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公开(公告)号：JP2000054012A
公开(公告)日：2000-02-22
申请号：JP21071699
申请日：1999-07-26
Applicant: IBM
Inventor： MURRAY CHRISTOPHER BRUCE , SUN SHOUHENG
IPC: H01F1/06 , B01F3/12 , B01J35/00 , B22F1/00 , B22F1/02 , B22F9/24 , B22F9/30 , B82B3/00 , H01F1/00 , H01F1/20 , H01F1/44
Abstract: PROBLEM TO BE SOLVED: To provide a method for producing nanograins. SOLUTION: This method contains a step in which a metallic precursory soln. is formed from a transition metal, a step in which this metallic precursory soln. is injected into a surfactant soln., a step in which the soln. is added with a coagulant and nanograins are precipitated from the soln. without causing permanent coagulation and a step in which the nanograins are added with a hydrocarbon solvent ad the nanograins are redispersed or converted into a colloid again.
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公开(公告)号：JP2000048340A
公开(公告)日：2000-02-18
申请号：JP21074199
申请日：1999-07-26
Applicant: IBM
Inventor： BLACK CHARLES T , GATES STEPHEN M , MURRAY CHRISTOPHER B , SUN SHOUHENG
Abstract: PROBLEM TO BE SOLVED: To provide a method to form periodical arrangement of magnetic nano particles into a layer (which may be a single layer or multilayer) with high regularity and to stabilize the arrangement above described on a substrate. SOLUTION: Magnetic nano particles having substantially uniform diameter are arranged at substantially uniform interval on the surface of a substrate 5. The nano particles consist of a magnetic material selected from a group of elements of Co, Fe, Ni, Mn, Sm, Nd, Pr, Pt and Gd, intermetallic compds. of the above elements, binary alloys of the above elements, ternary alloys of the above elements, Fe oxides containing at least one kind of element above described except for Fe, barium ferrite and strontium ferrite. A wear-resistant coating film is preferably deposited so as to adhere the nano particles to the substrate 5 and to maintain the substantially uniform interval.
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公开(公告)号：DE69905663D1
公开(公告)日：2003-04-10
申请号：DE69905663
申请日：1999-07-21
Applicant: IBM
Inventor： MURRAY CHRISTOPHER BRUCE , SUN SHOUHENG
IPC: B01F3/12 , B01J35/00 , B22F1/00 , B22F1/02 , H01F1/06 , B22F9/24 , B22F9/30 , B82B3/00 , H01F1/00 , H01F1/20 , H01F1/44
Abstract: A method of forming nanoparticles includes steps of forming a metal precursor solution from a transition metal, injecting the metal precursor solution to the surfactant solution, adding a flocculent to cause nanoparticles to precipitate out of solution without permanent agglomeration, and adding a hydrocarbon solvent to redisperse or repeptize the nanoparticles.
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公开(公告)号：DE69924794D1
公开(公告)日：2005-05-25
申请号：DE69924794
申请日：1999-07-21
Applicant: IBM
Inventor： BLACK CHARLES T , GATES STEPHEN M , MURRAY CHRISTOPHER B , SUN SHOUHENG
Abstract: A magnetic storage medium is disclosed which is formed from a layer of substantially uniformly spaced-apart magnetic nanoparticles of substantially uniform diameter disposed upon a surface of a substrate, with a coating, preferably of abrasion-resistant material, applied to adhere the nanoparticles to the substrate and to maintain their substantially uniform spaced-apart relationship. The nanoparticles are formed from a magnetic material selected from the group consisting of elements Co, Fe, Ni, Mn, Sm, Nd, Pr, Pt, Gd, an intermetallic compound of the aforesaid elements, a binary alloy of said elements, a ternary alloy of said elements, an oxide of Fe further comprising at least one of said elements other than Fe, barium ferrite, and strontium ferrite.
