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中文摘要：
采用固相法制备（1–x）（K0.52Na0.44Li0.04）（Nb0.86Ta0.10Sb0.04）O3–xBiFeO3[（1–x）LF4–xBF]无铅压电陶瓷,研究BF含量（0≤x≤0.010 00）对LF4陶瓷微观结构和电性能的影响。结果表明：所有样品均具有纯的四方钙钛矿结构,引入BF能明显改善LF4陶瓷的致密性,样品的机械品质因子Qm得到显著提高,压电性能和铁电性能随x的增加呈现出先升高后降低趋势。当x=0.002 50时,材料表现出优异性能：相对密度ρ=98.6%,压电常数d33=276pC/N,机械品质因子Qm=454,矫顽场Ec=1.56 kV/mm,剩余极化强度Pr=21.5μC/cm2。热稳定性和老化性研究结果显示：x=0.002 50时制备的LF4-BF体系样品具有稳定的电性能,表明该陶瓷在高温条件下具有潜在的应用前景。
英文摘要：
Lead-free piezoelectric ceramics（1–x）（K0.52Na0.44Li0.04）（Nb0.86Ta0.10Sb0.04）O3–xBiFeO3 [（1–x）LF4–xBF] were prepared by solid state reaction method.The effect of BF content（0≤x≤0.010 00） on the microstructure and electrical properties of the ceramics were investigated.It is found that all the samples has a pure perovskite phase structure with the tetragonal symmetry.The relative density ρ and mechanical quality factor Qm of LF4-based ceramics increase significantly after BF is added.Moreover,the piezoelec-tric and ferroelectric properties of LF4-based ceramics increase first and then decrease with the increase of BF content.The ceramic with x = 0.002 50 exhibits the optimal properties： the relative density ρ = 98.6%,piezoelectric constant d33 = 276 pC/N,mechanical quality factor Qm = 454,coercive field Ec = 1.56 kV/mm,and remanent polarization Pr = 21.5 μC/cm2.Thermal annealing and aging studies indicate that the LF4-BF sample（x = 0.002 50） possesses stable electrical properties,showing that the ceramic is a potential material for high temperature application.
同期刊论文项目
同项目期刊论文
Electronic and Optical Properties of KNbO3,NaNbO3 and K0.5Na0.5NbO3 in Paraelectric Cubic Phase: a C
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