Method for production of ferrite magnetic material
    1.
    发明专利
    Method for production of ferrite magnetic material 审中-公开
    生产铁素体材料的方法

    公开(公告)号:JP2006001752A

    公开(公告)日:2006-01-05

    申请号:JP2004176849

    申请日:2004-06-15

    IPC分类号: C04B35/26 C01G49/00 H01F1/11

    摘要: PROBLEM TO BE SOLVED: To provide a method for production of a W-type ferrite improved in magnetic characteristic, particularly in coercive force. SOLUTION: This method for producing the ferrite magnetic material having a hexagonal W-type ferrite as a main phase comprises a forming process for making a formed body containing a main ingredient and the first accessory ingredient comprising one, two or more selected from the ingredients of Ga, Al, W, Ce, Mo and Cr and a firing process for firing the resultant formed body. The formed body may comprise a calcined body containing both the main and the first accessory ingredients or may comprise a mixture of a calcined body composing the main ingredient with the first accessory ingredient. COPYRIGHT: (C)2006,JPO&NCIPI

    摘要翻译: 解决的问题:提供一种提高磁特性,特别是矫顽力的W型铁氧体的制造方法。 < P>解决方案:用于制造具有六方晶W型铁氧体作为主相的铁氧体磁性材料的方法包括用于制造包含主要成分的成形体的成形方法,第一辅助成分包含选自以下的一种,两种或更多种 Ga,Al,W,Ce,Mo和Cr的成分,以及烧成所得成形体的烧成工序。 成形体可以包含含有主要和第一辅助成分的煅烧体,或者可以包括构成主要成分的煅烧体与第一辅助成分的混合物。 版权所有(C)2006,JPO&NCIPI

    Method for manufacturing oxide sintered compact, and composition
    2.
    发明专利
    Method for manufacturing oxide sintered compact, and composition 审中-公开
    制造氧化物烧结的方法和组合物

    公开(公告)号:JP2005336025A

    公开(公告)日:2005-12-08

    申请号:JP2004159500

    申请日:2004-05-28

    摘要: PROBLEM TO BE SOLVED: To provide a technique for improving a sintering density with gaining an effect of carbon addition. SOLUTION: The method for manufacturing an oxide sintered compact comprises a forming process of forming a mixture containing a raw material powder, a carbon powder and a polycarboxylic acid-based dispersant and a sintering process of sintering a formed body obtained and of giving a sintered compact. The polycarboxylic acid-based dispersant suppresses the segregation of the carbon powder, so that the increase in pinholes and the decrease in the sintering density caused thereby may be suppressed even if the carbon powder vanishes at the time of sintering. Consequently, the segregation of the carbon powder can be suppressed and a high density, oxide sintered compact can be obtained with gaining an effect of the carbon addition. Being applied to a W-type ferrite magnet, the W-type ferrite magnet with a high remanent magnetic flux density (Br) can be obtained. COPYRIGHT: (C)2006,JPO&NCIPI

    摘要翻译: 要解决的问题:提供一种提高烧结密度的技术,获得碳添加效果。 解决方案:氧化物烧结体的制造方法包括形成含有原料粉末,碳粉末和多元羧酸系分散剂的混合物的成形工序,烧结成形体的烧结工序, 烧结体。 多元羧酸类分散剂抑制碳粉的偏析,即使碳粉在烧结时消失,也可以抑制由此引起的针孔的增加和烧结密度的降低。 因此,可以抑制碳粉末的偏析,并且可以获得碳添加效果的高密度氧化物烧结体。 应用于W型铁氧体磁体时,可以获得具有高残留磁通密度(Br)的W型铁氧体磁体。 版权所有(C)2006,JPO&NCIPI

    Manufacturing methods of sintered magnet and ferrite magnetic material
    4.
    发明专利
    Manufacturing methods of sintered magnet and ferrite magnetic material 审中-公开
    烧结磁铁和铁磁材料的制造方法

