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| Study on the influence of aluminates structure on cathode characteristics |
| Wang Xiaoxia; Liao Xianheng; Luo Jirun; Zhao Qinglan |
| Institute of Electronics Chinese Academy of Sciences Beijing 100080 China |
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Abstract The structure of aluminates which are used for Ba-W cathode is analyzed by XRD technology. It has been shown that the aluminates produced by some companies in Russian and our country are very complicated. The main single structure (Ba5CaAl4O12) of the aluminates has been formed by a new firing technology and new prescription. Its firing temperature; is 200°C lower than that of conventional method. The melting point of the aluminates is lower than that of the conventional one. The cathode impregnated with the new aluminateH has high and stable emission current and low evaporation, which can improve the characteristics of Ba-W cathode.
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Received: 28 March 2002
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2003, Vol. 25 
