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Titanium Incorporation in Zn 2 TiO 4 Spinel Ceramics
Author(s) -
Kim Hyo Tae,
Kim Yoonho,
Valant Matjaz,
Suvorov Danilo
Publication year - 2001
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.1151-2916.2001.tb00793.x
Subject(s) - spinel , titanium , materials science , ceramic , crystal structure , mineralogy , titanium oxide , solubility , dielectric , crystal (programming language) , zinc , phase (matter) , analytical chemistry (journal) , inorganic chemistry , chemical engineering , metallurgy , crystallography , chemistry , programming language , optoelectronics , organic chemistry , chromatography , computer science , engineering
Compositions in the Zn 2 TiO 4 + x TiO 2 system ( x = 0–0.43) were synthesized via the solid‐state reaction route, using high‐purity (≥99.99%) metal‐oxide powders. The incorporation of titanium, in the form of TiO 2 , in Zn 2 TiO 4 spinel ceramics was investigated by analyzing the crystal structure and measuring the dielectric properties. The results of the crystal structure analyses suggested that TiO 2 levels of x ≤ 0.33 could be incorporated into the Zn 2 TiO 4 spinel at temperatures of T > 945°C, whereas the solid solubility of titanium in Zn 2 TiO 4 decreased for T < 945°C. When x ≥ 0.28, the Zn 2 Ti 3 O 8 phase formed in the Zn 2 TiO 4 grain interior while cooling after heat treatment. Measurement of the microwave dielectric properties also supported the conclusion that the solubility limit of titanium in Zn 2 TiO 4 was close to x = 0.33, as determined through analysis of the crystal structure.