO_4 crystals formed from hydrothermal spontaneous nucleation by (1) reaction of Y_2O_3 and V_2O_5, (2) reaction of Y_2O_3 and Na_3VO_4 or (3) recrystallization of Czochralski-grown YVO_4. Crystals synthesized by these hydrothermal methods were of good quality, exhibiting no signs of vanadium reduction. YVO_4 was found to have a positive solubility coefficient from 375 to 500 ℃ in 2-6 M NaOH, as well as a positive dependence on mineralizer concentration. Single crystals of YVO_4 and Nd:YVO_4 were grown on YVO_4 seeds using 2 M NaOH as a mineralizer and exhibited the expected tetragonal morphology. Growth rates between 0.097 and 0.13 mm/day were observed. Nd:YVO_4 growth using temperatures of 450 ℃ in the dissolution zone and 410 ℃ in the growth zone produced a crystal 15×15×7 mm~3 in size after a 4-week growth period.
机译：在本文中，我们报告了在水热条件下，大型YVO_4和Nd：YVO_4透明单晶在NaOH水溶液中的合成，溶解度和生长。通过（1）Y_2O_3与V_2O_5的反应，（2）Y_2O_3与Na_3VO_4的反应或（3）切克劳斯基生长的YVO_4的重结晶，水热自发成核形成YVO_4晶体。通过这些水热法合成的晶体具有良好的品质，没有钒还原的迹象。在2-6 M NaOH中，YVO_4在375至500℃范围内具有正溶解系数，并且对矿化剂浓度具有正依赖性。使用2 M NaOH作为矿化剂，在YVO_4种子上生长YVO_4和Nd：YVO_4的单晶，并表现出预期的四边形形态。观察到的生长速率在0.097至0.13 mm /天之间。 Nd：YVO_4在溶解区温度为450℃，生长区温度为410℃下生长，经过4周的生长，生成了15×15×7 mm〜3的晶体。

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