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Structural and dielectric properties of (La, Bi) modified PZT ceramics

机译:(La,Bi)改性PZT陶瓷的结构和介电性能

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Polycrystalline samples of Pb_(0.9)(La_(1-z)Bi_z)_(0.1)(Zr_(0.55)Ti_(0.45))_(0.975)O_3 [referred as PLBZT] (z = 0.0, 0.3, 0.5 and 0.7) have been synthesized by a high-temperature solid-state reaction technique. X-ray diffraction analysis suggests the formation of single-phase compounds with monoclinic structure. The dielectric studies of the compounds as a function of temperature (room temperature. RT to 350 ℃) at frequency (1, 10 and 100 kHz) show that the compounds undergo a phase transition of diffuse type. Diffusivity (γ) study of phase transition of these compounds provided its value between 1 and 2, indicating the. variation of degree of disordering in the system. Measurement of dc resistivity (ρ) as a function of temperature (RT to 350 ℃) at a constant biasing field suggests the compounds have negative temperature coefficient of resistance.
机译:Pb_(0.9)(La_(1-z)Bi_z)_(0.1)(Zr_(0.55)Ti_(0.45))_(0.975)O_3 [称为PLBZT](z = 0.0、0.3、0.5和0.7已经通过高温固态反应技术合成了)。 X射线衍射分析表明形成具有单斜晶结构的单相化合物。化合物在频率(1、10和100 kHz)下随温度(室温。RT至350℃)的变化而进行的介电研究表明,化合物经历了扩散型的相变。这些化合物的相变的扩散性(γ)研究提供了其值在1和2之间,表明该值。系统混乱程度的变化。在恒定偏置场下测量直流电阻率(ρ)与温度(RT至350℃)的关系,表明这些化合物的电阻温度系数为负。

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