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  • [发明专利]JP19770093033 _ GEN ELECTRIC 1977年08月04日
    A particulate mixture of beta -silicon carbide, boron carbide and a carbonaceous additive is formed into a green body and sintered producing a sintered body with a density of at least about 85% containing boron carbide in an amount ranging from about...
  • [发明专利]JP19770016157 _ ISHIKAWAJIMA HARIMA HEAVY IND 1977年02月18日
    PURPOSE:To prepare a solidified slag with superior strength and toughness properties and at the same time recover holding heat capacity of the molten slag efficiently, by supplying the molten slag onto a rotary drum, supplying a refrigerant into the d...
  • [发明专利]JP19770055025 _ MITSUBISHI CHEM IND 1977年05月13日
  • 4.
    [发明专利]JP19770043788 _ MATSUSHITA ELECTRIC WORKS LTD 1977年04月15日
  • [发明专利]GB19770036397 _ BISCH A 1977年08月31日
  • 6.
    [发明专利]JP19770112218 _ 1977年09月20日
  • [发明专利]GB19770053612 _ GEC US 1977年12月22日
  • [发明专利]FR19770022564 _ THOMSON CSF 1977年07月22日
    Converting a dielectric material into a conductive or semiconductive material and vice versa, includes a step of treating the material at a temp. below T degree C (the known transition temp. for the material usually >500 degrees C), during which the m...
  • 9.
    [发明专利]DE19772726157 _ ROHRBACH TECHNOLOGIE KG BAUSTOFFTECHNIK GMBH & CO, 7460 BALINGEN, DE 1977年06月10日
  • [发明专利]US19770828193 _ TDK ELECTRONICS CO LTD 1977年08月26日
    A piezoelectric ceramic composition which comprises the combination of a pyrochlore composite oxide Ba2Sb2O7, and a base ceramic mixture of PbTiO3 and PbZrO3.
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