Effects of bismuth and bismuth-copper substitutions on structure, morphology, and magnetic properties of sol-gel derived barium hexaferrites

The partial substitution by bismuth (Bi) is aimed to improve magnetic properties of barium hexaferrites from the sol–gel auto-combustion synthesis. The exceptionally high saturation magnetization of 99 emu/g is attributed to the substitution of Fe3+ in tetrahedral 4f1 sites by Bi3+and the highly com...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Komkrich Chokprasombat, Abdulmumeen Lohmaah, Supree Pinitsoontorn, Chitnarong Sirisathitkul
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Barium hexaferrite Sol–gel auto-combustion Ion substitution Magnetization Coercivity Science (General) Q1-390
Acceso en línea:	https://doaj.org/article/a90be98c03204a7cb4fdd26828655a02
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:a90be98c03204a7cb4fdd26828655a02
record_format	dspace
spelling	oai:doaj.org-article:a90be98c03204a7cb4fdd26828655a022021-11-14T04:30:54ZEffects of bismuth and bismuth-copper substitutions on structure, morphology, and magnetic properties of sol-gel derived barium hexaferrites1018-364710.1016/j.jksus.2021.101682https://doaj.org/article/a90be98c03204a7cb4fdd26828655a022022-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S101836472100344Xhttps://doaj.org/toc/1018-3647The partial substitution by bismuth (Bi) is aimed to improve magnetic properties of barium hexaferrites from the sol–gel auto-combustion synthesis. The exceptionally high saturation magnetization of 99 emu/g is attributed to the substitution of Fe3+ in tetrahedral 4f1 sites by Bi3+and the highly compact structure without impurity phase. On the other hand, the coercivity is reduced with increasing Bi substitution because the hexagonal particles grow larger and single magnetic domains become multi-domains. Similarly, the co-substitution by bismuth-copper (Bi-Cu) ions substantially enhances the particle size and hence the reduction in coercivity is even more drastic. The reduction in coercivity of barium hexaferrites with high magnetizations are desirable for microwave absorbing and data storage materials. The magnetizations of barium hexaferrites with either Bi or Bi-Cu substitutions follow the law of approach saturation. However, the saturation magnetization is significantly lower by the Bi-Cu substitutions into octahedral 4f2 sites and the presence of the secondary hematite phase.Komkrich ChokprasombatAbdulmumeen LohmaahSupree PinitsoontornChitnarong SirisathitkulElsevierarticleBarium hexaferriteSol–gel auto-combustionIon substitutionMagnetizationCoercivityScience (General)Q1-390ENJournal of King Saud University: Science, Vol 34, Iss 1, Pp 101682- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Barium hexaferrite Sol–gel auto-combustion Ion substitution Magnetization Coercivity Science (General) Q1-390
spellingShingle	Barium hexaferrite Sol–gel auto-combustion Ion substitution Magnetization Coercivity Science (General) Q1-390 Komkrich Chokprasombat Abdulmumeen Lohmaah Supree Pinitsoontorn Chitnarong Sirisathitkul Effects of bismuth and bismuth-copper substitutions on structure, morphology, and magnetic properties of sol-gel derived barium hexaferrites
description	The partial substitution by bismuth (Bi) is aimed to improve magnetic properties of barium hexaferrites from the sol–gel auto-combustion synthesis. The exceptionally high saturation magnetization of 99 emu/g is attributed to the substitution of Fe3+ in tetrahedral 4f1 sites by Bi3+and the highly compact structure without impurity phase. On the other hand, the coercivity is reduced with increasing Bi substitution because the hexagonal particles grow larger and single magnetic domains become multi-domains. Similarly, the co-substitution by bismuth-copper (Bi-Cu) ions substantially enhances the particle size and hence the reduction in coercivity is even more drastic. The reduction in coercivity of barium hexaferrites with high magnetizations are desirable for microwave absorbing and data storage materials. The magnetizations of barium hexaferrites with either Bi or Bi-Cu substitutions follow the law of approach saturation. However, the saturation magnetization is significantly lower by the Bi-Cu substitutions into octahedral 4f2 sites and the presence of the secondary hematite phase.
format	article
author	Komkrich Chokprasombat Abdulmumeen Lohmaah Supree Pinitsoontorn Chitnarong Sirisathitkul
author_facet	Komkrich Chokprasombat Abdulmumeen Lohmaah Supree Pinitsoontorn Chitnarong Sirisathitkul
author_sort	Komkrich Chokprasombat
title	Effects of bismuth and bismuth-copper substitutions on structure, morphology, and magnetic properties of sol-gel derived barium hexaferrites
title_short	Effects of bismuth and bismuth-copper substitutions on structure, morphology, and magnetic properties of sol-gel derived barium hexaferrites
title_full	Effects of bismuth and bismuth-copper substitutions on structure, morphology, and magnetic properties of sol-gel derived barium hexaferrites
title_fullStr	Effects of bismuth and bismuth-copper substitutions on structure, morphology, and magnetic properties of sol-gel derived barium hexaferrites
title_full_unstemmed	Effects of bismuth and bismuth-copper substitutions on structure, morphology, and magnetic properties of sol-gel derived barium hexaferrites
title_sort	effects of bismuth and bismuth-copper substitutions on structure, morphology, and magnetic properties of sol-gel derived barium hexaferrites
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/a90be98c03204a7cb4fdd26828655a02
work_keys_str_mv	AT komkrichchokprasombat effectsofbismuthandbismuthcoppersubstitutionsonstructuremorphologyandmagneticpropertiesofsolgelderivedbariumhexaferrites AT abdulmumeenlohmaah effectsofbismuthandbismuthcoppersubstitutionsonstructuremorphologyandmagneticpropertiesofsolgelderivedbariumhexaferrites AT supreepinitsoontorn effectsofbismuthandbismuthcoppersubstitutionsonstructuremorphologyandmagneticpropertiesofsolgelderivedbariumhexaferrites AT chitnarongsirisathitkul effectsofbismuthandbismuthcoppersubstitutionsonstructuremorphologyandmagneticpropertiesofsolgelderivedbariumhexaferrites
_version_	1718429978100498432

Effects of bismuth and bismuth-copper substitutions on structure, morphology, and magnetic properties of sol-gel derived barium hexaferrites

Ejemplares similares