METHOD AND APPARATUS FOR MEASURING TRANSFORMATION PRESSURE IN SOLID-LIQUID TRANSFORMATION

PURPOSE:To reduce the measuring time, by placing a temperature detector at the position where it is in direct contact with a sample in a high pressure container to measure the temperature. CONSTITUTION:A sample to be measured is loaded into a sample chamber 5 of a high pressure container 8 and a pressure adjustor 1 is operated with a valve 6 to pressurize or depress a sample through a piston of a boostor 13. The temperature in the sample chamber 5 can be measured directly with a thermometer 17 to detect changes in the physical quantity by checking changes in the volume of the sample with a transformation gauge 14 of the piston. Then, the pressure and the temperature detected is recorded and memorized with a recorder or a computer. Thus, the transformation pressure of material or a mixture transforming from liquid to solid phase or solid to liquid phase can be measured in a short temperature observation time with the pressure as variables.