    公开(公告)号:JP2005286172A

    公开(公告)日:2005-10-13

    申请号:JP2004099446

    申请日:2004-03-30

    IPC分类号: C04B35/26 H01F1/11 H01F41/02

    摘要: PROBLEM TO BE SOLVED: To improve magnetic characteristics of a W-type ferrite, especially its coercive force. SOLUTION: The manufacturing method of a ferrite magnetic material has a process (a) for calcining the mixture wherein the Ca component of not smaller than 0.01 wt.%, and smaller than 1.0 wt.% obtained when calculating it in terms of CaCO 3 is added to the raw-material powder containing an A component (where A represents one or more kinds of elements selected from Sr, Ba, and Pb) and an Fe component; a process (b) for crushing the calcined material obtained in the process (a); a process (c) for molding in a magnetic field the crushed powder obtained in the process (b); and a process (d) for so baking the molded body obtained in the process (c) as to obtain the sintered body whose magnetic phase is a hexagonal crystal W-type ferrite. Since the crystal grains of the sintered body are made fine by adding the Ca component of the predetermined quantity to the raw-material powder when blending the raw-material powder, the coercive force (HcJ) of the ferrite magnetic material which exceeds 30,000e can be obtained. COPYRIGHT: (C)2006,JPO&NCIPI

    摘要翻译: 要解决的问题:为了改善W型铁氧体的磁特性,特别是其矫顽力。 铁氧体磁性材料的制造方法具有煅烧混合物的方法(a),其中当Ca成分计算为0.01重量%以上且小于1.0重量%时, 向含有A成分(其中A表示选自Sr,Ba和Pb中的一种或多种元素)和Fe成分的原料粉末中加入CaCO 3 SBS 3 用于破碎方法(a)中获得的煅烧材料的方法(b); 用于在磁场中模制在方法(b)中获得的粉碎粉末的方法(c); 以及(c)工序中得到的成型体的烧成体(d),得到磁性相为六方晶W型铁氧体的烧结体。 由于通过在混合原料粉末时向原料粉末中添加规定量的Ca成分使烧结体的晶粒细化,所以铁素体磁性材料的矫顽力(HcJ)超过30,000e可以 得到。 版权所有(C)2006,JPO&NCIPI

    W type ferrite sintered compact and its production process
    5.
    发明专利
    W type ferrite sintered compact and its production process 审中-公开
    W型铁素体烧结及其生产工艺

    公开(公告)号:JP2005281129A

    公开(公告)日:2005-10-13

    申请号:JP2005057269

    申请日:2005-03-02

    IPC分类号: C04B35/26 H01F1/11

    摘要: PROBLEM TO BE SOLVED: To provide a W type ferrite sintered compact which has high existence ratio of a W phase in the entire area of the sintered compact and to provide its production process. SOLUTION: The W type ferrite sintered compact having ≥65% existence ratio of the W phase within the sintered compact and ≤20%/mm change rate of the existence ratio of the W phase is obtained by making a raw material composition containing ≥0.05 to COPYRIGHT: (C)2006,JPO&NCIPI

    摘要翻译: 要解决的问题:提供在烧结体的整个区域中W相的存在比率高的W型铁氧体烧结体并提供其制造方法。 &lt; P&gt;解决方案:通过将含有W相的W相的W相的W相的存在比率≥65%的W相和W相的存在比的≤20%/ mm变化率的W型铁氧体烧结体 ≥0.05〜<0.7重量%的碳,将原料成分在磁场中成型为生坯,对生坯进行热处理,将生坯保持在200〜400℃的温度范围(不包含 为200℃),然后对经受热处理的生坯进行焙烧。 版权所有(C)2006,JPO&NCIPI

    Manufacturing method of w-type ferrite sintered compact and w-type ferrite sintered compact
    7.
    发明专利
    Manufacturing method of w-type ferrite sintered compact and w-type ferrite sintered compact 审中-公开
    W型铁素体烧结制品和W型铁素体烧结制造方法

