Abstract

Single-phase nanocrystalline (18–20 nm) lanthanum indate powder (LaInO₃) and neodymium indate powder (NdInO₃) with the structure of orthorhombic perovskite are synthesized by the coprecipitation of hydroxides with the simultaneous ultrasonic treatment of the precipitation and subsequent firing of the powder-precursors at a temperature of 700°C. Ceramic samples with an open porosity of 4 to 5% are obtained during the sintering of the LaInO₃ and NdInO₃ powders at 1300°C (2 h). The range of changes in the electrical resistance of the sintered ceramics in the temperature range 400–1000°C is established. It is revealed that the heat treatment (1000°C) of indates of lanthanum and neodymium in argon reduces the electrical resistance by 2–3 orders of magnitude compared to their heat treatment in air.

中文翻译：

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镧和钕钕酸酯的合成与性能研究

摘要

具有正交晶型钙钛矿结构的单相纳米晶（18–20 nm）碘化镧粉末（LaInO ₃）和钕酸钕粉末（NdInO ₃）是通过氢氧化物的共沉淀并同时超声沉淀和随后焙烧而合成的。粉末前体的温度为700°C。在LaInO ₃和NdInO ₃的烧结过程中，获得了孔隙率为4％至5％的陶瓷样品。粉末在1300℃（2小时）。确定了在400–1000°C温度范围内烧结陶瓷的电阻变化范围。结果表明，与在空气中进行热处理相比，对氩和镧中的镧和钕元素进行的热处理（1000°C）将其电阻降低了2-3个数量级。