Form Design of Bulky Ruby Crystals with Well-Developed (112?3) Faces?Epitaxial Growth of Crystal Films on Sapphire Substrates via MoO3 Flux
Form Design of Bulky Ruby Crystals with Well-Developed (112?3) Faces?Epitaxial Growth of Crystal Films on Sapphire Substrates via MoO3 Flux
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具有发达 (112?3) 面的大块红宝石晶体的形状设计？通过 MoO3 助熔剂在蓝宝石衬底上外延生长晶体薄膜
DOI：
10.1021/acs.cgd.0c00841
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发表时间：
2020
影响因子：
3.8
通讯作者：
Teshima Katsuya
中科院分区：
文献类型：
--
作者：
Ayuzawa Shunsuke;Yamada Tetsuya;Katsuta Naoki;Suzuki Sayaka;Shiiba Hiromasa;Oishi Shuji;Teshima Katsuya
红宝石（Al2O3：Cr）是一种掺杂有铬的氧化铝（Al2O3）晶体。在此，我们报道了一个大的块状红宝石晶体生长良好的n（1123）面通过三氧化钼熔剂蒸发。在生长过程中，难以研究每个晶面的生长和溶解速率，因为生长速率慢的晶面形成，导致难以调节晶型。近年来，我们发展了一种在蓝宝石（Al_2O_3）衬底上外延生长红宝石晶体薄膜的技术。在这项研究中，我们首次量化了每个晶面红宝石晶体生长速率和蓝宝石晶体溶解速率的相对差异。结果发现，（1）每个晶面的溶解和生长速率显著不同，（2）两个参数之间没有观察到明显的正相关。基于观察到的生长和溶解速率，大块红宝石晶体可以在切割成特定形状的圆柱形蓝宝石籽晶上生长。我们的研究为有效调控晶型提供了新的见解，这是我们继续研究红宝石晶体外延生长的关键之一。
Ruby (Al2O3:Cr) is an aluminum oxide (Al2O3) crystal doped with chromium. Herein, we report the growth of a large bulky ruby crystal with well-developed n(1123) faces via molybdenum trioxide flux evaporation. It is difficult to investigate the growth and dissolution rate for each crystal face during growth because a face with a slow growth rate develops, resulting in difficulty of modulation of the crystal form. In recent years, we developed a technique to grow ruby crystal films epitaxially on sapphire (Al2O3) substrates. In this study, for the first time, we quantified the relative differences in the growth rate of a ruby crystal and the dissolution rate of a sapphirecrystal for each crystal face. As a result, it was found that (1) the dissolution and growth rates differed significantly for each crystal face, and (2) no obvious positive correlation between the two parameters was observed. Based on the observed growth and dissolution rates, the bulky ruby crystal could be grown on a cylindrical sapphire seed crystal cut into a specific shape. Our study provides new insights into effectively modulating the crystal form, which is one of the key points of our continued studies on the epitaxial growth of ruby crystals.