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Patent Agency Ranking
公开(公告)号：DE69905663T2
公开(公告)日：2003-11-20
申请号：DE69905663
申请日：1999-07-21
Applicant: IBM
Inventor： MURRAY CHRISTOPHER BRUCE , SUN SHOUHENG
IPC: B01F3/12 , B01J35/00 , B22F1/00 , H01F1/06 , B22F1/02 , B22F9/24 , B22F9/30 , B82B3/00 , H01F1/00 , H01F1/20 , H01F1/44
Abstract: A method of forming nanoparticles includes steps of forming a metal precursor solution from a transition metal, injecting the metal precursor solution to the surfactant solution, adding a flocculent to cause nanoparticles to precipitate out of solution without permanent agglomeration, and adding a hydrocarbon solvent to redisperse or repeptize the nanoparticles.
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公开(公告)号：AT233938T
公开(公告)日：2003-03-15
申请号：AT99305759
申请日：1999-07-21
Applicant: IBM
Inventor： MURRAY CHRISTOPHER BRUCE , SUN SHOUHENG
IPC: H01F1/06 , B01F3/12 , B01J35/00 , B22F1/00 , B22F1/02 , B22F9/24 , B22F9/30 , B82B3/00 , H01F1/00 , H01F1/20 , H01F1/44
Abstract: A method of forming nanoparticles includes steps of forming a metal precursor solution from a transition metal, injecting the metal precursor solution to the surfactant solution, adding a flocculent to cause nanoparticles to precipitate out of solution without permanent agglomeration, and adding a hydrocarbon solvent to redisperse or repeptize the nanoparticles.
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公开(公告)号：DE69924794T2
公开(公告)日：2006-03-09
申请号：DE69924794
申请日：1999-07-21
Applicant: IBM
Inventor： BLACK CHARLES T , GATES STEPHEN M , MURRAY CHRISTOPHER B , SUN SHOUHENG
Abstract: A magnetic storage medium is disclosed which is formed from a layer of substantially uniformly spaced-apart magnetic nanoparticles of substantially uniform diameter disposed upon a surface of a substrate, with a coating, preferably of abrasion-resistant material, applied to adhere the nanoparticles to the substrate and to maintain their substantially uniform spaced-apart relationship. The nanoparticles are formed from a magnetic material selected from the group consisting of elements Co, Fe, Ni, Mn, Sm, Nd, Pr, Pt, Gd, an intermetallic compound of the aforesaid elements, a binary alloy of said elements, a ternary alloy of said elements, an oxide of Fe further comprising at least one of said elements other than Fe, barium ferrite, and strontium ferrite.
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公开(公告)号：AT293829T
公开(公告)日：2005-05-15
申请号：AT99305758
申请日：1999-07-21
Applicant: IBM
Inventor： BLACK CHARLES T , GATES STEPHEN M , MURRAY CHRISTOPHER B , SUN SHOUHENG
Abstract: A magnetic storage medium is disclosed which is formed from a layer of substantially uniformly spaced-apart magnetic nanoparticles of substantially uniform diameter disposed upon a surface of a substrate, with a coating, preferably of abrasion-resistant material, applied to adhere the nanoparticles to the substrate and to maintain their substantially uniform spaced-apart relationship. The nanoparticles are formed from a magnetic material selected from the group consisting of elements Co, Fe, Ni, Mn, Sm, Nd, Pr, Pt, Gd, an intermetallic compound of the aforesaid elements, a binary alloy of said elements, a ternary alloy of said elements, an oxide of Fe further comprising at least one of said elements other than Fe, barium ferrite, and strontium ferrite.
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公开(公告)号：SG77260A1
公开(公告)日：2000-12-19
申请号：SG1999003648
申请日：1999-07-24
Applicant: IBM
Inventor： BLACK CHARLES T , SUN SHOUHENG , MURRAY CHRISTOPHER B , GATES STEPHEN M
Abstract: A magnetic storage medium is disclosed which is formed from a layer of substantially uniformly spaced-apart magnetic nanoparticles of substantially uniform diameter disposed upon a surface of a substrate, with a coating, preferably of abrasion-resistant material, applied to adhere the nanoparticles to the substrate and to maintain their substantially uniform spaced-apart relationship. The nanoparticles are formed from a magnetic material selected from the group consisting of elements Co, Fe, Ni, Mn, Sm, Nd, Pr, Pt, Gd, an intermetallic compound of the aforesaid elements, a binary alloy of said elements, a ternary alloy of said elements, an oxide of Fe further comprising at least one of said elements other than Fe, barium ferrite, and strontium ferrite.
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