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101. 发明专利

JPS5921366B2 失效
公开(公告)号：JPS5921366B2
公开(公告)日：1984-05-19
申请号：JP10234079
申请日：1979-08-10
申请人： TODA KOGYO CORP
发明人： HORIISHI NANAO , TAKEDOI ATSUSHI , MUKOZAKA AKIRA
IPC分类号： G11B5/62 , B22F9/20 , B22F9/22 , C01G49/00 , C01G49/02 , C09D5/23 , C09D7/12 , H01F1/06

102. 发明专利

JPS5941806A Manufacture of tabular ba ferrite particle powder for magnetic recording 失效
标题翻译：制造用于磁记录的白色颗粒粉末颗粒粉末
公开(公告)号：JPS5941806A
公开(公告)日：1984-03-08
申请号：JP15244882
申请日：1982-08-31
申请人： Res Inst For Prod Dev , Toda Kogyo Corp
发明人： NAGAI NORIMICHI , HORIISHI NANAO , KIYAMA MASAO , TAKADA TOSHIO
IPC分类号： C01G49/00 , C09D5/23 , C09D7/12 , G11B5/706 , H01F1/11
CPC分类号： G11B5/70678
摘要： PURPOSE: To obtain the tabular Ba ferrite particle powder, coercive force thereof is small and which is suitable for vertical magnetic recording, by thermally treating an alkaline suspension, in which specific acicular α-FeO(OH) particles and Ba ion atoms are suspended, by water within a specific temperature range.
CONSTITUTION: The alkaline suspension in which acicular α-FeO(OH) particles of a 15W18m
2 /g specific surface, not more than 0.08g/m
3 apparent density and not more than 0.2g/cm
3 tap density and Ba ion atoms are suspended so that Fe(III) is brought to the rate of 6W8 atoms to one Ba ion atom is prepared. α-FeO(OH) Particles are changed into the tabular Ba ferrite particles having a 2W4m
2 /g specific surface, a 42W47emu/g magnetization value and 600W800 Oe coercive force by thermally treating the suspension by water within a temperature range of 280W320°C. Regarding reaction conditions, a Ba/Fe(III) ratio approaches to 8 as pH and a reaction temperature increase while the growth of Ba ferrite particles is promoted.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：为了获得片状Ba铁氧体颗粒粉末，通过热处理其中悬浮特定针状α-FeO（OH）颗粒和Ba离子原子的碱性悬浮液，其矫顽力小，适用于垂直磁记录，通过特定温度范围内的水。构成：具有15-18m 2 / g比表面积的针状α-FeO（OH）颗粒，表观密度不超过0.08g / m 3，不大于0.2g / cm 3的碱性悬浮液 >振实密度和Ba离子原子被悬浮，使得Fe（III）被制成速率为6-8个原子至一个Ba离子原子。通过将水悬浮液进行热处理，将α-FeO（OH）颗粒变成具有2-4m 2 / g比表面积，42-47emu / g磁化值和600-800Oe矫顽力的片状Ba铁氧体颗粒在280-320摄氏度的温度范围内。关于反应条件，Ba / Fe（III）比接近8作为pH，反应温度升高，同时促进Ba铁氧体颗粒的生长。

103. 发明专利

JPS5853687B2 JPS5853687B2 - 失效
公开(公告)号：JPS5853687B2
公开(公告)日：1983-11-30
申请号：JP6829979
申请日：1979-05-31
申请人： Toda Kogyo Corp
发明人： HORIISHI NANAO , TAKEDOI ATSUSHI , MUKOZAKA AKIRA
IPC分类号： G11B5/62 , B22F1/00 , B22F9/20 , B22F9/22 , C09D5/23 , C09D7/12 , C22C38/00 , H01F1/06

