Hydrothermal Synthesis and Magnetic Property of Nanocrystalline Sr-Cr Hydrogarnet

Abstract

Abstract: Nanocrystalline Sr--Cr hydrogarnet was synthesized from a relatively mild hydrothermal system. High solubility of the initial of species and highly concentrated mineralizer
lowered the crystallization temperature and enhanced the crystalinity. With increasing temperature, OH bondings to the Sr dodecahecra were broken, and in air or O₂, oxidation
from Cr(Ⅲ) to Cr(Ⅵ) occurred. Valence variation of the framwork Cr ions determined the decomposition process and the structural types of the decomposition products.
Nanocrystalline Sr--Cr hydrogarnet is paramagnetic, and the complete quenching of the orbitle monument was observed. Highly symmetric Cr--OH octahedra were revealed.

Key words: nanocrystalline, hydrogarnet, susceptibility

CLC Number:

TQ174

LI Guang-She,WANG Min-Qiang,MAO Ya-Chun,YAO Xi,FENG Shou-Hua. Hydrothermal Synthesis and Magnetic Property of Nanocrystalline Sr-Cr Hydrogarnet[J]. Journal of Inorganic Materials.

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Hydrothermal Synthesis and Magnetic Property of Nanocrystalline Sr-Cr Hydrogarnet

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