LaAMnO（A：Li、Na、K）纳米粉末和纳米陶瓷的磁性

Magnetic Properties of LaAMnO (A: Li, Na, K) Nanopowders and Nanoceramics.

作者信息

Głuchowski Paweł, Nikonkov Ruslan, Tomala Robert, Stręk Wiesław, Shulha Tatsiana, Serdechnova Maria, Zheludkevich Mikhail, Pakalaniškis Andrius, Skaudžius Ramūnas, Kareiva Aivaras, Abramov Alexander, Kholkin Andrei, Bushinsky Maxim V, Karpinsky Dmitry

机构信息

Nanoceramics Inc., Okolna 2, PL-50422 Wroclaw, Poland.

Institute of Low Temperature and Structural Research PAS, Okolna 2, PL-50422 Wroclaw, Poland.

出版信息

Materials (Basel). 2020 Apr 10;13(7):1788. doi: 10.3390/ma13071788.

DOI:10.3390/ma13071788

PMID:32290150

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7179035/

Abstract

Nanocrystalline LaAMnO (where A is Li, Na, K) powders were synthesized by a combustion method. The powders used to prepare nanoceramics were fabricated via a high-temperature sintering method. The structure and morphology of all compounds were characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). It was found that the size of the crystallites depended on the type of alkali ions used. The high-pressure sintering method kept the nanosized character of the grains in the ceramics, which had a significant impact on their physical properties. Magnetization studies were performed for both powder and ceramic samples in order to check the impact of the alkali ion dopants as well as the sintering pressure on the magnetization of the compounds. It was found that, by using different dopants, it was possible to strongly change the magnetic characteristics of the manganites.

摘要

采用燃烧法合成了纳米晶LaAMnO（其中A为Li、Na、K）粉末。用于制备纳米陶瓷的粉末通过高温烧结法制备。所有化合物的结构和形貌通过X射线粉末衍射（XRD）和扫描电子显微镜（SEM）进行表征。发现微晶尺寸取决于所使用的碱离子类型。高压烧结法保持了陶瓷中晶粒的纳米尺寸特性，这对其物理性能有显著影响。对粉末和陶瓷样品都进行了磁化研究，以检验碱离子掺杂剂以及烧结压力对化合物磁化的影响。发现通过使用不同的掺杂剂，可以强烈改变锰酸盐的磁特性。