What are the requirements for elastomers in the manufacture of pressure sensors?

There are many requirements for elastomer in the manufacture of pressure sensor, which ensure the performance, accuracy and reliability of the sensor. The following are some key requirements: in terms of material selection, elastomer materials usually need to have good elastic energy storage capacity, which can be restored to the original state without permanent deformation after stress deformation. Common materials include aluminum alloy, alloy steel and stainless steel. For certain types of sensors, such as capacitive pressure transmission

For sensors, elastomer materials such as polydimethylsiloxane may be used. In terms of structural design, the structural design of the elastomer directly affects the input-output relationship of the sensor. For example, the basic parameters of the elastomer diaphragm of the sputtering film pressure sensor are determined in the design stage, which basically determines the input-output relationship of the sensor. The design of the elastomer may include special structures such as bell mouth, so as to facilitate the measurement of viscous media and prevent clogging.

In terms of machining and heat treatment, the manufacturing process of elastomer includes fine machining and heat treatment steps. These steps ensure that the foreign body has the required shape, size and mechanical properties. For example, an elastomer may need to go through grinding, polishing and other processes to reach the required surface.

Smoothness

In terms of compressive strength and stability, the elastomer needs to have enough compressive strength to withstand the pressure change during measurement without damage. At the same time, the stability of elastomer is also very important to ensure that the sensor can maintain accurate measurement results under different environmental conditions. In the aspect of temperature sensitivity, temperature change will affect the physical properties of elastomer, so the selection and design of elastomer need to consider its temperature sensitive parts. Proper material and structural design can reduce the influence of temperature on the sensor performance. In terms of adhesive properties, for some types of sensors, such as capacitive pressure sensors, the elastic properties of elastomer have an important influence on the performance of sensors. By controlling the cross-linking density and degree of elastomer, the sensitivity, hysteresis and recovery rate of sensors can be optimized.

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To sum up, the requirements for elastomer in the manufacture of pressure sensor involve many aspects, such as material selection, structural design, mechanical processing and heat treatment, compressive strength and stability, temperature sensitivity and viscoelastic properties, etc. The satisfaction of these requirements ensures that the sensor can accurately and reliably measure pressure changes.