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Method for preparing composite thick film sensor of high molecular resistance type

A resistive, polymer technology, applied in the direction of instruments, scientific instruments, analytical materials, etc., can solve the problems of performance that cannot meet the needs of market segments, narrow test range, poor stability, etc., and achieve excellent anti-pollution performance, good electricity Effect of aging performance and mechanical aging performance, excellent water resistance

Inactive Publication Date: 2008-12-03
北京龙邦科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent years, with the wide application of humidity measurement and control technology in industrial and civil fields, the performance of domestic humidity sensors, especially the performance of resistive humidity sensors, has made great progress, but their performance cannot meet the needs of market segments
The reason is that the traditional conventional humidity sensor has poor long-term stability, narrow test range, large hysteresis, low linearity, etc.

Method used

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  • Method for preparing composite thick film sensor of high molecular resistance type
  • Method for preparing composite thick film sensor of high molecular resistance type
  • Method for preparing composite thick film sensor of high molecular resistance type

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] 1. Embodiment

[0013] 1. Clean the dense ceramic sheet 1 of 6mm×5mm×0.5mm in acetone solution for 10 minutes with ultrasonic waves, filter out the ceramic sheet, air-dry it at 50°C, and dry it at 120°C for 0.5 hour, and then screen the ceramic sheet with a spacing of 0.5mm, symmetrical porous graphite electrode 2 with a size of 4.5mm×2mm, screen-print 2mm×1mm gold paste on the lower part of the ceramic sheet, then dry it at 140°C for 0.5 hours, and then transfer it to a box furnace at a temperature of 900°C±50°C Next sintering.

[0014] 2. After the sintered ceramic chips are welded to the pins, they are evenly fixed on the coating tooling. Use a dispenser to add moisture-sensitive medium to the electrode surface in an amount of 0.01-0.05ml / piece. After the dropping is completed, the solvent evaporates and the surface After the film is formed, send the molded element into an oven and bake at 60-120°C for 3-5 hours.

[0015] 2.1 Synthesis of moisture-sensitive medium:...

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Abstract

The invention supplies a preparation method for macromolecule resistance thermal detection compound heavy film sensor. The features of the invention are: it has dense ceramic substrate, symmetry silk-screen rectangle porous graphite pole on one side of densifying ceramics, silk-screen gold paste on the terminal of the pole, soldering pins after metallization, distribution droplets response type humidity sense media, heating and concentrating to net polymer and complete physical entanglement and nail rivet with porous electrode. The positive effects of the invention are: (1) improving resistivity against water, electrical ageing, and mechanism aging resistance of the component;(2) supplying both physical entanglement and nail rivet point of network polymer, as well as proper space to contain pollutant; (3) the humidity sense media adopting environment protection solvent, and adopting high precision point glue machine, technique of mass production is simple and convenient; (4) component having high linearity, low wet stagnant, wide range, and suitable sensitivity.

Description

technical field [0001] The invention relates to a method for preparing a humidity sensor, in particular to a method for preparing a high-molecule resistive compound thick-film humidity sensor with wide range, low hysteresis, high linearity and small drift. Background technique [0002] In recent years, with the wide application of humidity measurement and control technology in industrial and civil fields, the performance of domestic humidity sensors, especially the performance of resistive humidity sensors, has made great progress, but their performance cannot meet the needs of market segments. The reasons are that traditional conventional humidity sensors have poor long-term stability, narrow test range, large hysteresis, and low linearity. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing a polymer resistive composite thick-film sensor. The humidity sensor prepared by the method has the characteristics of wide ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12G01N27/00H05K3/12
Inventor 刘积奎
Owner 北京龙邦科技发展有限公司
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