In-depth analysis of the development direction of gas sensors

In recent years, due to the increasingly high requirements on the accuracy, performance, and stability of gas sensors in the fields of industrial production, home safety, environmental monitoring, and medical care, the research and development of gas sensors is becoming more and more important. With the application of advanced science and technology, the development trend of gas sensors is miniaturization, intelligence and multi-functionalization. In-depth study and understanding of the characteristics and interactions of organic, inorganic, biological and various materials, understanding of the working principle and mechanism of various gas sensors, correct selection of sensitive materials of various sensors, flexible use of micro-machining technology, and the formation of sensitive thin films Technology, microelectronics, fiber optics, etc., make the sensor performance optimization is the development direction of gas sensors.

Research and Development of New Gas Sensitive Materials and Manufacturing Processes Research on gas sensor materials shows that metal oxide semiconductor materials such as Zn0, SIlo2, and Fe203 have become mature, especially in gas detection such as C ratio, C2H5OH, and CO. Now the work in this area has two main directions: First, the use of chemical modification methods, doping, modification and surface modification of existing gas-sensitive membrane materials, and improve and optimize the film forming process The stability and selectivity of gas sensors; the second is the development of new gas-sensitive membrane materials, such as composite and hybrid semiconductor gas-sensitive materials, high-molecular gas-sensitive materials, making these new materials have high sensitivity and high selectivity for different gases. Sex, high stability. Because organic polymer sensitive materials have the advantages of rich materials, low cost, simple film making process, easy compatibility with other technologies, and working at room temperature, it has become a research hotspot.

The development of new gas sensors uses traditional principles of action and some new effects, preferential use of crystal materials (silicon, quartz, ceramics, etc.), the use of advanced processing technology and microstructure design, the development of new sensors and sensor systems, such as optical waveguide gas Development and use of sensors, supersonic surface acoustic waves and quartz resonant gas sensors, microbiological gas sensors and biomimetic gas sensors. With the application of new materials, new processes, and new technologies, the performance of gas sensors has become more perfect, making the sensors compact, miniaturized, and multi-functional with long-term stability, ease of use, and low cost.

Intelligent gas sensor With the continuous improvement of people’s living standards and the increasing emphasis on environmental protection, the detection of various toxic and harmful gases, the monitoring of atmospheric pollution, industrial exhaust gas, and the detection of food and living environment quality are all on gas sensors. Put forward higher requirements. The successful application of new material development technologies such as nanometer and thin film technology provides a good prerequisite for gas sensor integration and intelligence. Gas sensors will be developed on the basis of full use of multidisciplinary technologies such as micro-mechanics and microelectronics, computer technology, signal processing technology, sensing technology, fault diagnosis technology, and intelligent technology. The development of fully automatic digital smart gas sensors capable of simultaneously monitoring multiple gases will be an important research direction in this field.