    公开(公告)号:JP2006062908A

    公开(公告)日:2006-03-09

    申请号:JP2004247038

    申请日:2004-08-26

    IPC分类号: C04B35/26 H01F1/10 H01F41/02

    摘要: PROBLEM TO BE SOLVED: To provide a method of obtaining a W-type ferrite sintered compact high in the existing ratio of W phase in the whole range of the sintered compact. SOLUTION: This manufacturing method comprises a molding process in a magnetic field in which a feed composition containing a specified quantity of a reducing agent is molded to form a molding, and a firing process in which the molding is fired by raising the temperature of the molding in the reducing temperature range of the reducing agent at a speed of not greater than 4°C/min (excluding 0). It is preferable that the firing is carried out after a heat treatment in which the molding is kept at a temperature of 200-400°C in an oxidizing atmosphere. The sintered compact obtained by the method is rich in W phase in the sintered compact with its existing ratio of not lower than 90%. COPYRIGHT: (C)2006,JPO&NCIPI

    摘要翻译: 要解决的问题:提供一种在烧结体的整个范围内获得W相的W相的现有比例高的W型铁氧体烧结体的方法。 解决方案:该制造方法包括在磁场中的成型工艺,其中含有指定量的还原剂的进料组合物被模制以形成模制件,以及焙烧工艺,其中通过提高温度 在不低于4℃/ min(不包括0)的速度下在还原剂的还原温度范围内进行成型。 优选在氧化气氛中在200-400℃的温度下进行热处理之后进行烧成。 通过该方法获得的烧结体在烧结体中的W相富含,其比例不低于90%。 版权所有(C)2006,JPO&NCIPI

    Method for manufacturing oxide sintered compact, and composition
    8.
    发明专利
    Method for manufacturing oxide sintered compact, and composition 审中-公开
    制造氧化物烧结的方法和组合物

    公开(公告)号:JP2005336037A

    公开(公告)日:2005-12-08

    申请号:JP2004160839

    申请日:2004-05-31

    摘要: PROBLEM TO BE SOLVED: To provide a technique for improving a sintering density with gaining an effect of carbon addition. SOLUTION: The method for manufacturing an oxide sintered compact comprises a forming process of forming a mixture containing a raw material powder, a carbon powder and a polyoxyethylene-based dispersant and a sintering process of sintering a formed body obtained and of giving a sintered compact. The polyoxyethylene-based dispersant suppresses the segregation of the carbon powder, so that the increase in pinholes and the decrease in the sintering density caused thereby may be suppressed even if the carbon powder vanishes at the time of sintering. Consequently, the segregation of the carbon powder can be suppressed and a high density, oxide sintered compact can be obtained with gaining an effect of the carbon addition. Being applied to a W-type ferrite magnet, the W-type ferrite magnet with a high remanent magnetic flux density (Br) can be obtained. COPYRIGHT: (C)2006,JPO&NCIPI

    摘要翻译: 要解决的问题:提供一种提高烧结密度的技术,获得碳添加效果。 解决方案:氧化物烧结体的制造方法包括形成含有原料粉末,碳粉末和聚氧乙烯基分散剂的混合物的成形方法,以及烧结成型体的烧结工序, 烧结体。 聚氧乙烯基分散剂抑制碳粉末的偏析,从而即使碳粉末在烧结时消失,也可以抑制针孔的增加和由此引起的烧结密度的降低。 因此,可以抑制碳粉末的偏析,并且可以获得碳添加效果的高密度氧化物烧结体。 应用于W型铁氧体磁体时,可以获得具有高残留磁通密度(Br)的W型铁氧体磁体。 版权所有(C)2006,JPO&NCIPI

    Method for manufacturing sintered oxide compact and composition
    9.
    发明专利
    Method for manufacturing sintered oxide compact and composition 审中-公开
    制造烧结氧化物的方法和组合物

