CN100356452C - 涂敷型磁记录媒体的底层用粉末 - Google Patents
涂敷型磁记录媒体的底层用粉末 Download PDFInfo
- Publication number
- CN100356452C CN100356452C CNB038071029A CN03807102A CN100356452C CN 100356452 C CN100356452 C CN 100356452C CN B038071029 A CNB038071029 A CN B038071029A CN 03807102 A CN03807102 A CN 03807102A CN 100356452 C CN100356452 C CN 100356452C
- Authority
- CN
- China
- Prior art keywords
- powder
- coating
- iron oxide
- feooh
- recording medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/733—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the addition of non-magnetic particles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
Landscapes
- Magnetic Record Carriers (AREA)
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
羟基氧化铁的短轴截面比和包覆元素的种类和量 | 焙烧温度 | 氧化铁中的主要含有成分 | 粉体特性 | 涂料粘度 | 磁带评价 | |||||||||||||||||||
平均长轴长 | 平均短轴长 | 平均轴比 | 短轴截面比 | 比表面积(BET) | 粉体pH值 | 吸附特性 | 表面粗糙度() | 磁带耐久性 | ||||||||||||||||
短轴截面比 | Al | P | Y | ℃ | Al | P | Y | Na | 硬脂酸吸附量mg/m2 | MR吸附量mg/m2 | UR吸附量mg/m2 | mPa·s | 压光前() | 压光后() | 压光前后的变化率(%) | 钢球滑动 | ||||||||
(wt.%) | (wt96) | nm | nm | m2/g | 伤幅μm | 通过次数 | ||||||||||||||||||
比较例1 | 1.00 | 1 | - | - | 650 | 0.95 | - | - | 0.011 | 88 | 16 | 5.5 | 1.00 | 53 | 8.7 | 1.8 | 0.9 | 2.3 | 190 | 380 | 250 | 42 | 270 | 430 |
实施例1 | 1.55 | 1 | - | - | 650 | 0.95 | - | - | 0.010 | 92 | 16 | 5.8 | 1.45 | 55 | 9.0 | 1.9 | 0.9 | 2.3 | 210 | 330 | 133 | 60 | 230 | 660 |
实施例2 | 1.65 | - | 2 | - | 650 | - | 1.4 | - | 0.011 | 93 | 15 | 6.2 | 1.55 | 57 | 5.6 | 0.8 | 1.0 | 2.3 | 230 | 285 | 115 | 60 | 180 | 910 |
实施例3 | 1.75 | - | 2 | - | 650 | - | 1.4 | - | 0.012 | 112 | 16 | 7.0 | 1.65 | 59 | 5.2 | 0.9 | 1.0 | 2.3 | 240 | 255 | 90 | 65 | 170 | 990 |
实施例4 | 2.00 | - | 2 | - | 650 | - | 1.4 | - | 0.011 | 105 | 18 | 5.8 | 1.80 | 61 | 5.5 | 0.9 | 1.0 | 2.2 | 320 | 220 | 60 | 73 | 130 | 1130 |
实施例5 | 2.00 | - | 2 | 1 | 650 | - | 1.3 | 1.1 | 0.010 | 110 | 18 | 6.1 | 1.90 | 62 | 5.5 | 0.9 | 1.0 | 2.3 | 360 | 160 | 40 | 75 | 120 | 1230 |
多层结构磁带 | 所使用的底层用粉末 | 表面平滑性粗糙度() | 电磁变换特性 | 磁带耐久性钢球滑动通过次数 | |
输出 | C/N | ||||
实施例6 | 实施例5 | 95 | +1.5dB | +3.5dB | 1320次 |
实施例7 | 实施例1 | 190 | +0.7dB | +1.7dB | 960次 |
比较例2 | 比较例1 | 360 | 0dB | 0dB | 640次 |
羟基氧化铁的短轴截面比和包覆元素的种类和量 | 焙烧温度 | 氧化铁中的主要含有成分 | 粉体特性 | 涂料粘度 | 磁带评价 | |||||||||||||||||||
平均长轴长 | 平均短轴长 | 平均轴比 | 短轴截面比 | 比表面积(BET) | 粉体pH值 | 吸附特性 | 表面粗糙度() | 磁带耐久性 | ||||||||||||||||
短轴截面比 | Al | P | Y | ℃ | Al | P | Y | Na | 硬脂酸吸附量mg/m2 | MR吸附量mg/m2 | UR吸附量mg/m2 | mPa·s | 压光前() | 压光后() | 压光前后的变化率(%) | 钢球滑动 | ||||||||
(wt.%) | (wt%) | nm | nm | m2/g | 伤幅μm | 通过次数 | ||||||||||||||||||
