使用玻璃成分提高 BiScO3–PbTiO3 压电陶瓷的机械品质因数,RSC Advances

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使用玻璃成分提高 BiScO3–PbTiO3 压电陶瓷的机械品质因数
RSC Advances ( IF 3.9 ) Pub Date : 2022-03-14 , DOI: 10.1039/d2ra00275b
Hongwei Shi _{1,

2} , Zujian Wang ₁ , Xiaoming Yang ₁ , Rongbing Su ₁ , Xifa Long _{1,

2} , Chao He _{1,

2}

Affiliation

与纯Pb基钙钛矿铁电材料相比，Bi(Me)O ₃ –PbTiO ₃ (Me = Sc ³⁺ , In ³⁺ , Yb ³⁺ )因其在居里温度方面的显着优势而备受关注。其中，BiScO ₃ -PbTiO ₃压电陶瓷具有较高的居里温度和优异的压电系数，是一种潜在的高温应用压电材料。但其缺点是介电损耗高，机械品质因数低。在此，我们报告了通过添加玻璃成分（GeO ₂）。_{添加GeO 2}后居里温度有小的变化。_{随着GeO 2}的增加，压电系数d ₃₃和平面机电耦合因子k _p先增大后减小，机械品质因数Q _m单调增大。0.36BS–0.64PT + 0.5 mol%GeO ₂陶瓷具有最佳的电性能，T _C为 455 °C，d ₃₃为 385 pC N ^-1，k _p为 58%，Q _m为 90。热稳定性 0.36BS–0.64PT +x GeO ₂和 0.36BS–0.64PT 陶瓷几乎相同。得出的结论是，BS-PT 陶瓷的机械品质因数可以通过添加 GeO ₂来提高，而其他性能保持不变。

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Enhanced mechanical quality factor of BiScO3–PbTiO3 piezoelectric ceramics using glass composition

Compared with pure Pb-based perovskite ferroelectric materials, Bi(Me)O₃–PbTiO₃ (Me = Sc³⁺, In³⁺, Yb³⁺) have attracted attention due to their remarkable advantage in their Curie temperature. Among them, BiScO₃–PbTiO₃ piezoelectric ceramic is a potential piezoelectric material in high-temperature applications for its high Curie temperature and excellent piezoelectric coefficient. However, its shortcomings are high dielectric loss and low mechanical quality factor. Herein, we report the improvement of the mechanical quality factor of 0.36BS–0.64PT ceramics through the addition of glass composition (GeO₂). There is a small change in the Curie temperature after GeO₂ addition. The piezoelectric coefficient d₃₃ and planar electromechanical coupling factor k_p increase first and then decrease, and the mechanical quality factor Q_m monotone increases with an increase in GeO₂. The 0.36BS–0.64PT + 0.5 mol%GeO₂ ceramics have optimal electrical properties with T_C of 455 °C, d₃₃ of 385 pC N⁻¹, k_p of 58%, and Q_m of 90. In addition, the thermal stability of 0.36BS–0.64PT + xGeO₂ and 0.36BS–0.64PT ceramics is almost the same. It was concluded that the mechanical quality factor of BS–PT ceramics can be enhanced by the addition of GeO₂ with other properties remaining unchanged.

更新日期：2022-03-14

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