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首页> 外文期刊>Journal of Crystal Growth >Crystal growth of Ca_12Al_14O_33 by the floating zone method
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Crystal growth of Ca_12Al_14O_33 by the floating zone method

机译：浮区法生长Ca_12Al_14O_33的晶体

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摘要

We have grown single crystals of Ca_12Al_14O_33 (C12A7), a congruently melting compound, by the floating zone method. With the conventional method, the shape of the solid-liquid interface was concave, and many bubbles and cracks remained in the grown crystal. To reduce them, the crystal growth at a lower growth rate and the control of the shape of the solid-liquid interface were examined. For the growth rate <0.3 mm/h, the amount of bubbles was reduced considerably. However, in such a condition, a significantly large bubble was often formed in the molten zone, which disturbed the stability of the molten zone. Introducing an alumina tube as a heat reservoir at a suitable position in the heated area, the shape of the solid-liquid interface could be changed from concave to a convex one.
机译：我们已经通过浮区法生长了全熔化合物Ca_12Al_14O_33（C12A7）的单晶。在常规方法中，固液界面的形状是凹形的，并且在生长的晶体中残留有许多气泡和裂纹。为了减少它们，研究了以较低生长速率的晶体生长和固液界面形状的控制。对于＜0.3mm / h的生长速率，气泡的量大大减少。然而，在这种情况下，通常在熔融区域中形成明显大的气泡，这干扰了熔融区域的稳定性。在加热区域的适当位置引入氧化铝管作为蓄热器，固液界面的形状可以从凹形变为凸形。

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