| 摘要 |
<p>PURPOSE:To provide a sorting method for a good zinc oxide element by electrifying the zinc oxide element, measuring the distribution of generated heat of the zinc oxide element at the time of electrifying making it a sorting standard for the zinc oxide element that the ratio of the maximum value to the minimum value of the temperature increase in each part of the zinc oxide element is within a predetermined value. CONSTITUTION:A metallikon electrode 2 is provided in both end surfaces of a zinc oxide element 1, and a black coating is applied to one side, and a radiation thermometer 4 is arranged in the opposite side thereto. The zinc oxide element 1 is electrified from a high voltage power supply part 5, and the temperature distribution of the electrode surface is measured by the radiation thermometer 4 and at the same time the temperature of the element is increased by continuously electrifying it. Thereby, the sorting of the good zinc oxide element 1 is performed by making it a sorting standard whether the ratio of the maximum value to the minimum value of the temperature increase in each part of the zinc oxide element 1 is within a standard value or not. Thereby, a fine sorting method for the good zinc oxide element 1 can be realized.</p> |