    公开(公告)号:JP2005179175A

    公开(公告)日:2005-07-07

    申请号:JP2004159501

    申请日:2004-05-28

    IPC分类号: C04B35/26 H01F1/11

    摘要: PROBLEM TO BE SOLVED: To provide a technique for improving sintering density while fully receiving the effect of carbon addition. SOLUTION: The method is provided with: a molding process of molding a mixture containing raw material powder, carbon powder and a polyhydric alcohol expressed by the general formula: C x (OH) y H z (wherein 4≤x≤100, 2≤y≤x, 4≤z≤2x); and a sintering process of obtaining a sintered compact by sintering the resulting molding. The polyhydric alcohol suppresses the segregation of the carbon powder and therefore, even if the carbon powder disappears during the sintering, an increase of pinholes and the decrease in the sintering density due to the same can be suppressed. According to the method, the segregation of the carbon powder can be suppressed and the sintered oxide compact of high density can be obtained while the effect by the carbon addition is fully received. A W type ferrite magnet of a high residual magnetic flux density (Br) can be obtained by applying the method to the W type ferrite magnet. COPYRIGHT: (C)2005,JPO&NCIPI

    摘要翻译: 要解决的问题:提供一种完全获得碳添加效果的提高烧结密度的技术。 解决方案:该方法具有:将由以下通式表示的原料粉末,碳粉末和多元醇的混合物成型的成型工艺:C (OH) (其中4≤x≤100,2≤y≤x,4≤z≤2x); 以及通过烧结所得成型体获得烧结体的烧结工艺。 多元醇抑制碳粉末的偏析,因此即使烧结时碳粉末消失,也能够抑制针孔的增加和烧结密度的降低。 根据该方法,可以抑制碳粉的分离,并且可以在充分获得碳添加效果的同时获得高密度氧化烧结体。 通过将该方法应用于W型铁氧体磁体,可以获得高残留磁通密度(Br)的W型铁氧体磁体。 版权所有(C)2005,JPO&NCIPI

    Manufacturing method of oxide sintered compact and composition
    10.
    发明专利
    Manufacturing method of oxide sintered compact and composition 审中-公开
    氧化物烧结成型及组成的制造方法

    公开(公告)号:JP2005162498A

    公开(公告)日:2005-06-23

    申请号:JP2003399379

    申请日:2003-11-28

    IPC分类号: C04B35/26 C04B35/622 H01F1/11

    摘要: PROBLEM TO BE SOLVED: To provide a technology for improving sintered density while benefiting from carbon addition. SOLUTION: The manufacturing method of an oxide sintered compact comprises a molding step wherein a mixture containing a raw material powder, a carbon powder and a dispersant is molded and a sintering step wherein the obtained molded product is sintered to obtain the sintered compact. The dispersant used here is an organic compound having a hydroxy or carboxy group, its neutralized salt or its lactone, an organic compound having a hydroxymethylcarbonyl group or an organic compound having an enolic hydroxy group which can dissociate as an acid or its neutralized salt, wherein the organic compound has 3-20 carbons and has hydroxy groups bound to ≥50% of carbon atoms that are not forming double bonds with oxygen atoms. The dispersant (e.g. gluconic acid) inhibits segregation of the carbon powder and therefore inhibits increase in pinholes and the resulting decrease in sintered density, even when the carbon powder disappears at sintering. COPYRIGHT: (C)2005,JPO&NCIPI

    摘要翻译: 要解决的问题:提供一种提高烧结密度同时受益于碳添加的技术。 解决方案:氧化物烧结体的制造方法包括成型步骤,其中将含有原料粉末,碳粉末和分散剂的混合物成型,并且烧结步骤,其中将所得成型体烧结以获得烧结体 。 这里使用的分散剂是具有羟基或羧基的有机化合物,其中和的盐或其内酯,具有羟甲基羰基的有机化合物或具有可以作为酸或其中和盐分解的烯醇羟基的有机化合物,其中 有机化合物具有3-20个碳原子并具有与氧原子不形成双键的碳原子的≥50%的羟基。 分散剂(例如葡萄糖酸)抑制碳粉末的分离,因此即使碳粉末在烧结时消失,也抑制针孔的增加和烧结密度的降低。 版权所有(C)2005,JPO&NCIPI