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    • 1. 发明专利
    • Porous body, and its production method
    • 多孔体及其生产方法
    • JP2008230904A
    • 2008-10-02
    • JP2007072928
    • 2007-03-20
    • Miyagi PrefectureNihon Ceratec Co Ltd宮城県株式会社日本セラテック
    • SAITO MASAHIROABE KAZUHIKOOYAMA REIWADA CHIHARUOTAKI HIROMICHIICHIKAWA YOSHITAKAMIURA TOMOYUKI
    • C04B38/00B01D39/00B01D39/20
    • PROBLEM TO BE SOLVED: To provide a porous body composed of a binderless sintered compact in which high purity ceramics particles are bound without adding a sintering auxiliary, thus as maintaining high purity as a porous body, and porosity and pore size are simultaneously controlled, and to provide its production method. SOLUTION: The porous body is composed of a bound body of ceramic particles with a purity of ≥99.5%, and comprises no sintering auxiliary components as a binder, thus has high purity. The average particle diameter of the ceramics particles composing the bound body is 10 to 50 μm, and also, the ratio of the remaining particles other than the particles with the particle diameter 0.5 times the average particle diameter or below and the particles with the particle diameter 2.5 times the average particle diameter or above is ≥95 wt.%. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种由无粘结剂烧结体构成的多孔体,其中不添加烧结助剂而结合高纯度陶瓷颗粒,因此保持作为多孔体的高纯度,同时孔隙率和孔径 控制,并提供其生产方法。 解决方案:多孔体由纯度≥99.5%的陶瓷颗粒结合体组成,不含烧结辅助成分作为粘合剂,因此纯度高。 构成结合体的陶瓷粒子的平均粒径为10〜50μm,粒径为平均粒径的0.5倍以下的残留粒子与粒径的比例 平均粒径的2.5倍以上≥95重量%。 版权所有(C)2009,JPO&INPIT
    • 2. 发明专利
    • Method for producing porous body
    • 生产多孔体的方法
    • JP2012106929A
    • 2012-06-07
    • JP2012021808
    • 2012-02-03
    • Miyagi PrefectureNihon Ceratec Co Ltd宮城県株式会社日本セラテック
    • SAITO MASAHIROABE KAZUHIKOOYAMA REIWADA CHIHARUOTAKI HIROMICHIICHIKAWA YOSHITAKAMIURA TOMOYUKI
    • C04B38/00C04B35/64C04B35/645
    • PROBLEM TO BE SOLVED: To provide a method for producing a porous body in which high purity ceramic particles are bonded without being added with a sintering aid to keep high purity as a porous body and which is made of a binderless-made sintered body which controls porosity and a pore diameter simultaneously.SOLUTION: The method includes a step in which the ceramic particles which have a purity of at least 99.5% and an average particle size of 10-50 μm and contain at least 95 wt.% of rest ceramic particles excluding particles whose particle diameters do not exceed 0.5 time the average particles size and particles whose particle diameters are at least 2.5 times the average particle size are set up as raw material powder 14 and a step for sintering the raw material powder by a pressurized elecrifying sintering method or a pressurized sintering method. In a vacuum or an inert gas atmosphere, applied pressure 12 when pressurized is 10-60 MPa, temperature is raised to a prescribed sintering temperature of at least 1,200°C at a temperature rising speed of 30-45°C/min, and retention time after the stop of the displacement of the porous body in a sintering mold 10 is within 2 h.
    • 要解决的问题:提供一种制造多孔体的方法,其中高纯度陶瓷颗粒不添加烧结助剂以保持高纯度作为多孔体,并且由无粘结剂制成的烧结体 同时控制孔隙度和孔径的体。 解决方案:该方法包括以下步骤:其中纯度至少为99.5%,平均粒径为10-50μm并且含有至少95重量%的除颗粒外的其余陶瓷颗粒的陶​​瓷颗粒 直径不超过0.5倍,粒径为平均粒径的2.5倍以上的平均粒径和粒子为原料粉末14,通过加压电解烧结法或加压烧结法烧成原料粉末的工序 烧结法。 在真空或惰性气体气氛中,加压时的施加压力12为10〜60MPa,温度以30〜45℃/分钟的升温速度升温至1200℃以上的规定烧结温度, 多孔体在烧结模具10中的位移停止后的时间在2小时以内。 版权所有(C)2012,JPO&INPIT
    • 3. 发明专利
    • Alumina ceramics, and method for producing the same
    • 铝氧化物陶瓷及其制造方法
    • JP2013010668A
    • 2013-01-17
    • JP2011144663
    • 2011-06-29
    • Taiheiyo Cement Corp太平洋セメント株式会社Nihon Ceratec Co Ltd株式会社日本セラテック
    • SAITO NORIKOISHIDA HIRONORINAKAMURA HIROAKIOGURA TOMOYUKIMIURA TOMOYUKI
    • C04B35/10
    • PROBLEM TO BE SOLVED: To provide alumina ceramics having high processing efficiency, while having high purity, and generating few breaks or chippings during processing, and to provide a method for producing the same.SOLUTION: The alumina ceramics having alumina purity of ≥99.5 wt.% contain ≥60% anisotropic crystal particles 10 of alumina having a major axis length of ≥10 μm and an aspect ratio of ≥2. Since the larger particle size of alumina particles has lower resistance of a grain boundary, processing efficiency becomes high because the major axis length of the alumina particles is ≥10 μm. Since the aspect ratio of alumina particles is ≥2, when being hit by a grindstone in some fixed direction G, a tendency of being easily broken appears remarkably. Resultantly, the alumina ceramics can be obtained, having high processing efficiency, while having high purity, and generating few breaks or chippings during processing.
