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公开(公告)号：US20140212693A1
公开(公告)日：2014-07-31
申请号：US14168740
申请日：2014-01-30
Applicant: FUJIFILM Corporation
Inventor： Yasushi HATTORI
CPC classification number: G11B5/70615 , G11B5/7013 , G11B5/702 , G11B5/70642 , G11B5/733
Abstract: The magnetic recording medium includes a magnetic layer containing a ferromagnetic powder and a binder on a nonmagnetic support, wherein the ferromagnetic powder is an ε-iron oxide powder, and the magnetic layer comprises a compound comprising at least one substituent selected from the group consisting of a hydroxyl group and a quaternary ammonium salt group.
Abstract translation: 磁记录介质包括在非磁性载体上含有铁磁性粉末和粘合剂的磁性层，其中铁磁性粉末是氧化铁粉末，磁性层包含至少一种选自以下的取代基的化合物： 的羟基和季铵盐基团。
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公开(公告)号：US20140314658A1
公开(公告)日：2014-10-23
申请号：US14258739
申请日：2014-04-22
Applicant: FUJIFILM CORPORATION
Inventor： Yasushi HATTORI
CPC classification number: C01G49/06 , C01G49/0036 , C01G49/02 , C01P2004/64 , C01P2004/84 , C01P2006/42 , G11B5/712 , H01F1/112
Abstract: The method of manufacturing magnetic particles, wherein the magnetic particles are magnetic particles for magnetic recording, and includes subjecting starting material magnetic particles to glass component-adhering treatment to be adhered with a glass component, and subjecting the magnetic particles after the glass component-adhering treatment to coercive force-reducing treatment with heating, to provide magnetic particles having lower coercive force than the starting material magnetic particles.
Abstract translation: 制造磁性粒子的方法，其中磁性粒子是用于磁记录的磁性粒子，并且包括使起始材料磁性粒子进行玻璃成分粘附处理以与玻璃成分粘附，并且在玻璃成分粘附之后对磁性粒子进行处理 通过加热进行矫顽力减少处理，以提供比起始材料磁性颗粒具有较低矫顽力的磁性颗粒。
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公开(公告)号：US20140091501A1
公开(公告)日：2014-04-03
申请号：US14040041
申请日：2013-09-27
Applicant: FUJIFILM Corporation
Inventor： Yasushi HATTORI , Kazufumi OMURA
IPC: C01G49/00
CPC classification number: C01G49/0018 , B82Y30/00 , C01G49/0036 , C01P2002/76 , C01P2004/64 , C01P2006/42 , G11B5/70678 , G11B5/842
Abstract: The method of manufacturing hexagonal ferrite magnetic particles, which includes providing hexagonal ferrite magnetic particles by conducting calcination of particles comprising an alkaline earth metal salt and an iron salt to cause ferritization; and further includes causing a glass component to adhere to the particles and then conducting the calcination of the particles to form a calcined product in which hexagonal ferrite is detected as a principal component in X-ray diffraction analysis; and removing the glass component from a surface of the calcined product that has been formed.
Abstract translation: 制造六方晶系铁氧体磁性颗粒的方法，其包括通过对包含碱土金属盐和铁盐的颗粒进行煅烧来提供六方晶系铁氧体磁性颗粒以引起铁素体化; 进一步包括使玻璃成分附着在粒子上，然后进行粒子的煅烧，形成在X射线衍射分析中检测出六方晶系铁氧体作为主要成分的煅烧产物。 以及从形成的煅烧产物的表面除去玻璃成分。
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Patent Agency Ranking
公开(公告)号：US20150010466A1
公开(公告)日：2015-01-08
申请号：US14324857
申请日：2014-07-07
Applicant: FUJIFILM Corporation
Inventor： Yasushi HATTORI , Yoshinori TAMADA
CPC classification number: H01F1/01 , C01G49/0036 , C01P2004/64 , C01P2006/42 , H01F1/348 , H01F1/36
Abstract: The method of manufacturing hexagonal ferrite magnetic particles comprises applying, in a water-based solution, an adhering matter comprising a glass component and an alkaline earth metal to iron oxide particles to which a surfactant adheres, and calcining the iron oxide particles to which the adhering matter adheres to obtain a calcined product in which a main component that is detected by X-ray diffraction analysis is hexagonal ferrite.
