1461495 Cathode heaters INTERNATIONAL STANDARD ELECTRIC CORP 5 April 1974 [6 April 1973] 15259/74 Heading H1D [Also in Division H5] A heater for an indirectly heated cathode has a dark porous coating of a sintered mixture of Al 2 O 3 and W. The layer is formed by coating a filament with an Al 2 O 3 layer by electrophoretic deposition, dipping in aqueous NH 4 tungstate, rinsing in methanol and sintering in a N 3 , H 2 atmosphere. The cathode is used in a C.R.T.
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机译：1461495阴极加热器国际标准电气公司1974年4月5日[1973年4月6日] 15259/74标题H1D [也属于H5部门]用于间接加热阴极的加热器具有深色的多孔涂层，该涂层具有Al 2 O 3和W的烧结混合物。该层通过以下方式形成：通过电泳沉积在细丝上涂覆Al 2 O 3层，浸入NH 4钨酸水溶液中，在甲醇中漂洗并在N 3，H 2气氛中烧结。阴极用于C.R.T.
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