Differential scanning calorimeter and manufacturing method thereof

Abstract

The invention provides a differential scanning calorimeter and a manufacturing method thereof. The differential scanning calorimeter comprises a main body core part formed by using a thick-film technology and a heat insulating layer arranged on the outer side of the main body core part, wherein the main body core part comprises a conducting layer, a first insulating layer, a sensor layer and a second insulating layer which are sequentially arranged on one side of the conducting layer, and a third insulating layer, a heating layer and a fourth insulating layer which are arranged on the other side of the conducting layer; the sensor layer comprises a sample-side sensor and a reference-side sensor which are symmetrically distributed; the second insulating layer completely covers the sample-side sensor and the reference-side sensor. The integrally-formed main body core part is insulated from the outside by using the heat insulating layer, so that the heat loss is reduced, the complete machine is relatively small in heat capacity, and the high sensitivity and the relatively-small time constant of the differential scanning calorimeter are realized.

Description

technical field [0001] The invention relates to the field of measurement, in particular to a differential scanning calorimeter and a manufacturing method thereof. Background technique [0002] The principle of heat flow type differential scanning calorimeter (DSC) is to linearly control the change of temperature (such as heating, cooling or constant temperature) according to a certain ratio. The temperature difference from the sample; if the instrument constant of the instrument at a certain temperature is known, the heat flow value at that temperature can be calculated, and then the change of the continuous heat flow value within the dynamic scanning temperature range can be obtained. From this change curve, many thermophysical properties of the sample material and their generation mechanism can be analyzed. [0003] In general DSC, in an independent resistance heating furnace, sensors are placed on the bottom of the reference crucible and the sample crucible to measure th...

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Problems solved by technology

[0010] 1. The heat capacity of the furnace body is large, the heat capacity of the sensor plate is large, and there is a characteristic of heat transfer lag. Therefore, the time constant of the instrument is large, which is not conducive to the improvement of resolution;

[0011] 2. Since the sensor is directly coupled to the carrier disc, the disc is usually made of a metal with high thermal conductivity such as silver in order to improve the resolution. Due to the high thermal conductivity of the disc, the heat transfer interference between the reference and the sample becomes larger, which is harmful to the lifting instrument Sensitivity is an unfavorable factor;

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