正铌酸镨及镨取代的正铌酸镧：电学与结构性质
Praseodymium Orthoniobate and Praseodymium Substituted Lanthanum Orthoniobate: Electrical and Structural Properties.
作者信息
Dzierzgowski Kacper, Wachowski Sebastian, Łapiński Marcin, Mielewczyk-Gryń Aleksandra, Gazda Maria
机构信息
Institute of Nanotechnology and Materials Engineering, Faculty of Applied Physics and Mathematics, Advanced Materials Centre, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland.
出版信息
Materials (Basel). 2022 Mar 18;15(6):2267. doi: 10.3390/ma15062267.
In this paper, the structural properties and the electrical conductivity of LaPrNbO (x = 0.00, 0.05, 0.1, 0.15, 0.2, 0.3) and PrNbO are presented and discussed. All synthesized samples crystallized in a monoclinic structure with similar thermal expansion coefficients. The phase transition temperature between the monoclinic and tetragonal structure increases with increasing praseodymium content from 500 °C for undoped LaNbO to 700 °C for PrNbO. Thermogravimetry, along with X-ray photoelectron spectroscopy, confirmed a mixed 3/4 oxidation state of praseodymium. All studied materials, in humid air, exhibited mixed protonic, oxygen ionic and hole conductivity. The highest total conductivity was measured in dry air at 700 °C for PrNbO, and its value was 1.4 × 10 S/cm.
本文介绍并讨论了LaPrNbO（x = 0.00、0.05、0.1、0.15、0.2、0.3）和PrNbO的结构特性及电导率。所有合成样品均结晶为具有相似热膨胀系数的单斜结构。单斜结构与四方结构之间的相变温度随着镨含量的增加而升高，从未掺杂的LaNbO的500℃升高到PrNbO的700℃。热重分析以及X射线光电子能谱证实了镨的3/4混合氧化态。在潮湿空气中，所有研究材料均表现出质子、氧离子和空穴的混合导电性。在700℃的干燥空气中测得PrNbO的总电导率最高，其值为1.4×10 S/cm。
Zotero 插件