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Chloride Flux Growth of Idiomorphic AWO4 (A = Sr, Ba) Single Microcrystals
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2018-07-24 00:00:00 , DOI: 10.1021/acs.cgd.8b00757 Kenta Kawashima , Jun-Hyuk Kim , Isabelle Cheng , Kunio Yubuta 1 , Kihyun Shin , Yang Liu 2 , Jie Lin 3 , Graeme Henkelman , C. Buddie Mullins
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2018-07-24 00:00:00 , DOI: 10.1021/acs.cgd.8b00757 Kenta Kawashima , Jun-Hyuk Kim , Isabelle Cheng , Kunio Yubuta 1 , Kihyun Shin , Yang Liu 2 , Jie Lin 3 , Graeme Henkelman , C. Buddie Mullins
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Scheelite-type divalent metal tungstate materials (AWO4) have been studied for various applications due to their attractive mechanical and chemical properties. Preparation of the shape-controlled AWO4 crystals with high crystallinity is one of the most effective approaches for further exploring and improving their properties. In this study, highly crystalline SrWO4 and BaWO4 microcrystals with different morphologies were grown by using a chloride flux growth technique. To investigate the effect of growth conditions on SrWO4 and BaWO4 crystals, NaCl and KCl were used as a flux, and the solute concentration was adjusted in the range of 5–50 mol %. The difference in the flux cation species (Na+ and K+) mainly affected the crystal size. In accordance with increasing the solute concentration, the dominant crystal shape of SrWO4 and BaWO4 varied as follows: whisker (a rod- or wire-like morphology with a large aspect ratio) → platelet → well/less-faceted polyhedron. Additionally, according to scanning electron microscopy and transmission electron microscopy results, a dendritic morphological transformation from AWO4 whisker to platelet during crystal growth has been proposed.
中文翻译：
亚晶型A WO 4（A = Sr，Ba）单微晶的氯离子通量生长
白钨矿型二价金属钨酸盐材料（A WO 4）由于其吸引人的机械和化学性质而被研究用于各种应用。具有高结晶度的形状受控的A WO 4晶体的制备是进一步探索和改善其性能的最有效方法之一。在这项研究中，高结晶SrWO 4和钨酸钡4微晶不同形貌通过使用氯化物助熔剂生长法生长。为了探讨SrWO的生长条件的影响4和钨酸钡4用NaCl和KCl晶体作为助熔剂，溶质浓度调节在5-50 mol％的范围内。助焊剂阳离子种类（Na +和K +）的差异主要影响晶体尺寸。按照增加溶质浓度，SrWO的主导晶体形状4和钨酸钡4如下变化：晶须（一个棒状或线状具有大纵横比的形态）→血小板→阱/方位少多面体。另外，根据扫描电子显微镜和透射电子显微镜的结果，提出了在晶体生长期间从A WO 4晶须向血小板的树突形态转变。
更新日期：2018-07-24
中文翻译：
亚晶型A WO 4（A = Sr，Ba）单微晶的氯离子通量生长
白钨矿型二价金属钨酸盐材料（A WO 4）由于其吸引人的机械和化学性质而被研究用于各种应用。具有高结晶度的形状受控的A WO 4晶体的制备是进一步探索和改善其性能的最有效方法之一。在这项研究中，高结晶SrWO 4和钨酸钡4微晶不同形貌通过使用氯化物助熔剂生长法生长。为了探讨SrWO的生长条件的影响4和钨酸钡4用NaCl和KCl晶体作为助熔剂，溶质浓度调节在5-50 mol％的范围内。助焊剂阳离子种类（Na +和K +）的差异主要影响晶体尺寸。按照增加溶质浓度，SrWO的主导晶体形状4和钨酸钡4如下变化：晶须（一个棒状或线状具有大纵横比的形态）→血小板→阱/方位少多面体。另外，根据扫描电子显微镜和透射电子显微镜的结果，提出了在晶体生长期间从A WO 4晶须向血小板的树突形态转变。
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