实施例8 | 1.60 | - | 2.0 | 1.0 | 650 | - | 1.3 | 1.1 | 0.011 | 25 | 9 | 2.8 | 1.30 | 95 | 5.4 | 0.7 | 1.0 | 2.1 | 730 | 340 | 145 | 57 | 130 | 1190 |
实施例9 | 2.10 | - | 2.0 | 1.0 | 650 | - | 1.3 | 1.1 | 0.011 | 190 | 28 | 6.8 | 1.95 | 41 | 5.5 | 0.9 | 1.0 | 2.3 | 200 | 290 | 140 | 52 | 120 | 1250 |
实施例10 | 1.80 | - | 2.0 | - | 650 | - | 1.3 | - | 0.011 | 100 | 20 | 5.0 | 1.70 | 53 | 5.4 | 0.9 | 1.0 | 2.3 | 280 | 230 | 70 | 70 | 135 | 1100 |
实施例11 | 2.05 | - | 2.0 | 0.2 | 650 | - | 1.3 | 0.2 | 0.011 | 105 | 19 | 5.5 | 1.90 | 58 | 5.3 | 0.9 | 1.0 | 2.3 | 340 | 180 | 60 | 67 | 125 | 1280 |
实施例12 | 2.00 | - | 2.0 | 8.2 | 650 | - | 1.3 | 9.0 | 0.011 | 110 | 18 | 6.1 | 1.90 | 82 | 5.5 | 0.7 | 1.0 | 2.3 | 670 | 220 | 120 | 45 | 125 | 1210 |
实施例13 | 1.90 | - | 0.3 | 1.0 | 650 | - | 0.2 | 1.1 | 0.011 | 105 | 20 | 5.3 | 1.80 | 53 | 6.9 | 1.1 | 1.0 | 2.3 | 280 | 140 | 55 | 61 | 160 | 900 |
实施例14 | 2.10 | - | 7.0 | 1.0 | 650 | - | 4.5 | 1.1 | 0.011 | 110 | 18 | 6.1 | 1.90 | 92 | 3.2 | 0.7 | 1.0 | 2.3 | 740 | 170 | 80 | 53 | 125 | 1240 |
比较例3 | 1.45 | - | 2.0 | 1.0 | 650 | - | 1.3 | 1.1 | 0.011 | 15 | 6 | 2.5 | 1.20 | 112 | 5.5 | 0.7 | 1.0 | 2.1 | 930 | 由于不能分散而不能制带 | ||||
比较例4 | 2.30 | - | 2.0 | 1.0 | 650 | - | 1.3 | 1.1 | 0.011 | 250 | 33 | 7.8 | 2.10 | 29 | 5.3 | 0.9 | 1.0 | 2.3 | 160 | 390 | 225 | 42 | 115 | 1260 |
比较例5 | 2.05 | - | 2.0 | 14.0 | 650 | - | 1.3 | 15.0 | 0.011 | 110 | 18 | 6.1 | 1.90 | 93 | 5.5 | 0.7 | 1.0 | 2.3 | 840 | 350 | 220 | 37 | 130 | 1250 |
比较例6 | 2.05 | - | 8.6 | 1.0 | 650 | - | 5.5 | 1.1 | 0.011 | 110 | 18 | 6.1 | 1.90 | 102 | 2.6 | 0.7 | 1.0 | 2.3 | 920 | 360 | 210 | 42 | 120 | 1250 |
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002101444 | 2002-04-03 | ||
JP101444/2002 | 2002-04-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1643578A CN1643578A (zh) | 2005-07-20 |
CN100356452C true CN100356452C (zh) | 2007-12-19 |
Family
ID=29241815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB038071029A Expired - Fee Related CN100356452C (zh) | 2002-04-03 | 2003-04-02 | 涂敷型磁记录媒体的底层用粉末 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7238438B2 (zh) |
EP (1) | EP1492088B1 (zh) |
CN (1) | CN100356452C (zh) |
DE (1) | DE60314383T2 (zh) |
WO (1) | WO2003088218A1 (zh) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4296350B2 (ja) * | 2004-08-23 | 2009-07-15 | Dowaエレクトロニクス株式会社 | 磁気記録媒体用非磁性粉末およびその製造方法ならびにこれを用いた磁気記録媒体 |
US7641990B2 (en) * | 2005-06-27 | 2010-01-05 | Dowa Electronics Materials Co., Ltd. | Iron compound particles and magnetic recording medium using same |
US7703942B2 (en) * | 2006-08-31 | 2010-04-27 | Rensselaer Polytechnic Institute | High-efficient light engines using light emitting diodes |
