Single-sensor rapid scanning calorimeter based on laser heating

Abstract

The invention discloses a single-sensor rapid scanning calorimeter based on laser heating. The calorimeter comprises an FSC sample chamber, a chip sensor positioned in the FSC sample chamber and usedfor bearing a sample, a laser heater used for heating the sample, an infrared camera used for shooting a sample image, a communication terminal and a control electronic element, wherein the center ofthe FSC sample chamber is provided with a perspective window serving as an optical path channel, and the laser heater and the infrared camera are both located at the top of the perspective window; theinfrared camera is connected with the communication terminal; and one end of the control electronic element is connected with the communication terminal, and the other end of the control electronic element is connected with the laser heater and the chip sensor. According to the rapid scanning calorimeter, the laser heater is used for the first time to perform completely controllable rapid heatingon the sample, and the infrared camera is used for assisting in laser aiming, so that heating of areas around the sample is avoided; and compared with traditional sensor internal heating, most directenergy input can be provided, thermal hysteresis between a sensor heater and the sample is avoided, the higher temperature control response rate is achieved, and faster heating and cooling scanning can be achieved.

Description

technical field [0001] The invention belongs to the field of detection equipment, in particular to a laser-heated single-sensor rapid scanning calorimeter. Background technique [0002] Ultrafast Scanning Calorimeter (FSC) uses nano-micron-scale thin-film chip sensors to perform up to 10 micron-scale samples 6 K / s temperature rise and fall scanning calorimetry research, through the built-in heater and thermopile of the sensor film, the sample temperature can be detected and regulated with high sensitivity. However, there is still significant thermal resistance between the sample and the heater. At present, the thermal contact between the sample and the heater is mainly improved by pre-melting the sample or using thermal conductive glue / oil, but it is not suitable for all samples. In addition, the internal heater will also heat the sensors around the sample at the same time, causing energy loss and increasing the additional heat capacity of the system. Using laser heating i...

AI Technical Summary

Problems solved by technology

However, the current combination of laser heating and rapid scanning calorimetry is limited to the use of lasers for auxiliary heating, and the heating is uncontrollable. The main method is to use laser pulses to perform temperature jump experiments on heated samples.

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