Synthesis, structure, morphology evolution and magnetic properties of single domain strontium hexaferrite particles. (1st April 2016)

• Record Type: Journal Article
• Authors: Chen, Deyang; Zeng, Dechang; Liu, Zhongwu
• Is Part Of: Materials research express. Volume 3:Number 4(2016)
• Publication Date: 2016-04-01
• Subjects: strontium ferrite -- single domain -- ball milling -- magnetization curve; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/3/4/045002
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: Single domain strontium ferrite particles (SrFe12 O19 ) with hexagonal morphology were synthesized by conventional ceramic process. Effects of Fe/Sr mole ratio and milling time on structure, morphology and magnetic properties of the strontium ferrite particles have been systematically studied. Single phase SrFe12 O19 was successfully synthesized in a large composition range of Fe/Sr ratio (Fe/Sr = 9–11). The particle size refinement effect and the morphology change were observed with the increase of Fe/Sr ratio. It was also found that the change of Fe/Sr ratio had little effect on the magnetization curve. However, the magnetization process was significantly influenced with different milling time. The optimal magnetic properties obtained at Fe/Sr = 11 with 6 h milling are 68.2 emu g −1 and 5540 Oe for saturation magnetization ( M S ) and intrinsic coercivity ( H C ), respectively. The high performance single domain strontium hexaferrite particles obtained in this paper would greatly facilitate the application in the permanent magnet industry.