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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.

DOI:10.3390/ma15062267
PMID:35329720
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8954274/
Abstract

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.

摘要

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。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ba2a/8954274/bd623e8c5885/materials-15-02267-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ba2a/8954274/cd32d1f880d9/materials-15-02267-g007.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ba2a/8954274/bd623e8c5885/materials-15-02267-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ba2a/8954274/88cb5cf6a0c6/materials-15-02267-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ba2a/8954274/e9a6ff6bbbd9/materials-15-02267-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ba2a/8954274/7a643e7e0da8/materials-15-02267-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ba2a/8954274/216df9198037/materials-15-02267-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ba2a/8954274/9c30da631b79/materials-15-02267-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ba2a/8954274/cd32d1f880d9/materials-15-02267-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ba2a/8954274/158ab57bdf51/materials-15-02267-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ba2a/8954274/2d8479a6e817/materials-15-02267-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ba2a/8954274/57af25539da2/materials-15-02267-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ba2a/8954274/019eaed283e2/materials-15-02267-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ba2a/8954274/bd623e8c5885/materials-15-02267-g012.jpg

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