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Temperature sensor based on NTC (Negative Temperature Coefficient) heat-sensitive material and applied to high-temperature measurement
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A technology of temperature sensor and heat-sensitive material, which is applied in the direction of directly heat-sensitive electrical/magnetic elements such as thermometers, thermometers, and measuring heat. Ease of use and strong weather resistance
Inactive Publication Date: 2018-11-13
SHENZHEN MINGCHUANG AUTOMATIC CONTROL TECH CO LTD
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[0003] NTC thermal material is a sensitive material with a negative temperature coefficient, which has the advantages of fast response, low cost, small size, and high sensitivity. However, the current NTC thermal material is not suitable for high temperature measurement
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preparation example Construction
[0025] The preparation steps for the thermistor substrate described in the application are as follows:
[0027] (a) Weigh CaCO according to the stoichiometric ratio 3 , CeO 2 、TiO 2 、WO 3 , Fe 2 o 3 Powder, wherein, the main raw material that above-mentioned process is used is as follows table 1
[0030] Then, use wet ball milling to mix the powder evenly and refine the powder, control the mass ratio of powder to zirconium balls to be 1:3, and the mas...
Embodiment
[0037] A thermistor substrate for high temperature measurement based on NTC thermosensitive material, the thickness of the thermistor substrate is 100-200 μm, the length can be 450-500 μm, and the width can be 300-350 μm. The thermistor substrate is a NTC thermosensitive ceramic material with a core-shell structure based on Fe-Ca-Ce-Ti-W-O; specifically, the core structure is CaWO 4 -0.3Fe 2 (WO 4 ) 3 -0.2CeTi 2 o 6 , the shell structure is SiO 2 .
[0038] About shell-structured SiO 2 , the SiO 2 Prepared by hydrothermal method.
[0039] Regarding the nuclear structure, the CaWO 4 -0.3Fe 2 (WO 4 ) 3 -0.2CeTi 2 o 6 is made of CaCO 3 , CeO 2 、TiO 2 、WO 3 , Fe 2 o 3 The powder is formed by ball milling, calcining, and ball milling again, and its particle size is preferably 2-5 μm.
[0040] The preparation steps for the thermistor substrate described in the application are as follows:
[0041] Step 1, powder preparation
[0042] (a) Weigh CaCO according to ...
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Abstract
The invention relates to a temperature sensor based on an NTC (Negative Temperature Coefficient) heat-sensitive material and applied to high-temperature measurement. The temperature sensor comprises athermistor substrate, wherein the thermistor substrate is in a rectangular shape, a wire A and a wire B are respectively welded to the two opposite sides of the rectangular-shaped thermistor substrate, the wire A is welded to the first surface of the thermistor substrate, the wire B is welded to the second surface of the thermistor substrate, the thermistor substrate can be clamped by the wire Aand the wire B, a packaging layer is arranged outside the thermistor substrate, the wire A and the wire B, and the thermistor substrate is an NTC heat-sensitive ceramic material which is of a core-shell structure and based on Fe-Ca-Ce-Ti-W-O; specifically, the core structure is CaWO4-0.3Fe2(WO4)3-0.2CeTi2O6, and the shell structure is SiO2.
Description
technical field [0001] The present application relates to the technical field of temperature sensors, in particular to a temperature sensor based on NTC thermosensitive material for high temperature measurement. Background technique [0002] The temperature sensor is the core component of the temperature measuring instrument, which can sense the temperature of the measured medium and convert it into a usable output signal, thereby realizing temperature measurement. In the field of temperature measurement, heat-sensitive materials are the core of temperature sensors, which are extremely sensitive to temperature changes. Currently, heat-sensitive materials that are widely used include PTC heat-sensitive materials and NTC heat-sensitive materials. [0003] NTC thermosensitive material is a sensitive material with a negative temperature coefficient, which has the advantages of fast response, low cost, small size, and high sensitivity. However, the current NTC thermosensitive mat...
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