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Structure and Dielectric Properties of NiTiO 3 Powders Synthesized by the Modified Sol–Gel Method
Author(s) -
Chuang ShiowHuey,
Hsieh MinLung,
Wang DingYeong
Publication year - 2012
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201100496
Subject(s) - chemistry , crystallite , sol gel , raman spectroscopy , nickel , analytical chemistry (journal) , particle size , dielectric , ultraviolet visible spectroscopy , titanium , materials science , crystallography , nanotechnology , chromatography , organic chemistry , physics , optoelectronics , optics
This study reports the synthesis of nickel titanate (NiTiO 3 ) powders by using the modified sol‐gel method, with nickel acetate tetrahydrate as the nickel source, titanium isopropoxide as the titanium source, and 2‐methoxyethanol as the solvent, followed by post‐heat treatment in air at temperatures ranging from 500 °C to 900 °C. The characteristics of powders were determined by X‐ray diffraction (XRD), FT‐infrared spectroscopy (FT‐IR), ultraviolet/visible spectroscopy (UV/Vis), and Raman spectroscopy. The particle size and surface area of the powders were also measured. The results indicated that single‐phase NiTiO 3 can be prepared using the modified sol‐gel method, followed by post‐heat treatment at the relatively low temperature of 550 °C. The crystallite sizes and particle sizes of NiTiO 3 powders increase in conjunction with the post‐heat treatment temperatures. However, the surface area of the powders shrinks as the post‐heat treatment temperatures increase. The dielectric constants of NiTiO 3 powders, based on the capacitance‐voltage analysis, are within a range of 13.2 to 17.8.