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Effects of Particle Size on Electromagnetic and Microwave Absorption Properties of L a 0.7 S r 0.3 M n O 3±δ ‐Epoxy Composite
Author(s) -
Zhang Shuyuan,
Cao Quanxi,
Zhang Maolin,
Cai Lei,
Yan Qidong
Publication year - 2013
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12091
Subject(s) - materials science , particle size , reflection loss , microwave , raw material , ball mill , analytical chemistry (journal) , absorption (acoustics) , mineralogy , chemical engineering , composite material , composite number , chromatography , chemistry , physics , organic chemistry , quantum mechanics , engineering
L a 0.7 S r 0.3 M n O 3±δ powders were fabricated by solid‐state reaction method at 1473 K for 4 h. The precursors were prepared by ball‐milling raw materials for 3, 6, 9, and 12 h, respectively. The crystal structures, particle size, and morphologies of precursors and prepared L a 0.7 S r 0.3 M n O 3±δ were characterized by XRD , laser particle size analyzer and SEM , respectively. It is found that L a 0.7 S r 0.3 M n O 3±δ possessed large particle size by ball‐milling raw materials for a long time. Results indicated that L a 0.7 S r 0.3 M n O 3±δ , synthesized by ball‐milling raw materials for 3 h, exhibited the optimal microwave absorption properties. The maximum reflection loss was −28.8 dB, and the −6 dB absorption bandwidth was 5.80 GHz.