A Study on the Static Magnetic and Electromagnetic Properties of Silica-Coated Carbonyl Iron Powder after Heat Treatment for Improving Thermal Stability.
carbonyl iron powders
microwave absorption
silica coating
thermal stability
Journal
Materials (Basel, Switzerland)
ISSN: 1996-1944
Titre abrégé: Materials (Basel)
Pays: Switzerland
ID NLM: 101555929
Informations de publication
Date de publication:
28 Mar 2022
28 Mar 2022
Historique:
received:
12
02
2022
revised:
04
03
2022
accepted:
21
03
2022
entrez:
12
4
2022
pubmed:
13
4
2022
medline:
13
4
2022
Statut:
epublish
Résumé
In order to study the thermal stability of coated carbonyl iron powder (CIP) and its influence on magnetic properties, carbonyl iron powder was coated with a silica layer and then annealed in an air atmosphere at elevated temperatures. Transmission electron microscopy (TEM) analysis and Fourier transform infrared spectroscopy confirmed the existence of a silicon dioxide layer with a thickness of approximately 80~100 nm. Compared with uncoated CIP, the silicon-coated CIP still maintained a higher absorption performance after annealing, and the calculated impedance matching value Z only slightly decreased. It is worth noting that when the annealing temperature reached 300 °C, coercivity (
Identifiants
pubmed: 35407832
pii: ma15072499
doi: 10.3390/ma15072499
pmc: PMC8999542
pii:
doi:
Types de publication
Journal Article
Langues
eng
Subventions
Organisme : the Special project of high tech industrialization of science and technology cooperation between Jilin Province and Chinese Academy of Sciences
ID : Grant No. 2021SYHZ0037
Organisme : Light of West China" Program and the Science and Technology Plan of Gansu Province
ID : No.20JR10RA044