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Enhanced Thermal Stability of Zinc‐Based Titanate (Dielectric) Ceramics Prepared by the Modified Sol–gel Route
Author(s) -
Xing Xianran,
Luo Jun,
Liu Guirong,
Qiao Lijie
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00826.x
Subject(s) - materials science , ceramic , dielectric , thermal stability , differential scanning calorimetry , sol gel , zinc , analytical chemistry (journal) , calorimetry , titanate , solubility , dissipation factor , mineralogy , nuclear chemistry , chemical engineering , metallurgy , chemistry , nanotechnology , chromatography , thermodynamics , physics , optoelectronics , engineering
A multi‐component substitution of Co and Ni was incorporated into ZnTiO 3 to form pure hexagonal Zn 1− x (Co 1/2 Ni 1/2 ) x TiO 3 ( x =0,0.8,0.9,1.0) dielectric ceramic powders by a modified sol–gel route, following heat treatments at 600°C for 3 h and at 800°C for 6 h. Differential scanning calorimetry measurements revealed that the order of increasing thermal stability of solid solution compound Zn 1− x (Co 1/2 Ni 1/2 ) x TiO 3 was ZnTiO 3 (945°C), Zn 0.1 Ni 0.9 TiO 3 (1346°C), Zn 0.1 (Co 1/2 Ni 1/2 ) 0.9 TiO 3 (1390°C), and Zn 0.1 Co 0.9 TiO 3 (>1400°C). Both the dielectric constant and loss tangent reached a maximum at x =0.8 and then decreased with solubility, x , and measurement frequency.