Synthesis of stoichiometric LiNbO 3 nanopowder through a wet chemical method

作者：Shuhua Yao, Feifei Zheng, Hong Liu, Jiyang Wang, Huaijin Zhang, Tao Yan, Jianbo Wu, Zongren Xia, Xiaoyong Qin · 发表于：Crystal Research and Technology · 年份：2009 · DOI：10.1002/crat.200900064 · 被引用次数：12 · 研究领域：Photorefractive and Nonlinear Optics、Ferroelectric and Piezoelectric Materials、Solid State Laser Technologies

Abstract Stoichiometric lithium niobate powder which are used as feeding material in near stoichometric LiNbO 3 crystal growth have been successfully prepared from commercial niobium hydroxide [Nb(OH) 5 ] and nontoxic DL‐malic acid by a wet chemical method. The synthesis temperature was pre‐determined by the results from thermogravimetric and differential thermal analysis. The structure and morphology of the as‐prepared samples were observed by using the infrared spectroscopy and the scanning electron microscopy. The X‐ray diffraction experiment showed that lithium niobate powder had an ilmenite structure, and its unit cell parameters were calculated to be a = b = 0.5140 nm, c = 1.3738 nm, and V = 0.3144 nm 3 . The melting point of the synthesized powder is 1239 °C and Curie temperature T c is 1122 °C. This synthesis method would be helpful to grow the near‐stoichiometric LiNbO 3 crystal with double crucible techniques. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)