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Formaldehyde sensitive component and method for producing sensitive component

A technology of sensitive components and manufacturing methods, which is applied in the direction of measuring devices, material analysis through electromagnetic means, instruments, etc., to achieve the effect of improving stability and good stability

Inactive Publication Date: 2010-07-28
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the disadvantages of long response time, long recovery time and high working temperature in the existing sensitive elements for measuring formaldehyde, the present invention provides a formaldehyde sensitive element and its production method

Method used

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  • Formaldehyde sensitive component and method for producing sensitive component
  • Formaldehyde sensitive component and method for producing sensitive component
  • Formaldehyde sensitive component and method for producing sensitive component

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specific Embodiment approach 1

[0016] Specific embodiment one: the general formula of the sensitive material in this embodiment is B 2-a A b o 3 , wherein A is Sn, Pb, Ti or Zr, B is Mo, W, Cr or Mn, 0

[0017] The sensitive material in this embodiment is prepared by a conventional combustion method.

specific Embodiment approach 2

[0018] Embodiment 2: In this embodiment, A is Pb, Ti or Zr. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0019] Embodiment 3: In this embodiment, B is Mo, Cr or Mn. Others are the same as in the first embodiment.

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Abstract

This invention is a manufacturing method of the sensitive material, formaldehyde sense organ made by sensitive material and the sense organ. It relates to a sensitive material that can detect formaldehyde, sense organ that can measure the viscosity of formaldehyde and the manufacturing method. This invention settles the problem of long-time response and recovery, high working temperature of the current sense organ to detect formaldehyde. The general formula of the sensitive material is B2-aAbO3, A is Sn,Pb,Ti or Zr, B is Mo, W,Cr or Mn, 0<a=b<1. The sense organ consists of explosion-prevention net, two heating probes, four detecting probes, thick-film sense organ, probe basis, connecting work and heating device. This invention has such merits as low detecting viscosity of formaldehyde, low working temperature, short response time and high stability of the sense organ.

Description

technical field [0001] The invention relates to a sensitive element for measuring formaldehyde concentration and a preparation method thereof. Background technique [0002] The metal oxide formaldehyde sensitive element materials that have been studied so far mainly include SnO 2 NiO-based, NiO-based, and CuO-based, among which NiO-based thin film sensitive elements can detect a minimum of 25ppm formaldehyde at 600°C, with a response time of 10 seconds and a recovery time of 1 to 3 minutes; SnO 2 Based on sintered body type sensitive element, at 600°C, the lowest detectable formaldehyde is 0.2ppm, but the response and recovery time are long, both in the range of several minutes; -4 mol / L formaldehyde has good sensitivity. However, the stability of these materials has not been reported. In addition, sensitive elements made of these materials also have the disadvantages of long response-recovery time and high operating temperature. Contents of the invention [0003] I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N35/00G01N27/00
Inventor 霍丽华P·苏曼赵辉高山程晓丽
Owner HEILONGJIANG UNIV
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