专利名称：Method of producing an insulating material
for coating cathode heater elements
发明人：Eberhard Weiss申请号：US05/418642申请日：19731123公开号：US03941707A公开日：19760302
摘要：A method of producing an aluminum oxide and tungstate powder for insulatingcathode heaters includes mixing a finely divided aluminum oxide powder with ammoniumtungstate, rinsing out excess ammonium tungstate, drying the mixture and heating in anitrogen-hydrogen atmosphere to about 700°C.
申请人：INTERNATIONAL STANDARD ELECTRIC CORPORATION
代理人：John T. O'Halloran,Menotti J. Lombardi, Jr.
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