High-insulation easily-rheological thermocouple boron nitride-based filling material and filling method

A technology of filling materials and boron nitride, which is applied in the direction of insulators, inorganic insulators, and thermometers using electric/magnetic elements that are directly sensitive to heat, can solve problems such as the inability to ensure effective insulation of thermocouples, and achieve stable and reliable quality. Simple, rheologically enhancing effect

Pending Publication Date: 2021-12-28
常州精瓷仪器科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency that the existing filling materials cannot guarantee the effective insulation of the thermocouple during operation, the present invention provides a high-insulation and rheological thermoelectric boron azide-based filling material and a filling method

Method used

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  • High-insulation easily-rheological thermocouple boron nitride-based filling material and filling method
  • High-insulation easily-rheological thermocouple boron nitride-based filling material and filling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (a) Mix 85 parts of boron nitride, 15 parts of glass powder, and 1.5 parts of binder to form a mixed powder;

[0025] (b) One-step grinding of the mixed powder;

[0026] (c) Weighing the ground mixed powder and putting it into a tablet press to prepare a filling material block;

[0027] (d) Put the filling material block and thermocouple wire into the stainless steel casing, set the temperature rise program for heat treatment and drawing.

Embodiment 2

[0028] Embodiment 2: 80 parts of boron nitride, 10 parts of glass micropowder, and 1 part of binder are mixed evenly to form a mixed powder;

[0029] (a) One-step grinding of the mixed powder;

[0030] (c) Weighing the ground mixed powder and putting it into a tablet press to prepare a filling material block;

[0031] (d) Put the filling material block and thermocouple wire into the stainless steel casing, set the temperature rise program for heat treatment and drawing.

Embodiment 3

[0033] (a) 90 parts of boron nitride, 20 parts of glass powder, and 2 parts of binder;

[0034] (a) One-step grinding of the mixed powder;

[0035] (c) Weighing the ground mixed powder and putting it into a tablet press to prepare a filling material block;

[0036] (d) Put the filling material block and thermocouple wire into the stainless steel casing, set the temperature rise program for heat treatment and drawing.

[0037] Boron nitride is h-BN layered structure powder, the size of h-BN layered structure powder is 5-8μm, and the coefficient of thermal expansion (CTE) is 10.3×10-6 K-1. The thermal expansion coefficient and particle size of glass micropowder are selected to match, such as SiO2-Na2O-K2O3 system.

[0038] combined with figure 1 And attached figure 2 As shown, the h-BN layered structure micropowder is a polar covalent bond system, there is an intermolecular force between the layers, and there are no free electrons in the h-BN crystal layer structure, so it ...

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Abstract

The invention relates to the field of boron nitride-based filling materials, and concretely relates to a high-insulation easily-rheological thermocouple boron nitride-based filling material and a filling method. The material comprises, by weight, 80-90 parts of boron nitride, 10-20 parts of glass micropowder and 1-2 parts of a binder. The rheological property of the filling material is improved by adding the glass micro powder. An h-BN ceramic block formed by extrusion is used as a possible filling material for thermocouple application, has a composite structure of a layered ceramic main body and a glass liquid phase surface in a working state, and can meet multiple requirements of high-temperature insulativity, structural stability, interface lubricity and the like of a sealing material. The filling material and a preparation method thereof are low in cost, simple to prepare, stable and reliable in quality and suitable for industrial batch preparation.

Description

technical field [0001] The invention relates to the field of boron nitride-based filling materials, in particular to a high-insulation and easy-rheology thermoelectric boron nitride-based filling material and a filling method. Background technique [0002] Thermocouple sensors are the most commonly used contact temperature measurement devices in the industry. They can directly convert heat energy into electrical signals and output DC voltage signals, and can quickly display, record and transmit temperature data. From the perspective of research trends at home and abroad, high-precision and fast-response ultra-fine thermocouples are the mainstream of current research. Their advantages are mainly stable performance, large temperature measurement range, and long-distance signal transmission. They are also simple in structure and easy to use. Thermocouples are mainly composed of thermocouple wires, insulating filling materials, protective sleeves and junction boxes. The test tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B3/02H01B3/08G01K7/02
CPCH01B3/08H01B3/025G01K7/02
Inventor 王晓春蒲健冯江涛池波
Owner 常州精瓷仪器科技有限公司
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