Work

Crystal growth behavior of La 0.8 Ca 0.2 Cr 0.2 Al 0.8 O 3 nanopowders prepared via sol–gel process

Year: 2025

Type: article

Abstract: The effects of the addition of acetic acid (HAc) and ethanol on the phase structure and crystal growth behavior of the La 0.8 Ca 0.2 Cr 0.2 Al 0.8 O 3 nanopowders prepared via the sol–gel method were investigated. As a result, the La 0.8 Ca 0.2 Cr 0.2 Al 0.8 O 3 nanopowders with a stable hexagonal structure were successfully fabricated after heat treatment at 1400°C using a low acetic acid content. The activation energy of crystal growth increased first and then decreased with the increase of HAc or ethanol addition. In comparison, the increment in the quantity of HAc had a more pronounced effect on the activation energy of crystal growth. Correspondingly, the crystallite size of final products was controlled to be 37.14 nm, and the lowest activation energy (22.47 ± 0.46 kJ/mol) for crystal growth of La 0.8 Ca 0.2 Cr 0.2 Al 0.8 O 3 nanopowders was obtained with deionized water as the solvent and the M/HAc molar ratio of 2:1, which was beneficial to the crystallization of La 0.8 Ca 0.2 Cr 0.2 Al 0.8 O 3 grains.

Source: International Journal of Applied Ceramic Technology

DOI: 10.1111/ijac.15122

Authors: Huijun Jiang, Wenzhi Huang, Ling Zhu, Zixin Deng, Weiguo Peng

Institutions: Changsha University of Science and Technology, National University of Defense Technology

Language: English

Topic: Advanced ceramic materials synthesis

Subfield: Ceramics and Composites

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: National Natural Science Foundation of China, Natural Science Foundation of Hunan Province

Awards: 基于电磁功能基元序构的陶瓷基多频谱隐身涂层, G8751947707