IRON POWDER, METHOD FOR PRODUCING THE SAME, MOLDED BODY FOR INDUCTOR, AND INDUCTOR
An iron powder with a small complex particle diameter is used for a molded body having a large real part μ′ of the complex relative permeability. A silane compound in an amount of from 0.1 to 0.3 in terms of Si/Fe ratio is added to a slurry containing a hydrated oxide of iron precipitate obtained th...
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| creator | YAMAJI, Hidenori GOTOH, Masahiro |
| description | An iron powder with a small complex particle diameter is used for a molded body having a large real part μ′ of the complex relative permeability. A silane compound in an amount of from 0.1 to 0.3 in terms of Si/Fe ratio is added to a slurry containing a hydrated oxide of iron precipitate obtained through neutralization of an acidic aqueous solution containing a trivalent Fe ion with an alkali aqueous solution to coat the precipitate of the hydrated oxide of iron with a hydrolyzate of the silane compound, in which a phosphorus-containing ion in an amount of from 0.003 to 0.1 in terms of P/Fe ratio co-exists in the slurry. The hydrated oxide of iron precipitate after coating is recovered through solid-liquid separation, and then heated to provide iron particles coated with a silicon oxide. The silicon oxide coating is dissolved and removed to provide the iron powder. |
| format | Patent |
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A silane compound in an amount of from 0.1 to 0.3 in terms of Si/Fe ratio is added to a slurry containing a hydrated oxide of iron precipitate obtained through neutralization of an acidic aqueous solution containing a trivalent Fe ion with an alkali aqueous solution to coat the precipitate of the hydrated oxide of iron with a hydrolyzate of the silane compound, in which a phosphorus-containing ion in an amount of from 0.003 to 0.1 in terms of P/Fe ratio co-exists in the slurry. The hydrated oxide of iron precipitate after coating is recovered through solid-liquid separation, and then heated to provide iron particles coated with a silicon oxide. 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A silane compound in an amount of from 0.1 to 0.3 in terms of Si/Fe ratio is added to a slurry containing a hydrated oxide of iron precipitate obtained through neutralization of an acidic aqueous solution containing a trivalent Fe ion with an alkali aqueous solution to coat the precipitate of the hydrated oxide of iron with a hydrolyzate of the silane compound, in which a phosphorus-containing ion in an amount of from 0.003 to 0.1 in terms of P/Fe ratio co-exists in the slurry. The hydrated oxide of iron precipitate after coating is recovered through solid-liquid separation, and then heated to provide iron particles coated with a silicon oxide. The silicon oxide coating is dissolved and removed to provide the iron powder.</description><subject>BASIC ELECTRIC ELEMENTS</subject><subject>CASTING</subject><subject>ELECTRICITY</subject><subject>INDUCTANCES</subject><subject>MAGNETS</subject><subject>MAKING METALLIC POWDER</subject><subject>MANUFACTURE OF ARTICLES FROM METALLIC POWDER</subject><subject>PERFORMING OPERATIONS</subject><subject>POWDER METALLURGY</subject><subject>SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES</subject><subject>TRANSFORMERS</subject><subject>TRANSPORTING</subject><subject>WORKING METALLIC POWDER</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2020</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZAjyDPL3UwjwD3dxDdJR8HUN8fB3UXDzD1IICPJ3CXX29HNXCPFwVQh29HUFSvv7uLi6KDj5u0SC1Xj6AZWE-AM1Ovq5wHk8DKxpiTnFqbxQmptB2c01xNlDN7UgPz61uCAxOTUvtSQ-NNjIAAhNzCzMzB0NjYlTBQBLHjAL</recordid><startdate>20200806</startdate><enddate>20200806</enddate><creator>YAMAJI, Hidenori</creator><creator>GOTOH, Masahiro</creator><scope>EVB</scope></search><sort><creationdate>20200806</creationdate><title>IRON POWDER, METHOD FOR PRODUCING THE SAME, MOLDED BODY FOR INDUCTOR, AND INDUCTOR</title><author>YAMAJI, Hidenori ; GOTOH, Masahiro</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US2020246867A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2020</creationdate><topic>BASIC ELECTRIC ELEMENTS</topic><topic>CASTING</topic><topic>ELECTRICITY</topic><topic>INDUCTANCES</topic><topic>MAGNETS</topic><topic>MAKING METALLIC POWDER</topic><topic>MANUFACTURE OF ARTICLES FROM METALLIC POWDER</topic><topic>PERFORMING OPERATIONS</topic><topic>POWDER METALLURGY</topic><topic>SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES</topic><topic>TRANSFORMERS</topic><topic>TRANSPORTING</topic><topic>WORKING METALLIC POWDER</topic><toplevel>online_resources</toplevel><creatorcontrib>YAMAJI, Hidenori</creatorcontrib><creatorcontrib>GOTOH, Masahiro</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>YAMAJI, Hidenori</au><au>GOTOH, Masahiro</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>IRON POWDER, METHOD FOR PRODUCING THE SAME, MOLDED BODY FOR INDUCTOR, AND INDUCTOR</title><date>2020-08-06</date><risdate>2020</risdate><abstract>An iron powder with a small complex particle diameter is used for a molded body having a large real part μ′ of the complex relative permeability. A silane compound in an amount of from 0.1 to 0.3 in terms of Si/Fe ratio is added to a slurry containing a hydrated oxide of iron precipitate obtained through neutralization of an acidic aqueous solution containing a trivalent Fe ion with an alkali aqueous solution to coat the precipitate of the hydrated oxide of iron with a hydrolyzate of the silane compound, in which a phosphorus-containing ion in an amount of from 0.003 to 0.1 in terms of P/Fe ratio co-exists in the slurry. The hydrated oxide of iron precipitate after coating is recovered through solid-liquid separation, and then heated to provide iron particles coated with a silicon oxide. The silicon oxide coating is dissolved and removed to provide the iron powder.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BASIC ELECTRIC ELEMENTS CASTING ELECTRICITY INDUCTANCES MAGNETS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER PERFORMING OPERATIONS POWDER METALLURGY SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TRANSFORMERS TRANSPORTING WORKING METALLIC POWDER |
| title | IRON POWDER, METHOD FOR PRODUCING THE SAME, MOLDED BODY FOR INDUCTOR, AND INDUCTOR |
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