Thermal processing and effect of additives on Ba-hexaferrite
Creators
- 1. Doctor A.Q. Khan Research Labs., Islamabad (Pakistan)
Description
Isotropic Ba-hexaferrite (BaFe/sub 12/O/sub 19/) was synthesized from powders of BaCO/sub 3/ and Fe/sub 2/O/sub 3/ by adapting the conventional ceramic technique. Effect of heat treatment and additives (SiO/sub 2/ and CaO) on the magnetic and microstructural properties was studied. CaO-addition promotes densification, which results in increased remanence, but due to simultaneous grain growth the coercivity drops. SiO/sub 2/ addition is known to suppress grain growth. Simultaneous addition of CaO and SiO/sub 2/ is shown to be very beneficial in tailoring a dense microstructure with relatively small grains. The ratio of SiO/sub 2/CaO was found to be optimum at about I. XRD studies confirmed the BaFe/sub l2/O/sub 19/ phase. Microstructural studies were performed on SEM, equipped with EDX-system. (author)
Additional details
Publishing Information
- Publisher
- Doctor A.Q. Khan Research Labs., Islamabad, Pakistan
- Imprint Place
- Islamabad (Pakistan)
- Imprint Title
- Advanced materials-2005
- Imprint Pagination
- 692 p.
- Journal Page Range
- p. 415-419
Conference
- Title
- 9. International Symposium on Advanced Materials
- Dates
- 19-22 Sep 2005
- Place
- Islamabad (Pakistan)
INIS
- Country of Publication
- Pakistan
- Country of Input or Organization
- Pakistan
- INIS RN
- 38048384
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- BARIUM COMPOUNDS; CERAMICS; CRYSTAL STRUCTURE; FERRITES; GRAIN GROWTH; IRON OXIDES; MAGNETIC PROPERTIES; MICROSTRUCTURE; RAW MATERIALS
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; FERRIMAGNETIC MATERIALS; IRON COMPOUNDS; MAGNETIC MATERIALS; MATERIALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; TRANSITION ELEMENT COMPOUNDS