Variable temperature cold stage for microscope observation
Abstract
It is considerably important to measure crystallization velocity in vitreous state for understanding of crystallization mechanism and quantitative analysis of crystallization process. For this measurement, a microscope equipped with a variable temperature cold stage is useful to regulate temperature to be constant for a long period because some crystallization takes a long time around glass transition point. However, since conventional cold stages are cooled by liquid nitrogen gas flow, it is difficult to cool continuously for a long time and to regulate the temperature accurately. This report presents a cold stage cooled by methanol flow which can control the temperature of samples accurately. The device consists of the microscopic stage cooled by cold methanol flow equipped with a thermocouple to regulate the temperature. As a result, this device makes it possible to observe a specimen within the range of 200 to 260 K with deviation of 0.05 K for one month. Therefore, very slow crystallization in low temperature can be measured by this device.
- Publication:
-
In its Bulletin of the Institute for Chemical Reaction Science
- Pub Date:
- September 1992
- Bibcode:
- 1992BICRS...2...39Y
- Keywords:
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- Cooling Systems;
- Low Temperature;
- Optical Microscopes;
- Temperature Control;
- Crystal Growth;
- Methyl Alcohol;
- Instrumentation and Photography