| 摘要 |
A process for calibrating the temperature control unit of a vertical gradient freeze crystal growth oven, instead of the fused material a test body ( 3 ) is used in the oven ( 1 ) that does not melt at the oven temperature, that has a heat conductivity comparable to the fused material and a central bore ( 4 ). After turning on the resistance heaters ( 8, 9, 10 ) of the oven ( 1 ) the temperature at the level of the individual control temperature indicators ( 11, 12, 13 ) of the oven ( 1 ) is measured via a reference temperature indicator ( 5 ) that can be fully inserted into the bore ( 4 ) and subsequently the output of the respective resistance heaters ( 8, 9, 10 ) is set to a desired temperature value. After removing the test body ( 3 ) and the reference temperature indicator ( 5 ), the oven ( 1 ) is operated according to the control temperature indicators ( 11, 12, 13 ) taking into consideration previously determined differences between the reference temperatures and the temperature values of the control temperature indicators ( 11, 12, 13 ).
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