Abstract
The authors measured the positron annihilation average lifetime in the sintered mullite-ZrO2 ceramic material at different ratios A/Z and including Cr2O3 and at three temperature values. The experimental results show that the positron lifetime can sensitively reflect the influence of different ratios A/Z and different temperature values on the microscopic structure. According to the theory of microscopic defects and phase-change information supplied by positron lifetimes, some characteristics of the sintering reaction of the mullite-ZrO2 ceramic are explained in this paper. The results were found to be in good agreement with those obtained using other methods.
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