Growth of LiCoO2 Single Crystals by the TSFZ Method,Crystal Growth & Design

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Growth of LiCoO2 Single Crystals by the TSFZ Method
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2018-11-08 00:00:00 , DOI: 10.1021/acs.cgd.8b01503
Shigenobu Nakamura ₁ , Andrey Maljuk _{1,

2} , Yuki Maruyama ₁ , Masanori Nagao ₁ , Satoshi Watauchi ₁ , Takeshi Hayashi ₃ , Yutaka Anzai ₃ , Yasunori Furukawa ₃ , Chris D. Ling _{2,

4} , Guochu Deng ₅ , Maxim Avdeev ₅ , Bernd Büchner ₂ , Isao Tanaka ₁

Affiliation

We have grown LiCoO₂ single crystals by the traveling solvent floating zone (TSFZ) growth with Li-rich solvent, having observed the incongruent melting behavior of LiCoO₂ between 1100 and 1300 °C. The optimum growth conditions in terms of atmosphere and solvent composition were determined to be Ar flow and an atomic ratio Li/Co 85:15, respectively. The crystals grown using a conventional-mirror-type furnace contained periodic inclusions of a Co–O phase due to the influence of Co–O phase segregation on the stability of the molten zone during growth. By using a tilted-mirror FZ furnace, inclusion-free LiCoO₂ crystals of about 5 mm in diameter and 70 mm long were obtained at a tilting angle θ = 10°. The grown crystals were confirmed to be single-domain by neutron Laue diffraction.

中文翻译：

TSFZ法生长LiCoO ₂单晶

我们已经观察到LiCoO ₂在1100和1300°C之间的熔融行为不一致，从而通过行进溶剂浮游区（TSFZ）和富含Li的溶剂来生长LiCoO ₂单晶。确定在气氛和溶剂组成方面的最佳生长条件分别为Ar流量和原子比Li / Co 85:15。由于生长过程中Co-O相偏析对熔融区稳定性的影响，使用常规镜式熔炉生长的晶体包含Co-O相的周期性夹杂物。通过使用倾斜镜FZ炉，无夹杂的LiCoO ₂以倾角θ＝ 10°获得直径约5mm且长70mm的晶体。通过中子劳厄衍射确认生长的晶体为单畴。

更新日期：2018-11-08

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