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公开(公告)号：US20220089456A1
公开(公告)日：2022-03-24
申请号：US17433672
申请日：2020-02-28
发明人： Tatsuro HORI , Daisuke KODAMA , Shiho OBATA , Masahiro GOTOH
摘要： A substitution-type ε-iron oxide magnetic particle powder having a reduced content of a non-magnetic α-type iron-based oxide and Fe sites of ε-Fe2O3 partially substituted by another metal element is obtained by neutralizing an acidic aqueous solution containing a trivalent iron ion and an ion of a metal that partially substitutes Fe sites to a pH of 2.0 or higher and 7.0 or lower. A silicon compound having a hydrolyzable group is added to a dispersion liquid containing an iron oxyhydroxide having a substituent metal element or a mixture of an iron oxyhydroxide and a hydroxide of a substituent metal element. The dispersion liquid is neutralized to a pH of 8.0 or higher and the iron oxyhydroxide having a substituent metal element or the mixture of the iron oxyhydroxide and the hydroxide of a substituent metal element is coated with a chemical reaction product of the silicon compound and then heated.
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公开(公告)号：US20200094318A1
公开(公告)日：2020-03-26
申请号：US16473072
申请日：2017-12-28
发明人： Hideyuki FUJIMOTO , Keiichi ENDOH , Tatsuro HORI , Satoru KURITA
摘要： The present invention aims at providing a bonding material having both preferable dispensing properties and preferable bonding properties, and also providing a bonding method employing the bonding material. Provided are: a bonding material comprising fine silver particles having an average primary particle diameter of smaller than or equal to 130 nm, and a crosslinking-type inter-particle distance keeping agent crosslinking between the fine silver particles and keeping a distance between the fine silver particles; and a bonding method employing the bonding material.
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公开(公告)号：US20220162089A1
公开(公告)日：2022-05-26
申请号：US17433684
申请日：2020-03-13
发明人： Tatsuro HORI , Daisuke KODAMA , Shiho OBATA , Masahiro GOTOH
摘要： A substituted ε-iron oxide magnetic particle powder having a reduced content of an α-type iron-based oxide and Fe sites of ε-Fe2O3 partially substituted by another metal element is obtained by neutralizing an acidic aqueous solution containing a trivalent iron ion and an ion of a metal that partially substitutes Fe sites to a pH of between 2.0 and 7.0. Thereafter, a silicon compound having a hydrolyzable group is added to a dispersion liquid containing an iron oxyhydroxide having a substituent metal element or a mixture of an iron oxyhydroxide and a hydroxide of a substituent metal element. The dispersion liquid is neutralized to a pH of 8.0 or higher and the iron oxyhydroxide having a substituent metal element or the mixture of the iron oxyhydroxide and the hydroxide of a substituent metal element is coated with a chemical reaction product of the silicon compound. The dispersion is then heated.
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