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    • 7. 发明授权
    • Alumina substrate and method of manufacturing same
    • 氧化铝基板及其制造方法
    • US4045412A
    • 1977-08-30
    • US595703
    • 1975-07-14
    • Seiichi YamadaKyohei Murakawa
    • Seiichi YamadaKyohei Murakawa
    • B28B1/30C04B35/111H05K1/03C04B35/64C04B35/10
    • C04B35/111H05K1/0306
    • An improved alumina substrate comprising alumina and magnesium oxide has a surface finish of no more than 0.05 .mu.m CLA and a density of at least 3.90 g/cm.sup.3 in an as-fired condition and is composed of alumina grains which are sufficiently grown to have straight grain boundaries and flat surfaces to form a surface of the substrate. The improved substrate is produced by firing a green sheet having a high content of raw material powder and a density of more than 2.60 g/cm.sup.3 at a temperature of 1525.degree. to 1650.degree. C. The green sheet with high density is formed by the process of aggregating an organic agent and a high purity alumina powder by dry milling and casting the resultant slip.
    • 包含氧化铝和氧化镁的改进的氧化铝基材在烧制条件下具有不超过0.05μm的CLA的表面光洁度和至少3.90g / cm 3的密度,并且由氧化铝颗粒组成,其被充分生长以具有直 晶界和平坦表面以形成基底的表面。 通过在1525℃〜1650℃的温度下焙烧原料粉末含量高,密度大于2.60g / cm 3的生片,制造改良的基材。通过该方法形成高密度的生片 通过干磨和铸造所得到的滑移来聚集有机试剂和高纯度氧化铝粉末。