Abstract translation: 制造六方晶系铁氧体磁性颗粒的方法包括在水性溶液中将包含玻璃组分和碱土金属的粘附物施加到表面活性剂附着的氧化铁颗粒上，并煅烧氧化铁颗粒， 物质粘附以获得其中通过X射线衍射分析检测的主要成分是六方铁素体的煅烧产物。
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公开(公告)号：US20150010698A1
公开(公告)日：2015-01-08
申请号：US14324852
申请日：2014-07-07
Applicant: FUJIFILM CORPORATION
Inventor： Yasushi HATTORI , Yoshinori TAMADA
CPC classification number: G11B5/653 , G11B5/70678 , H01F1/11
Abstract: The method of manufacturing hexagonal ferrite magnetic particles comprises applying an adhering matter comprising a glass component and an alkaline earth metal to hexagonal ferrite magnetic particles, and subjecting the hexagonal ferrite magnetic particles to which the adhering matter has been applied to a heat treatment.
Abstract translation: 制造六方晶系铁氧体磁性颗粒的方法包括将包含玻璃组分和碱土金属的粘合物施加到六方晶系铁氧体磁性颗粒上，并对已经施加粘附物质的六方晶系铁氧体磁性颗粒进行热处理。
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公开(公告)号：US20140219069A1
公开(公告)日：2014-08-07
申请号：US14171927
申请日：2014-02-04
Applicant: FUJIFILM Corporation
Inventor： Yasushi HATTORI , Hidehiro MOCHIZUKI , Toshio SASAKI
CPC classification number: G11B5/7305 , G11B5/70642 , G11B5/70678 , G11B5/738 , G11B2005/0021
Abstract: The magnetic recording medium is a particulate magnetic recording medium for heat-assisted recording, as well as includes a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic organic material support and a heat-diffusing layer of higher thermal conductivity than the magnetic layer between the nonmagnetic organic material support and the magnetic layer.
Abstract translation: 磁记录介质是用于热辅助记录的颗粒状磁记录介质，并且包括在非磁性有机材料载体上包含铁磁粉末和粘合剂的磁性层，以及具有比磁性层之间的磁性层更高导热性的热扩散层 非磁性有机材料和磁性层。
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7.发明申请公开(公告)号：US20140151595A1
公开(公告)日：2014-06-05
申请号：US14093884
申请日：2013-12-02
Applicant: FUJIFILM Corporation
Inventor： Yasushi HATTORI , Kazufumi OMURA
CPC classification number: G11B5/70678 , C01G49/0036 , C01P2002/76 , C01P2004/64 , C01P2006/42 , H01F1/11
Abstract: The method of manufacturing hexagonal ferrite magnetic particles includes providing hexagonal ferrite magnetic particles by conducting calcination of particles comprising an iron salt and an alkaline earth metal salt to cause ferritization; and further includes preparing the particles comprising an iron salt and an alkaline earth metal salt by adhering a glass component, followed by the alkaline earth metal salt, to the iron salt; and conducting calcination of the particles prepared to form a calcined product in which hexagonal ferrite is detected as a principal component in X-ray diffraction analysis.
Abstract translation: 制造六方晶系铁氧体磁性颗粒的方法包括：通过对包含铁盐和碱土金属盐的颗粒进行煅烧来提供六方晶系铁氧体磁性颗粒以引起铁素体化; 并且还包括通过将玻璃组分，然后将碱土金属盐粘附到铁盐上来制备包含铁盐和碱土金属盐的颗粒; 对X射线衍射分析中的六方晶系铁氧体进行煅烧，形成以六方晶系铁氧体为主成分的煅烧体。
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公开(公告)号：US20130084470A1
公开(公告)日：2013-04-04
申请号：US13632627
申请日：2012-10-01
Applicant: FUJIFILM CORPORATION
Inventor： Yasushi HATTORI , Ryota SUZUKI , Norihito KASADA
CPC classification number: G11B5/7013 , G11B5/70678 , G11B5/7085
Abstract: An aspect of the present invention relates to a magnetic recording medium comprising a magnetic layer containing a ferromagnetic powder and a binder on a nonmagnetic support, wherein the ferromagnetic powder has a hexagonal ferrite structure, the magnetic layer comprises a coefficient of friction-lowering component in the form of nonmagnetic inorganic particles, and a compound in which a substituent selected from the group consisting of a hydroxyl group and a carboxyl group is directly substituted on an aromatic ring.
Abstract translation: 本发明的一个方面涉及一种包括在非磁性载体上含有铁磁粉末和粘合剂的磁性层的磁记录介质，其中所述铁磁性粉末具有六边形铁氧体结构，所述磁性层包括摩擦降低成分系数 非磁性无机颗粒的形式，其中选自羟基和羧基的取代基在芳环上直接取代的化合物。
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