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Synthesis, Characterization, and Microwave Dielectric Properties of ATiO 3 (A=Co, Mn, Ni) Ceramics
Author(s) -
Anjana Prabhakaran Sreekumari,
Sebastian Mailadil Thomas
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.1551-2916.2006.01004.x
Subject(s) - ceramic , dielectric , microstructure , materials science , scanning electron microscope , analytical chemistry (journal) , microwave , permittivity , temperature coefficient , relative permittivity , electroceramics , mineralogy , optoelectronics , chemistry , composite material , physics , medicine , microfabrication , alternative medicine , chromatography , quantum mechanics , pathology , fabrication
The ATiO 3 (A=Co, Mn, Ni) dielectric ceramics have been synthesized by the conventional solid‐state ceramic route. The structure and microstructure of these ceramic samples have been studied using powder X‐ray diffraction and scanning electron microscopy. The microwave dielectric properties such as relative permittivity (ɛ r ), quality factor ( Q u × f ), and coefficient of temperature variation of resonant frequency (τ f ) of the ceramics have been measured in the frequency range 4–6 GHz using resonance methods. The dielectric constant of ATiO 3 (A=Co, Mn, Ni) varies from 19 to 25 and τ f close to −50 ppm/°C. The ceramics have high‐quality factors ( Q u × f ) of 62 500 GHz (at 5.42 GHz) for CoTiO 3 , 15 200 GHz (at 5.22 GHz) for MnTiO 3 , and 13 900 GHz (at 5.24 GHz) for NiTiO 3 , respectively.