104. 发明专利

JPS58178507A Granular spinel type iron oxide particle powder for magnetically isotropic magnetic recording medium and manufacture therefor 失效
标题翻译：用于磁性等磁记录介质及其制造的颗粒型螺旋型氧化铁颗粒粉末
公开(公告)号：JPS58178507A
公开(公告)日：1983-10-19
申请号：JP6293682
申请日：1982-04-13
申请人： Toda Kogyo Corp
发明人： MORI KEIZOU , HORIISHI NANAO
IPC分类号： C01G49/02 , C09D5/23 , C09D7/12 , G11B5/706 , H01F1/11
CPC分类号： G11B5/70642
摘要： PURPOSE:To obtain the magnetic recording medium devoid of fluctuations in reproduced output having excellent high output characteristics by a method wherein granular magnetic Fe2O4 particle is treated as a starting material and used as alpha-Fe2O3 particle, and then it is reduced by heat or by reoxidization if necessary. CONSTITUTION:The granular spinel type iron oxide particle powder, to be used for magnetically isotropic magnetic recording medium consisting of granular spinel type iron oxide particle having magnetic characteristics of magnetic coercive force of Hc250e and saturated magnetization of deltas70emu/g or above, and the granular magnetite particle which is synthesized from the aqueous solution containing Fe are used as starting materials. The above materials are formed into alpha-Fe2O3 particles by performing oxidization under heat of the temperature range of 600-850 deg.C in an oxidizing atmosphere. Then, they are reduced by heat of 250-450 deg.C in a reducing atmosphere, and besides, reoxidized in the temperature range of 150-400 deg.C in an oxidizing atmosphere if necessary. Through these procedures, the magnetic recording medium having no fluctuations in regenerated output and which is suitable for a floppy disk can be obtained.
摘要翻译：目的：通过将粒状磁性Fe 2 O 4颗粒作为原料处理并用作α-Fe 2 O 3颗粒的方法获得具有优异的高输出特性的再现输出中没有波动的磁记录介质，然后通过加热或通过必要时进行再氧化。构成：用于磁性各向同性磁记录介质的粒状尖晶石型氧化铁颗粒粉末，该磁性各向同性磁记录介质由具有Hc250e的磁矫顽力和饱和磁化强度为deltas70emu / g以上的磁性特征的粒状尖晶石型氧化铁颗粒和粒状使用由含Fe 2+的水溶液合成的磁铁矿颗粒作为原料。上述材料通过在氧化气氛中在600-850摄氏度的温度范围内进行氧化，形成α-Fe2O3颗粒。然后，在还原气氛中通过250-450℃的热量还原，并且如果需要，在氧化气氛中，在150-400℃的温度范围内再氧化。通过这些程序，可以获得没有再生输出的波动并且适合于软盘的磁记录介质。

105. 发明专利

JPS58171801A PREPARATION OF ACICULAR CRYSTALLINE FERROMAGNETIC POWDER 失效
公开(公告)号：JPS58171801A
公开(公告)日：1983-10-08
申请号：JP5403882
申请日：1982-03-31
申请人： TODA KOGYO CORP
发明人： NAGAI NORIMICHI , KIYAMA MASAO , TAKADA TOSHIO , HORIISHI NANAO
IPC分类号： G11B5/706 , B22F9/22 , C09D5/23 , C09D7/12 , H01F1/06
摘要： PURPOSE:To increase the specific surface area of acicular crystalline beta-iron hydroxide powder by a method wherein prescribed mol% of ferrous salt against the total iron is added to a ferrous chloride aqueous solution, which is then oxidized. CONSTITUTION:In generating acicular crystalline beta-iron hydroxide particles by causing the gas containing oxygen to move in and out a ferrous chloride aqueous solution so as to oxidize the solution, 0.1-15mol% of ferrous salt against the total iron in terms of Fe is added to the ferrous chloride aqueous solution. Then the acicular crystalline beta-iron hydroxide particles is generated by oxidizing the solution. Subsequently, the acicular crystalline beta-iron hydroxide powder is allowed to contain 0.5-5.0% sulfate by weight in terms of SO4 per particle before being heat-fired within the temperature range of 300-500 deg.C in the air to prepare acicular crystalline alpha-Fe2O3 particles. Next the particles are heat-deoxidized in a reducing gas to produce acicular crystalline iron magnetic particles.

106. 发明专利

JPS5841647B2 失效
公开(公告)号：JPS5841647B2
公开(公告)日：1983-09-13
申请号：JP5277379
申请日：1979-04-28
申请人： TODA KOGYO CORP
发明人： YAMAMOTO SHIGEHISA , HORIISHI NANAO , TAKADA TOSHIO , BANDO HISANORI
IPC分类号： C01G49/00 , H01F1/11

107. 发明专利

JPS5814368B2 失效
公开(公告)号：JPS5814368B2
公开(公告)日：1983-03-18
申请号：JP3985078
申请日：1978-04-03
申请人： TODA KOGYO CORP
发明人： HORIISHI NANAO , OKUDA YOSHIRO , HARADA TOSHIHARU , TODA KOJI
IPC分类号： C01G49/08 , C01G49/00 , C01G51/00 , H01F1/10 , H01F1/11

108. 发明专利

JPS57160917A MANUFACTURE OF NEEDLELIKE MAGNETIC IRON OXIDE POWDER 失效
公开(公告)号：JPS57160917A
公开(公告)日：1982-10-04
申请号：JP4880481
申请日：1981-03-30
申请人： TODA KOGYO CORP
发明人： TAKEDOI ATSUSHI , KONDOU HIROYUKI , JIKUHARA NARIYASU , ISOAI MASARU , TAKAMA KAZUSHI , HORIISHI NANAO
IPC分类号： C01G49/00 , H01F1/11
摘要： PURPOSE:To obtain the titled powder having high coercive force with a very small amount of Co or Co and Fe (II) by adding Co to needlelike magnetite or maghemite particles after introducing Mg into the particles. CONSTITUTION:An aqueous ferrous salt soln. is reacted with an aqueous alkali sonl. to prepare a suspension of >=11pH contg. Fe(OH)2, and by blowing a gas contg. O2 into the suspension, needlelike alpha-FeOOH particles are formed by oxidation. Prior to the oxidation, to the suspension is added a water soluble Mg salt by 0.5-0.7 atomic% as Mg to the total amount of Fe. Thus, needlelike alpha-FeOOH particles having 0.3-2.0mum average major axis and 20:>=1 average ratio of major axis; minor axis and contg. Mg by 0.5-0.7 atomic% to the total amount of Fe are formed. The particles are washed, separated by filtration, dried, and heat reduced. The resulting needlelike magnetite particles contg. Mg or needlelike maghemite particles obtd. by oxidizing the magnetite particles are modified with Co or Co and Fe (II).

