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    • 11. 发明授权
    • Silica powder and use thereof
    • 二氧化硅粉及其用途
    • US07820750B2
    • 2010-10-26
    • US12091998
    • 2007-03-19
    • Shuji SasakiNorihisa Nakashima
    • Shuji SasakiNorihisa Nakashima
    • C01B33/12C08K3/34C08K3/36
    • H01L23/295C01B33/18C01P2002/70C01P2004/61C04B14/06C04B20/008C09C1/30H01L2924/0002H01L2924/00
    • The present invention herein provides silica powder which can be incorporated into a sealing material at a high content to thus give a sealing material having excellent moldability. The silica powder at least has, in the volume-based frequency distribution of particle size as determined by the laser diffraction-scattering technique, a maximum frequency value for a mode peak 1present in a particle size range extending from 1 to 4 μm and a maximum frequency value for a mode peak 2 present in a particle size range extending from 15 to 55 μm, wherein the maximum frequency value for the mode peak 2 is greater than that for the mode peak 1, the mode peak 2 has a shoulder, and the content of particles whose particle size ranges from 15 to 55 μm is larger than that of particles whose particle size ranges from 1 to 4 μm.
    • 本发明提供二氧化硅粉末,其可以以高含量掺入密封材料中,从而得到具有优异成型性的密封材料。 二氧化硅粉末在通过激光衍射 - 散射技术确定的基于体积的粒径频率分布中至少具有在1至4μm范围内延伸的粒度范围内的模式峰1的最大频率值和最大值 存在于从15至55μm的粒度范围内的模式峰值2的频率值,其中模式峰值2的最大频率值大于模式峰值1的最大频率值,模式峰值2具有肩部,并且 粒径为15〜55μm的粒子的粒径大于粒径为1〜4μm的粒子的含量。
    • 19. 发明授权
    • Inorganic hollow particle, process for producing the same, and composition containing the same
    • 无机中空颗粒,其制造方法和含有它们的组合物
    • US07816428B2
    • 2010-10-19
    • US12278156
    • 2007-04-24
    • Shuji SasakiYasuhisa NishiShinji YamanoMitsuyoshi Iwasa
    • Shuji SasakiYasuhisa NishiShinji YamanoMitsuyoshi Iwasa
    • C08J9/32
    • C01B33/18C01B13/322C01P2004/32C01P2004/34C01P2006/12C03C11/002H05K1/0373H05K2201/0133H05K2201/0209H05K2201/0254Y10T428/2982
    • The present invention herein provides fine inorganic hollow powder having a high hollowness rate, which can be incorporated into, for instance, a low dielectric rubber or resin composition. The inorganic hollow powder has an average hollowness rate of higher than 70% by volume and an average particle size ranging from 3 to 20 μm and the powder preferably has an average hollowness rate ranging from 75 to 85% by volume, an average particle size ranging from 5 to 15 μm, a maximum particle size of not more than 25 μm, a specific surface area of not more than 10 m2/g, an average sphericity degree of not less than 0.90 and a purity of not less than 99% by mass. The inorganic hollow powder can be prepared by a method comprising the steps of forming a flame using a burner provided with at least a triplet-tubular portion comprising, in order from the outermost side, a combustion-improving gas-supply pipe, a combustible gas-supply pipe and an inorganic raw powder-supply pipe assembled together; injecting, into the flame at a high discharge speed, inorganic raw powder having a specific particle size through the inorganic raw powder-supply pipe, while the powder is entrained with a carrier gas having a specific relative humidity, to thus subject the powder to a heat-treatment.
    • 本发明提供具有高中空率的细小的无机中空粉末,其可以结合到例如低介电橡胶或树脂组合物中。 无机中空粉末的平均中空率高于70体积%,平均粒径为3〜20μm,粉末的平均中空率优选为75〜85体积%,平均粒径为 5〜15μm,最大粒径为25μm以下,比表面积为10m 2 / g以下,平均球形度为0.90以上,纯度为99质量%以上 。 无机中空粉末可以通过以下方法制备:使用设置有至少三重管状部分的燃烧器形成火焰的步骤,其包括从最外侧开始的燃烧改善气体供给管,可燃气体 供应管和无机原料粉供应管组装在一起; 通过无机原料粉供给管以高放电速度向火焰喷射具有特定粒径的无机原料粉末,同时将粉末夹在具有特定相对湿度的载气中,从而将粉末置于 热处理。