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Effect of ZrO_2 doping on the tunable and dielectric properties of BSTO/MgO composite ferroelectric ceramic

Shen Chao-zhong

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Abstract

Based on (MgO) =55% magnesia mixed with Ba0.55Sr0.45TiO3(BSTO), the influence of ZrO2 dopant on the dielectric properties of BSTO /MgO was investigated. The results show that with the increase of the quality of ZrO2 dopant, the loss tangents of BSTO/MgO material remain basically unchanged and tunability significantly enhanced, but excess quantity of ZrO2 would lower tunability. When the quantity of ZrO2 was 1%, BST/MgO material with dielectric constant was equal to 117, and dielectric loss of 3.95×10-3 (3.2 GHz), the dielectric constant tunability 9.9% (2.0 kV/mm) could be obtained. By virtue of the theory of dielectric, the modified mechanism of the influence of ZrO2 dopant on the dielectric properties of BST/MgO was analysed.

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What this paper is about

Based on (MgO) =55% magnesia mixed with Ba0.55Sr0.45TiO3(BSTO), the influence of ZrO2 dopant on the dielectric properties of BSTO /MgO was investigated. The results show that with the increase of the quality of ZrO2 dopant, the loss tangents of BSTO/MgO material remain basically unchanged and tunability significantly enhanced, but excess quantity of ZrO2 would lower tunability. When the quantity of ZrO2 was 1%, BST/MgO material with dielectric constant was equal to 117, and dielectric loss of 3.95×10-3 (3.2 GHz), the dielectric constant tunability 9.9% (2.0 kV/mm) could be obtained. By virtue of the theory of dielectric, the modified mechanism of the influence of ZrO2 dopant on the dielectric properties of BST/MgO was analysed.

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Available abstract

Based on (MgO) =55% magnesia mixed with Ba0.55Sr0.45TiO3(BSTO), the influence of ZrO2 dopant on the dielectric properties of BSTO /MgO was investigated. The results show that with the increase of the quality of ZrO2 dopant, the loss tangents of BSTO/MgO material remain basically unchanged and tunability significantly enhanced, but excess quantity of ZrO2 would lower tunability. When the quantity of ZrO2 was 1%, BST/MgO material with dielectric constant was equal to 117, and dielectric loss of 3.95×10-3 (3.2 GHz), the dielectric constant tunability 9.9% (2.0 kV/mm) could be obtained. By virtue of the theory of dielectric, the modified mechanism of the influence of ZrO2 dopant on the dielectric properties of BST/MgO was analysed.

Key concepts: Materials science, Dielectric, Dopant, Ceramic, Doping, Dielectric loss, Ferroelectricity, Dissipation factor

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Effect of ZrO_2 doping on the tunable and dielectric properties of BSTO/MgO composite ferroelectric ceramic — Research Paper | ScholarLens