Microstructure and Microwave Dielectric Properties of BaTi4O9 Ceramics Derived from a Sol-Gel Precursor

Xian Li Huang; Fu Ping Wang; Ying Song

doi:10.4028/www.scientific.net/AMR.326.127

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Microstructure and Microwave Dielectric Properties of BaTi₄O₉ Ceramics Derived from a Sol-Gel Precursor

Abstract:

In the present work, the microstructure and microwave dielectric properties of BaTi₄O₉ ceramics derived from a sol-gel precursor were presented. Density measuring results demonstrated that the largest densities of ceramic sample about 96.7% could be reached by virtue of a cool iso-static press and a sintering process at at 1300 °C for 6 hours. The dielectric constant (ε_r), quality factor (Q×f) and the temperature coefficients (τ_f) of the BaTi₄O₉ ceramic samples were 36.65, 28000 GHz, +20.2 ppm/°C, respectively. XRD, SEM and XPS were used to characterize the microstructure of the ceramics samples. Substantial Ti³⁺ was proposed to be the cause of dielectric loss.

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Advanced Materials Research (Volume 326)

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127-130

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https://doi.org/10.4028/www.scientific.net/AMR.326.127

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September 2011

Authors:

Xian Li Huang, Fu Ping Wang, Ying Song

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Lattice Vibration, Microstructure, Microwave Dielectric Ceramics, Titanate

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