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Synthesis of stoichiometric LiNbO 3 nanopowder through a wet chemical method
Author(s) -
Yao Shuhua,
Zheng Feifei,
Liu Hong,
Wang Jiyang,
Zhang Huaijin,
Yan Tao,
Wu Jianbo,
Xia Zongren,
Qin Xiaoyong
Publication year - 2009
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200900064
Subject(s) - stoichiometry , lithium niobate , materials science , thermogravimetric analysis , powder diffraction , niobium , crucible (geodemography) , scanning electron microscope , thermogravimetry , lithium hydroxide , analytical chemistry (journal) , differential scanning calorimetry , lithium (medication) , melting point , curie temperature , infrared spectroscopy , crystallography , chemistry , inorganic chemistry , metallurgy , ion exchange , endocrinology , ion , composite material , chromatography , thermodynamics , medicine , physics , computational chemistry , optoelectronics , organic chemistry , quantum mechanics , ferromagnetism
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)