CN101511886A (zh) * | 2006-09-05 | 2009-08-19 | 昭和电工株式会社 | 有机电致发光元件及其用途 |
US8682502B2 (en) * | 2007-03-28 | 2014-03-25 | Irobot Corporation | Remote vehicle control system and method |
JP4389955B2 (ja) * | 2007-03-30 | 2009-12-24 | Tdk株式会社 | 磁気記録媒体及びその製造方法 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0660362A (ja) * | 1992-08-07 | 1994-03-04 | Toda Kogyo Corp | 磁気記録媒体用下地層 |
JPH0922524A (ja) * | 1995-07-06 | 1997-01-21 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
JPH10340447A (ja) * | 1997-06-05 | 1998-12-22 | Dowa Mining Co Ltd | 塗布型磁気記録媒体の下層用粉末 |
JPH11273056A (ja) * | 1998-03-25 | 1999-10-08 | Tdk Corp | 磁気記録媒体及びその製造方法 |
JP2000143250A (ja) * | 1998-11-04 | 2000-05-23 | Toda Kogyo Corp | 磁気記録媒体の非磁性下地層用非磁性粒子粉末及びその製造法並びに磁気記録媒体 |
CN1285078A (zh) * | 1998-12-18 | 2001-02-21 | 同和矿业株式会社 | 铁磁性粉末 |
JP2001176058A (ja) * | 1999-12-15 | 2001-06-29 | Dowa Mining Co Ltd | 塗布型磁気記録媒体の下層用粉末およびその製造法 |
JP2001243619A (ja) * | 2000-02-28 | 2001-09-07 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
JP2002074646A (ja) * | 2000-08-29 | 2002-03-15 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0693297B2 (ja) | 1987-01-30 | 1994-11-16 | 富士写真フイルム株式会社 | 磁気記録媒体 |
US5069983A (en) * | 1988-12-06 | 1991-12-03 | Nihon Shinku Gijutsu Kabushiki Kaisha | Magnetic recording member |
DE68923544T2 (de) * | 1988-12-29 | 1996-03-28 | Toda Kogyo Corp | Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung. |
DE3912976A1 (de) * | 1989-04-20 | 1990-10-25 | Basf Ag | Nadelfoermige, kobaltmodifizierte eisenoxide und verfahren zu ihrer herstellung |
JPH04167225A (ja) | 1990-10-31 | 1992-06-15 | Victor Co Of Japan Ltd | 磁気記録媒体 |
JPH0560362A (ja) * | 1991-09-02 | 1993-03-09 | Mitsubishi Heavy Ind Ltd | 空気調和機の制御方法 |
JP3396821B2 (ja) | 1992-10-13 | 2003-04-14 | コニカ株式会社 | 磁気記録媒体 |
JP2946262B2 (ja) | 1992-10-22 | 1999-09-06 | 富士写真フイルム株式会社 | 磁気記録媒体 |
JP2924941B2 (ja) | 1993-12-27 | 1999-07-26 | 戸田工業株式会社 | 磁気記録媒体用下地層 |
JPH08138241A (ja) * | 1994-11-04 | 1996-05-31 | Tdk Corp | 磁気記録媒体の製造方法 |
JP3509837B2 (ja) | 1995-10-20 | 2004-03-22 | 戸田工業株式会社 | 鉄を主成分とする金属磁性粒子粉末を使用している磁気記録媒体の非磁性下地層用ヘマタイト粒子粉末、該ヘマタイト粒子粉末を用いた磁気記録媒体の非磁性下地層、該非磁性下地層を用いた磁気記録媒体並びに該ヘマタイト粒子粉末の製造法 |
JP3838693B2 (ja) | 1996-03-21 | 2006-10-25 | 同和鉱業株式会社 | 塗布型磁気記録媒体の下地層用粉末 |
JP4139873B2 (ja) | 1996-08-05 | 2008-08-27 | Dowaエレクトロニクス株式会社 | 塗布型磁気記録媒体の下層用粉末 |
JPH1069629A (ja) * | 1996-08-27 | 1998-03-10 | Dowa Mining Co Ltd | 重層構造の塗布型磁気記録媒体 |
JP3832539B2 (ja) * | 1998-01-12 | 2006-10-11 | 戸田工業株式会社 | 磁気記録媒体 |
JPH11353637A (ja) * | 1998-04-10 | 1999-12-24 | Toda Kogyo Corp | 非磁性下地層用針状ヘマタイト粒子粉末及び該針状ヘマタイト粒子粉末を用いた非磁性下地層を有する磁気記録媒体 |