109. 发明专利

JPS57120308A Manufacture of vertical magnetic recording hexagonal planar magnet plumbite type ferrite particle powder 失效
标题翻译：垂直磁记录六边形平面磁铁颗粒型粉红颗粒粉末的制造
公开(公告)号：JPS57120308A
公开(公告)日：1982-07-27
申请号：JP546881
申请日：1981-01-17
申请人： Toda Kogyo Corp
发明人： HORIISHI NANAO , YAMAMOTO SHIGEHISA , TAKADA TOSHIO , BANDOU HISANORI
IPC分类号： C01G49/00 , C01G49/06 , C09D5/23 , C09D7/12 , G11B5/706 , H01F1/11
CPC分类号： G11B5/70678
摘要： PURPOSE:To obtain particle powder having uniform structure, large saturation magnetization and less then prescribed coercive force by uniformly mixing raw material composition and melting agent, and controlling the mixing quantity of the agent and baking temperature, thereby enabling the control of the particle state. CONSTITUTION:An oxide becoming oxidized particles as starting material composition or iron oxide particles by heating and a mixture of one or more of carbonate salt or oxide of Ba, Sr or Pb are dispersed in aqueous solution of a melting agent, and are mixed. Then, the mixture is filtered and prepared to contain 0.1-50wt% of the agent to the raw material composition. After the mixture is granulated to 1-15mm. of grain size and is dried, the dried material is heated and baked at a temperature higher than the eutectic temperature of the agent to produce composite ferrite particles containing two or more of ultrafine and uniform hexagonal planar magnet plumbite type Ba, Sr or two or more of Pb ferrite or Ba, Sr, Pb. Thus, particle powder having uniform structure, large saturation magnetization and of coercive force less than prescribed value is obtained.
摘要翻译：目的：通过均匀混合原料组合物和熔融剂，获得具有均匀结构，饱和磁化强度和较小规定矫顽力的颗粒粉末，并控制试剂的混合量和烘烤温度，从而实现颗粒状态的控制。构成：通过加热将作为原料组合物或氧化铁颗粒氧化的氧化物和Ba，Sr或Pb中的一种或多种碳酸盐或氧化物的混合物分散在熔融剂的水溶液中，并混合。然后，将混合物过滤并制备成含有0.1-50wt％的试剂到原料组合物中。混合物造粒至1-15mm。的干燥后，将干燥后的材料在比试剂的共晶温度高的温度下进行加热烧结，得到含有两种以上的超微细且均匀的六方晶系平面磁体铅白石型Ba，Sr或两种以上的复合铁氧体粒子的Pb铁氧体或Ba，Sr，Pb。因此，获得具有均匀结构，饱和磁化强度和矫顽力小于规定值的颗粒粉末。

110. 发明专利

JPS5711830A PREPARATION OF HEAT-RESISTANT YELLOW TYPE PIGMENT FOR RESIN 失效
公开(公告)号：JPS5711830A
公开(公告)日：1982-01-21
申请号：JP8540980
申请日：1980-06-23
申请人： TODA KOGYO CORP
发明人： YAMAMURA KAZUHIRO , TODA KOUJI , HORIISHI NANAO , HITOSHI MASATOSHI
IPC分类号： C08K3/00 , C01G49/00 , C08K3/22 , C08L23/00 , C08L101/00
摘要： PURPOSE:To prepare yellow pigment having improved heat resistance, not causing environmental pollution when it is used for resins, by blending iron oxide with zinc oxide and titanium oxide in a specific ratio, followed by calcining the blend in a specified temperature range. CONSTITUTION:50.0-51.0mol% Iron oxide is blended with 49.0-50.0mol% zinc oxide. For example, Fe2O3, Fe3O4, etc. may be used as the raw material for iron oxide, and zinc carbonate, zinc hydroxide, etc. can be used in stead of zinc oxide. 0.05-2.0wt% Titanium oxide is added to the raw material blend. The blend is calcined in a temperature range from 800-1,100 deg.C to give a compound oxide, which is ground to a specific surface area about 4-6m /g. Consequently, pigment having clear yellow, causing small degree of change in color under heating when a resin is colored with it.

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