    • 要解决的问题:提供具有高加工效率的氧化铝陶瓷,同时具有高纯度,并且在加工期间产生少量断裂或碎屑,并提供其制造方法。 解决方案:氧化铝纯度≥99.5重量%的氧化铝陶瓷含有≥60%的长轴长度≥10μm,长径比≥2的氧化铝的各向异性晶体颗粒10。 由于氧化铝颗粒的较大粒径具有较低的晶界电阻,因为氧化铝颗粒的长轴长度≥10μm,处理效率变高。 由于氧化铝颗粒的纵横比≥2,当在一些固定方向G上被磨石撞击时,容易破裂的倾向显着。 因此,可以获得具有高加工效率的氧化铝陶瓷,同时具有高纯度,并且在加工过程中产生很少的断裂或碎屑。 版权所有(C)2013,JPO&INPIT
    • 7. 发明专利
    • Aluminum oxide sintered body, and method for producing the same
    • 氧化铝烧结体及其制造方法
    • JP2013056793A
    • 2013-03-28
    • JP2011195349
    • 2011-09-07
    • Taiheiyo Cement Corp太平洋セメント株式会社Nihon Ceratec Co Ltd株式会社日本セラテック
    • SAITO NORIKOOGURA TOMOYUKINAKAMURA HIROAKIMIURA TOMOYUKI
    • C04B35/10H01B3/10H01L21/205H01L21/3065H01L21/31
    • PROBLEM TO BE SOLVED: To provide an aluminum oxide sintered body producible comparatively inexpensively, having a low dielectric loss tangent, and excellent in processability, and to provide a method for producing the same.SOLUTION: In this aluminum oxide sintered body in which the purity of aluminum oxide is ≥99.0 wt.%, titanium oxide and silicon dioxide are contained in as much as ≥0.2 wt.% to ≤0.8 wt.% in total, and the average particle size in the lengthy direction of aluminum oxide particles is ≥20 μm. Thus, since titanium oxide is contained, aluminum oxide particles are coarsened, and the grain boundary between each aluminum oxide particle is reduced, thus lowering the dielectric loss tangent. On the other hand, since silicon oxide is contained, the dielectric loss tangent can be lowered stably. Further, since the particles are coarsened, processability can be improved. Furthermore, cost can be reduced, because an extremely high purity of aluminum oxide is unnecessary.
    • 要解决的问题:提供一种相对廉价生产的具有低介电损耗角正切和加工性优异的氧化铝烧结体,并提供其制造方法。 解决方案:在氧化铝纯度≥99.0重量%的氧化铝烧结体中,氧化钛和二氧化硅的含量总计高达≥0.2重量%至≤0.8重量% 氧化铝粒子的长度方向的平均粒径≥20μm。 因此,由于含有氧化钛,所以氧化铝粒子变粗,每个氧化铝粒子之间的晶界减小,因此介电损耗角正切。 另一方面,由于含有氧化硅,因此可以稳定地降低介电损耗角正切。 此外,由于粒子变粗,可以提高加工性。 此外,由于不需要极高纯度的氧化铝,所以可以降低成本。 版权所有(C)2013,JPO&INPIT
    • 10. 发明专利
    • Ceramic molding, sintered body and method for producing the both
    • 陶瓷成型,烧结体以及生产二者的方法
    • JP2013010329A
    • 2013-01-17
    • JP2011145947
    • 2011-06-30
    • Taiheiyo Cement Corp太平洋セメント株式会社Nihon Ceratec Co Ltd株式会社日本セラテック
    • NAKAMURA HIROAKIOGURA TOMOYUKISAITO NORIKOMIURA TOMOYUKI
    • B28B11/00B28B1/26B28B11/08
    • PROBLEM TO BE SOLVED: To provide a method or the like by which deterioration possibility of a ceramic molding caused by moisture absorption can be reduced and improvement in processing accuracy and reduction in a processing cost of a ceramic sintered body can be attained thereby.SOLUTION: In the ceramic molding, strength and hardness can be controlled within a range suitable for high precision processing by controlling binder content and moisture content. Thereby a swept state of powder produced on the molding when processed becomes better and occurrence of a crack or the like can be avoided to achieve good surface properties by processing. Further load applied to a machining tool can be reduced. Thus the sintered body produced by sintering the molding has good surface properties without surface processing. Consequently a finishing cost can be reduced.
    • 要解决的问题:为了提供可以降低由吸湿引起的陶瓷成型体的劣化可能性的方法等,从而可以获得加工精度的提高和陶瓷烧结体的加工成本的降低 。

      解决方案:在陶瓷成型中,通过控制粘合剂含量和含水量,可以将强度和硬度控制在适合于高精度加工的范围内。 因此,在加工时在模制品中产生的粉末的扫掠状态变得更好,并且可以避免产生裂纹等,以通过加工获得良好的表面性质。 可以减少施加在加工工具上的负荷。 因此,通过烧结成型制造的烧结体在没有表面处理的情况下具有良好的表面性能。 因此可以减少整理成本。 版权所有(C)2013,JPO&INPIT