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Y 2 O 3 –Mo cermet cathodes were prepared by mechanical mixing of Y 2 O 3 and Mo powder. The prepared cermet cathode provides a certain secondary emission yield (3.09), about 1.8 times lower than that for the cathode prepared by sol–gel method. It was found that the cathode prepared by sol–gel method had a smaller grain size, which could be attributed to its higher...
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