Ferrite sintered magnet
The present invention provides a ferrite sintered magnet comprising (1) main phase grains containing a ferrite having a hexagonal structure, (2) two-grain boundaries formed between two of the main phase grains, and (3) multi-grain boundaries surrounded by three or more of the main phase grains. The...
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| creator | Morita, Hiroyuki Ikeda, Masanori Murakawa, Yoshitaka Ono, Hiroyuki Murase, Taku |
| description | The present invention provides a ferrite sintered magnet comprising (1) main phase grains containing a ferrite having a hexagonal structure, (2) two-grain boundaries formed between two of the main phase grains, and (3) multi-grain boundaries surrounded by three or more of the main phase grains. The above ferrite sintered magnet comprises Ca, R, Sr, Fe and Co, with R being at least one element selected from the group consisting of rare earth elements and Bi, and comprising at least La. The number Nm of the above main phase grains and the number Ng of the above multi-grain boundaries in the cross section including the direction of the easy magnetization axis of the above ferrite sintered magnet satisfy the formula (1A):50%≤Nm/(Nm+Ng)≤65% (1A). |
| format | Patent |
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The above ferrite sintered magnet comprises Ca, R, Sr, Fe and Co, with R being at least one element selected from the group consisting of rare earth elements and Bi, and comprising at least La. The number Nm of the above main phase grains and the number Ng of the above multi-grain boundaries in the cross section including the direction of the easy magnetization axis of the above ferrite sintered magnet satisfy the formula (1A):50%≤Nm/(Nm+Ng)≤65% (1A).</description><language>eng</language><subject>ARTIFICIAL STONE ; BASIC ELECTRIC ELEMENTS ; CEMENTS ; CERAMICS ; CHEMISTRY ; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS ; CONCRETE ; ELECTRICITY ; INDUCTANCES ; LIME, MAGNESIA ; MAGNETS ; METALLURGY ; REFRACTORIES ; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ; SLAG ; TRANSFORMERS ; TREATMENT OF NATURAL STONE</subject><creationdate>2022</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20220705&DB=EPODOC&CC=US&NR=11380466B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76418</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20220705&DB=EPODOC&CC=US&NR=11380466B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Morita, Hiroyuki</creatorcontrib><creatorcontrib>Ikeda, Masanori</creatorcontrib><creatorcontrib>Murakawa, Yoshitaka</creatorcontrib><creatorcontrib>Ono, Hiroyuki</creatorcontrib><creatorcontrib>Murase, Taku</creatorcontrib><title>Ferrite sintered magnet</title><description>The present invention provides a ferrite sintered magnet comprising (1) main phase grains containing a ferrite having a hexagonal structure, (2) two-grain boundaries formed between two of the main phase grains, and (3) multi-grain boundaries surrounded by three or more of the main phase grains. The above ferrite sintered magnet comprises Ca, R, Sr, Fe and Co, with R being at least one element selected from the group consisting of rare earth elements and Bi, and comprising at least La. The number Nm of the above main phase grains and the number Ng of the above multi-grain boundaries in the cross section including the direction of the easy magnetization axis of the above ferrite sintered magnet satisfy the formula (1A):50%≤Nm/(Nm+Ng)≤65% (1A).</description><subject>ARTIFICIAL STONE</subject><subject>BASIC ELECTRIC ELEMENTS</subject><subject>CEMENTS</subject><subject>CERAMICS</subject><subject>CHEMISTRY</subject><subject>COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS</subject><subject>CONCRETE</subject><subject>ELECTRICITY</subject><subject>INDUCTANCES</subject><subject>LIME, MAGNESIA</subject><subject>MAGNETS</subject><subject>METALLURGY</subject><subject>REFRACTORIES</subject><subject>SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES</subject><subject>SLAG</subject><subject>TRANSFORMERS</subject><subject>TREATMENT OF NATURAL STONE</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2022</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBB3Sy0qyixJVSjOzCtJLUpNUchNTM9LLeFhYE1LzClO5YXS3AyKbq4hzh66qQX58anFBYnJqUBV8aHBhobGFgYmZmZORsbEqAEA0nEiFw</recordid><startdate>20220705</startdate><enddate>20220705</enddate><creator>Morita, Hiroyuki</creator><creator>Ikeda, Masanori</creator><creator>Murakawa, Yoshitaka</creator><creator>Ono, Hiroyuki</creator><creator>Murase, Taku</creator><scope>EVB</scope></search><sort><creationdate>20220705</creationdate><title>Ferrite sintered magnet</title><author>Morita, Hiroyuki ; Ikeda, Masanori ; Murakawa, Yoshitaka ; Ono, Hiroyuki ; Murase, Taku</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US11380466B23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2022</creationdate><topic>ARTIFICIAL STONE</topic><topic>BASIC ELECTRIC ELEMENTS</topic><topic>CEMENTS</topic><topic>CERAMICS</topic><topic>CHEMISTRY</topic><topic>COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS</topic><topic>CONCRETE</topic><topic>ELECTRICITY</topic><topic>INDUCTANCES</topic><topic>LIME, MAGNESIA</topic><topic>MAGNETS</topic><topic>METALLURGY</topic><topic>REFRACTORIES</topic><topic>SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES</topic><topic>SLAG</topic><topic>TRANSFORMERS</topic><topic>TREATMENT OF NATURAL STONE</topic><toplevel>online_resources</toplevel><creatorcontrib>Morita, Hiroyuki</creatorcontrib><creatorcontrib>Ikeda, Masanori</creatorcontrib><creatorcontrib>Murakawa, Yoshitaka</creatorcontrib><creatorcontrib>Ono, Hiroyuki</creatorcontrib><creatorcontrib>Murase, Taku</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Morita, Hiroyuki</au><au>Ikeda, Masanori</au><au>Murakawa, Yoshitaka</au><au>Ono, Hiroyuki</au><au>Murase, Taku</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Ferrite sintered magnet</title><date>2022-07-05</date><risdate>2022</risdate><abstract>The present invention provides a ferrite sintered magnet comprising (1) main phase grains containing a ferrite having a hexagonal structure, (2) two-grain boundaries formed between two of the main phase grains, and (3) multi-grain boundaries surrounded by three or more of the main phase grains. The above ferrite sintered magnet comprises Ca, R, Sr, Fe and Co, with R being at least one element selected from the group consisting of rare earth elements and Bi, and comprising at least La. The number Nm of the above main phase grains and the number Ng of the above multi-grain boundaries in the cross section including the direction of the easy magnetization axis of the above ferrite sintered magnet satisfy the formula (1A):50%≤Nm/(Nm+Ng)≤65% (1A).</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ARTIFICIAL STONE BASIC ELECTRIC ELEMENTS CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE ELECTRICITY INDUCTANCES LIME, MAGNESIA MAGNETS METALLURGY REFRACTORIES SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SLAG TRANSFORMERS TREATMENT OF NATURAL STONE |
| title | Ferrite sintered magnet |
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