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重点研究了粉末冶金法制备Ｉｒ－Ｃｅ（铱－铈）合金阴极过程中压制压力和烧结温度对发射性能的影响，建立起了一套稳定的制备工艺。试验得到Ｉｒ－Ｃｅ掺Ｗ阴极在１７５３Ｋ时的发射电流密度达１２．４Ａ／ｃｍ２，电流密度保持为１．７Ａ／ｃｍ２，发射试验稳定达１５０ｈ。从机理上验证了它是一种高温大发射电流的发射体。试验还表明Ｉｒ－Ｃｅ阴极具有良好的抗中毒能力。作为应用研究，测量了该阴极在热阴极微波电子枪中的发射性能，微波腔场强约１０ＭＶ／ｍ，工作温度１９１３Ｋ，零场发射电流密度为１０Ａ／ｃｍ２，最大发射电流密度达２１Ａ／ｃｍ２，在２０２０Ｋ时计算零场发射电流密度可达４２Ａ／ｃｍ２。
The influence of pressure and sintering temperature on the emission performance during the preparation of Ir-Ce (iridium-cerium) cathode by powder metallurgy was studied emphatically, and a set of stable preparation process was established. Ir-Ce doped W cathode obtained at 1753K when the emission current density of 12.4A / cm2, the current density was maintained at 1.7A / cm2, emission test stable up to 150h. From the mechanism to verify that it is a high temperature and high emission current emitter. Experiments also show that Ir-Ce cathode has good resistance to poisoning. As an applied research, the emission performance of this cathode in hot cathode microwave electron gun was measured. The field strength of microwave cavity was about 10MV / m, the operating temperature was 1913K, the emission current density at zero field was 10A / cm2, the maximum emission current density was 21A / cm2, Calculated at 2020K zero-field emission current density up to 42A / cm2.