WO2000038181A1 (fr) | 1998-12-18 | 2000-06-29 | Dowa Mining Co., Ltd. | Poudre de sous-couche pour support d'enregistrement magnetique de type revetement et procede de production |
JP4732556B2 (ja) * | 1999-01-29 | 2011-07-27 | 戸田工業株式会社 | 磁気記録媒体の非磁性下地層用非磁性粒子粉末及びその製造法並びに磁気記録媒体 |
JP4305589B2 (ja) * | 1999-05-24 | 2009-07-29 | 戸田工業株式会社 | 磁気記録媒体の非磁性下地層用非磁性粒子粉末及びその製造法並びに磁気記録媒体 |
US6475598B1 (en) * | 1999-06-24 | 2002-11-05 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
JP2001297428A (ja) | 2000-02-10 | 2001-10-26 | Tdk Corp | 磁気記録媒体およびその製造方法 |
JP2001344738A (ja) | 2000-05-26 | 2001-12-14 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
US6534168B2 (en) * | 2000-08-25 | 2003-03-18 | Fuji Photo Film Co., Ltd. | Magnetic recording medium comprising a lower layer containing specific flat acicular α-iron oxide powder |
EP1492089B1 (en) * | 2002-04-03 | 2007-06-06 | Dowa Mining Co., Ltd. | Powder for sublayer of coating type magnetic recording medium and magnetic recording medium comprising the same |
-
2003
- 2003-04-02 DE DE60314383T patent/DE60314383T2/de not_active Expired - Lifetime
- 2003-04-02 EP EP03746416A patent/EP1492088B1/en not_active Expired - Fee Related
- 2003-04-02 CN CNB038071029A patent/CN100356452C/zh not_active Expired - Fee Related
- 2003-04-02 US US10/508,033 patent/US7238438B2/en not_active Expired - Lifetime
- 2003-04-02 WO PCT/JP2003/004214 patent/WO2003088218A1/ja active IP Right Grant
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0660362A (ja) * | 1992-08-07 | 1994-03-04 | Toda Kogyo Corp | 磁気記録媒体用下地層 |
JPH0922524A (ja) * | 1995-07-06 | 1997-01-21 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
JPH10340447A (ja) * | 1997-06-05 | 1998-12-22 | Dowa Mining Co Ltd | 塗布型磁気記録媒体の下層用粉末 |
JPH11273056A (ja) * | 1998-03-25 | 1999-10-08 | Tdk Corp | 磁気記録媒体及びその製造方法 |
JP2000143250A (ja) * | 1998-11-04 | 2000-05-23 | Toda Kogyo Corp | 磁気記録媒体の非磁性下地層用非磁性粒子粉末及びその製造法並びに磁気記録媒体 |
CN1285078A (zh) * | 1998-12-18 | 2001-02-21 | 同和矿业株式会社 | 铁磁性粉末 |
JP2001176058A (ja) * | 1999-12-15 | 2001-06-29 | Dowa Mining Co Ltd | 塗布型磁気記録媒体の下層用粉末およびその製造法 |
JP2001243619A (ja) * | 2000-02-28 | 2001-09-07 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
JP2002074646A (ja) * | 2000-08-29 | 2002-03-15 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
Also Published As
Publication number | Publication date |
---|---|
DE60314383D1 (de) | 2007-07-26 |
EP1492088B1 (en) | 2007-06-13 |
EP1492088A4 (en) | 2005-04-13 |
CN1643578A (zh) | 2005-07-20 |
EP1492088A1 (en) | 2004-12-29 |
DE60314383T2 (de) | 2008-02-21 |
WO2003088218A1 (fr) | 2003-10-23 |
US7238438B2 (en) | 2007-07-03 |
US20050129945A1 (en) | 2005-06-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR100565886B1 (ko) | 강자성 분말 | |
