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Research of the Chlorine Gas Sensor

Author: ZhongTieGang
Tutor: QuanBaoFu
School: Jilin University
Course: Microelectronics and Solid State Electronics
Keywords: Gas sensors Chlorine Complex oxides of Nb-In Cd3O2SO4
CLC: TP212
Type: Master's thesis
Year: 2007
Downloads: 175
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Abstract


Respectively , using chemical precipitation and high-temperature solid-phase method to prepare nano Nb-In the composite oxide Cd3O2SO4 material . X-ray diffraction ( XRD ) , transmission electron microscopy (TEM) method of the preparation of the material to characterize . By selecting the appropriate sintering temperature to prepare a the a good crystallization Nb - In composite oxide and Cd3O2SO4 nanomaterials . Matrix material prepared Nb-In composite oxide and Cd3O2SO4 of of nanomaterials , the development of high sensitivity , good selectivity the tube thick film chlorine sensor response and rapid recovery . Experimental results show that : a mass ratio of 1:9 Nb - In composite oxide of the element of the matrix material , at 100 ℃ chlorine sensitivity of the volume fraction of 50 × 10-6 to 7900, and the minimum detectable concentration was 0.2 × 10-6, the heating power of 130mW; to Cd3O2SO4 for the components of the matrix material , the sensitivity of 50 × 10-6 volume fraction of chlorine at 230 ℃ for 14000 , the minimum detectable concentration was 0.5 × 10-6 . In addition , a preliminary study of the mass ratio of 1:1 CdCl2 and ZnCl2 sensitive electrode fabrication NASICON solid electrolyte gas sensor Cl2 sensing properties of findings , components at 200 ° C Operating Temperature volume fraction (5 - 50 ) Cl2 sensitivity × 10-6 within 169.3mV/decade, response - the recovery time is 30s and 65s . Finally , a preliminary study of the mass ratio of 9:1 ZnSnO3 and WO3 sensitive electrode fabrication NASICON solid electrolyte gas sensor to H2S gas sensing performance , found that the volume fraction of components in the working temperature of 260 ℃ (5 - 50 ) × 10-6 within H2S sensitivity 75.8mV/decade, response - the recovery time for the 60s and 120s .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor
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