【摘要】 本文研究了 U₃O₈掺杂的 PZT 95/5系统多晶固溶体在两个菱方铁电相间相变的热释电性能及材料的电导特性。认为 U₃O₈的加入不仅改善了材料的热释电优值,同时作为一种施主杂质使材料半导化,实验结果证实了载流子的传输机理与假设一致,并求出了载流子的激活能。发现了该材料具有巨大潜在应用前景的电荷储存特性。最后制备了适用于热释电红外探测器的、具有高热释电系数、低介电常数及半导化的铁电相变热释电陶瓷材料。更多还原

【Abstract】 The pyroelectric effect induced due to FE1-FE2 phase transition and the condu-cting behaviour of PZT 95/5 ceramics doped with U₃O₈ were studied.It was shownthat doping U₃O₈ could improve detectivity figure of merit over a wide temperaturerange,and it could act as a donor to make the material have semiconductivity.Thepredication on the conducting mechanism of carrier can be proved to be coincidedwith the experimental result.The activition energy of the carrier localized extra-electrons was obtained.That this material can store up large quantity of spacecharges was first discovered for application.A semiconducting material with highpyroelectric coefficient,low dielectric constant,low dielectric loss,and suitable tomake pyroelectric detector,was prepared.更多还原