CN100356452C (zh) | 涂敷型磁记录媒体的底层用粉末 | |
EP0827137B1 (en) | Coating type magnetic recording medium having a multilayer structure | |
US6120898A (en) | Hematite particles and magnetic recording medium using hematite particles as non-magnetic particles for a non-magnetic undercoat layer | |
JP3903139B2 (ja) | 塗布型磁気記録媒体の下層用粉末 | |
CN100359568C (zh) | 涂敷型磁记录媒体的底层用粉末与使用该粉末的磁记录媒体 | |
US6171692B1 (en) | Particle for lower layer of coating type magnetic recording medium | |
EP1643493B1 (en) | Powder for lower layer of application type of layered magnetic recording medium and magnetic recording medium using the same | |
EP0928775B1 (en) | Acicular hematite particles and magnetic recording medium | |
US6063490A (en) | Magnetic recording medium comprising non-magnetic acicular particles containing mainly iron and having titanium dispersed therein | |
EP0919522B1 (en) | Acicular hematite particles for non-magnetic undercoat layer of magnetic recording medium | |
JP4669913B2 (ja) | 強磁性粉末 | |
EP1231599A1 (en) | Magnetic recording medium and magnetic composite particles for magnetic recording medium | |
US6153296A (en) | Acicular hematite particles and magnetic recording medium | |
US6159592A (en) | Magnetic recording medium | |
JP2004005931A (ja) | 塗布型磁気記録媒体の下層用粉末およびこれを用いた磁気記録媒体 | |
JP2004005932A (ja) | 塗布型磁気記録媒体の下層用粉末 | |
JP4732555B2 (ja) | 磁気記録媒体の非磁性下地層用非磁性粒子粉末及びその製造法並びに磁気記録媒体 | |
JPH11161939A (ja) | 非磁性下地層を有する磁気記録媒体用基体及び該基体を用いた磁気記録媒体 | |
JPH11250446A (ja) | 磁気記録媒体の非磁性下地層用針状ヘマタイト粒子粉末及び磁気記録媒体 | |
JPH11161940A (ja) | 磁気記録媒体 | |
JPH1173632A (ja) | 磁気記録媒体 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
ASS | Succession or assignment of patent right |
Owner name: DOWA ELECTRONICS MATERIALS CO. Free format text: FORMER OWNER: TONGHE STOCK ( GROUP ) CO., LTD. Effective date: 20071207 |
|
C41 | Transfer of patent application or patent right or utility model | ||
C56 | Change in the name or address of the patentee |
Owner name: TONGHE STOCK ( GROUP ) CO., LTD. Free format text: FORMER NAME OR ADDRESS: DOWA MINING CO., LTD. |
|
CP03 | Change of name, title or address |
Address after: Tokyo, Japan Patentee after: Tonghe holding (Group) Co.,Ltd. Address before: Tokyo, Japan Patentee before: Dowa Mining Co.,Ltd. |
|
TR01 | Transfer of patent right |
Effective date of registration: 20071207 Address after: Tokyo, Japan Patentee after: DOWA ELECTRONICS MATERIALS Co.,Ltd. Address before: Tokyo, Japan Patentee before: Tonghe holding (Group) Co.,Ltd. |
|
C17 | Cessation of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071219 Termination date: 20120402 |