Open AccessStudy of Sintering Temperature on Dielectric Properties of CaCu3Ti4O12 Materials Prepared by Sol-Gel Method
Author(s) -
W. Sue-Aok,
Jinda Khemprasit
Publication year - 2020
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2020.22926
Subject(s) - sintering , calcination , sol gel , dielectric , pellets , chemical engineering , perovskite (structure) , dielectric spectroscopy , chemistry , materials science , acetic acid , analytical chemistry (journal) , nuclear chemistry , composite material , chromatography , nanotechnology , crystallography , organic chemistry , optoelectronics , electrode , electrochemistry , engineering , catalysis
CaCu3Ti4O12 (CCTO) powder was prepared by sol-gel process using acetic acid as a solvent and alsoas cross-linking agent by varying the sintering temperature (1000-1150 ºC) for 3 h. The dried gelswere characterized by TG-DTA and FT-IR techniques. The sintered samples were characterized byXRD, SEM techniques and impedance analyzer for dielectric properties measurement. The sampleshowed the perovskite structure with small amounts of TiO2 and CuO phases. The best dielectricproperties (εr = 1.38 × 104 and tan δ = 0.13 at 10 kHz and room temperature) were observed in theCCTO pellets calcined at 800 ºC for 3 h and sintered at 1100 ºC for 3 h.