A quartz-based micro catalytic methane sensor by high resolution screen printing

Wenshuai Lu, Gaoshan Jing, Xiaomeng Bian, Hongyan Yu, Tianhong Cui

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A micro catalytic methane sensor was proposed and fabricated on a bulk fused quartz substrate using a high resolution screen printing technique for the first time, with reduced power consumption and optimized sensitivity. The sensor was designed by the finite element method and quartz was chosen as the substrate material and alumina support with optimized dimensions. Fabrication of the sensor consisted of two MEMS processes, lift-off and high resolution screen printing, with the advantages of high yield and uniformity. When the sensor's regional working temperature changes from 250 °C to 470 °C, its sensitivity increases, as well as the power consumption. The highest sensitivity can reach 1.52 mV/% CH4. A temperature of 300 °C was chosen as the optimized working temperature, and the sensor's sensitivity, power consumption, nonlinearity and response time are 0.77 mV/% CH4, 415 mW, 2.6%, and 35 s, respectively. This simple, but highly uniform fabrication process and the reliable performance of this sensor may lead to wide applications for methane detection.

Original languageEnglish (US)
Article number025021
JournalJournal of Micromechanics and Microengineering
Volume26
Issue number2
DOIs
StatePublished - Jan 14 2016

Bibliographical note

Funding Information:
The work of this paper is partly supported by Shanxi Chuangqi Co. Ltd. The authors also thank Y Peng, T Zeng, Beijing Capitalbio Co. Ltd., Kunshan SIBCO Co. Ltd., and the Engineering Research Center for Navigation Technology at Tsinghua University for the provision of related micro machining and characterization services.

Publisher Copyright:
© 2016 IOP Publishing Ltd.

Keywords

  • MEMS
  • methane sensor
  • screen printing

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