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Improvements in the Sintering Behavior and Microwave Dielectric Properties of Geikielite-Type MgTiO3 Ceramics
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Improvements in the Sintering Behavior and Microwave Dielectric Properties of Geikielite-Type MgTiO3 Ceramics
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Improvements in the Sintering Behavior and Microwave Dielectric Properties of Geikielite-Type MgTiO3 Ceramics
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Journal Article
Improvements in the Sintering Behavior and Microwave Dielectric Properties of Geikielite-Type MgTiO3 Ceramics
2013
Overview
Microwave dielectric ceramics based on geikielite-type MgTiO
3
were prepared by an aqueous sol–gel process. The precursor powders and dielectric ceramics were characterized by x-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and microwave methods. Highly reactive nanosized magnesium titanate powders with particle sizes of 20 nm to 40 nm were successfully obtained at 500°C as precursors. Sintering characteristics and microwave dielectric properties of MgTiO
3
ceramics were studied as a function of sintering temperature from 1100°C to 1300°C. With increasing sintering temperature, the density,
ε
r
, and
Qf
values increased, saturating at 1200°C with excellent microwave properties of
ε
r
= 17.5,
Qf
= 156,300 GHz, and
τ
f
= −44 ppm/°C. Correlations between the microstructure and dielectric properties of MgTiO
3
ceramics were also investigated.
Publisher
Springer US,Springer,Springer Nature B.V
Subject
/ Characterization and Evaluation of Materials
/ Chemistry and Materials Science
/ Cross-disciplinary physics: materials science; rheology
/ Electronics and Microelectronics
/ Exact sciences and technology
/ Materials synthesis; materials processing
/ Optical and Electronic Materials
/ Physics
/ Powder metallurgy. Composite materials
