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1. 发明专利

JPS59213626A Pretreatment of acicular iron oxide powder 失效
标题翻译：预处理氧化铁粉
公开(公告)号：JPS59213626A
公开(公告)日：1984-12-03
申请号：JP8498283
申请日：1983-05-17
申请人： Ube Ind Ltd
发明人： OODAN KIYOUJI , MIURA HIROSHI , ISHICHI KOUJI
IPC分类号： G11B5/62 , B22F9/22 , C01G49/02 , C09D5/23 , C09D7/12 , H01F1/06 , H01F1/11
摘要： PURPOSE: To prevent deformation of shape and sintering of particles and to obtain superior magnetic characteristics of magnetic powder by allowing acicular iron oxide powder to contact with gaseous Si compd. before its heat treatment.
CONSTITUTION: Acicular iron oxide powder such as FeO, α-Fe
2 O
3 , γ-Fe
2 O
3 , Fe
3 O
4 , etc. is allowed to contact with gaseous Si compd. such as silicic acid ester, silicon halide, etc., and Si compd. is deposited or adsorbed uniformly to the surface of the iron oxide particles. The acicular iron oxide powder pretreated in this way is heat-treated. By this method, deformation of the acicular shape or sintering of particles is prevented and magnetic powder having superior magnetic characteristics is obtd.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：通过使针状氧化铁粉末与气态Si化合物接触，防止形状变形和颗粒烧结，获得优异的磁粉特性。在其热处理之前。构成：使FeO，α-Fe2O3，γ-Fe2O3，Fe3O4等针状氧化铁粉末与气态Si化合物接触。例如硅酸酯，卤化硅等，以及Si化合物。沉积或吸附到氧化铁颗粒的表面。以这种方式预处理的针状氧化铁粉末进行热处理。通过该方法，可以防止针状或针状烧结，可以获得具有优异磁特性的磁性粉末。

2. 发明专利

JPS59207843A Production of magnetic powder 失效
标题翻译：生产磁粉
公开(公告)号：JPS59207843A
公开(公告)日：1984-11-26
申请号：JP8016383
申请日：1983-05-10
申请人： Ube Ind Ltd
发明人： OODAN KIYOUJI , MIURA HIROSHI , ISHICHI KOUJI
IPC分类号： B22F9/22 , C01G49/02 , G11B5/62 , H01F1/06 , H01F1/11
摘要： PURPOSE: To obtain magnetic powder, effectively preventing the collapse and sintering the particles caused by the heat-treatment, by contacting acicular iron oxyhydroxide powder with vapor of a silicon compound prior to the heat-treatment.
CONSTITUTION: In the preparation of acicular magnetic powder by the heat- treatment of acicular iron oxyhydroxide, the iron oxyhydroxide powder is brought into contact with the vapor of a silicon compound prior to the heat- treatment. The acicular iron oxyhydroxide is e.g. the powder of α-FeOOH, β- FeOOH, γ-FeOOH, etc., above all α-FeOOH because any kinds of magnetic powder such as magnetite, maghemite, metallic iron, etc. can be produced therefrom. The silicon compound is preferably an easily hydrolyzable compound capable of giving SiO
2 easily by the above contacting process.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：为了获得磁粉，有效防止热处理引起的颗粒塌陷和烧结，在热处理前，将针状羟基氧化铁粉与硅化合物的蒸气接触。构成：通过热处理针状羟基氧化铁制备针状磁粉，在热处理前，使羟基氧化铁粉与硅化合物的蒸气接触。针状羟基氧化铁是例如。高于所有α-FeOOH的α-FeOOH，β-FeOOH，γ-FeOOH等的粉末，因为可以由其制备任何种类的磁粉，如磁铁矿，磁赤铁矿，金属铁等。硅化合物优选是能够通过上述接触方法容易地提供SiO 2的容易水解的化合物。

3. 发明专利

JPS59198702A Manufacture of magnetic powder 失效
标题翻译：磁粉制造
公开(公告)号：JPS59198702A
公开(公告)日：1984-11-10
申请号：JP7206183
申请日：1983-04-26
申请人： Ube Ind Ltd
发明人： OODAN KIYOUJI , MIURA HIROSHI , ISHICHI KOUJI
IPC分类号： G11B5/712 , B22F1/00 , B22F9/22 , C01G49/02 , C09D5/23 , C09D7/12 , G11B5/706 , H01F1/032
CPC分类号： G11B5/70689
摘要： PURPOSE:To check effectively getting out of shape of parent material powder and sintering between particles according to heat treatment, and to obtain uniformly needle-like magnetic powder having favorable dispersibility by a method wherein phosphate in gaseous condition is made to come in contact with the parent material powder. CONSTITUTION:When needle-like magnetic powder is to be manufactured using needle-like oxy iron hydroxide powder or needle-like iron oxide powder as a parent material, the parent material is made to come in contact previously with phosphate in gaseous condition, and needle-like oxy iron hydroxide (goethite) powder is filled up in a quartz tube provided with a glass filter at the bottom. Then air is circulated at the room temperature in trimethyl phosphate, air containing 1vol% of trimethyl phosphate is flowed in the quartz tube using air as a carrier, and the trimethyl phosphate is made to come in contact with the goethite powder at the room temperature for 10min fluidizing the goethite powder. Then after the powder thereof is heated to be dehydrated for 1hr at 600 deg.C in an air atmosphere, it is reduced in a hydrogen atmosphere for 1hr at 320 deg.C, and then oxidized for 1hr at 250 deg.C in an air atmosphere to obtain needle-like magnetic powder of magnesite.
摘要翻译：目的：为了有效地检查母材粉末的形状和根据热处理的颗粒之间的烧结，并且通过使气态磷酸盐与其接触的方法获得均匀的具有良好分散性的针状磁性粉末母料粉。构成：使用针状氧化铁氢氧化物粉末或针状氧化铁粉末作为母体制造针状磁性粉末时，使母体与气态条件下的磷酸盐接触，并且针将氧化氢氧化铁（针铁矿）粉末填充在底部设有玻璃过滤器的石英管中。然后将空气在室温下在磷酸三甲酯中循环，使用空气作为载体，将含有1体积％磷酸三甲酯的空气在石英管中流动，并使磷酸三甲酯与室温下与针铁矿粉接触 10min流出针铁矿粉。然后将其粉末在空气气氛中在600℃加热脱水1小时后，在氢气气氛中在320℃下还原1小时，然后在空气中在250℃下氧化1小时气氛中获得菱镁矿针状磁粉。

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