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XMCERA | Ceramic Sensor Body

Ceramic Sensor Body

Ceramics have a variety of electromagnetic properties such as insulation, magnetism, dielectric, electrical conductivity (semi-conductivity).

Compared with metal sensor materials, ceramic sensor materials are mainly characterized by high elastic performance, small lag, and good fatigue resistance, long-term stability and corrosion resistance at small displacement. Before ceramics are broken, the stress-strain relationship is always linear, which is most suitable for the production of elastic elements at high temperature. At the same time, the price of ceramic materials is low, so the ceramic materials are highly valued in the sensor materials.

Ceramic sensor body is widely used in low pressure and high vacuum, corrosive situation, and occasion of abrasion for its following features (see below table).

High reliability High stability Fatigue resistance Fatigue resistance Frequency insulation
corrosion resistance Corrosion resistance Mechanical properties Temperature resistance

ceramic sensor body combination

▼ Features

• By controlling its composition and sintering conditions, the microstructure of ceramics is easy to adjust. Microstructure has a significant influence on all properties of ceramics, including their electrical, magnetic, optical, thermal and mechanical properties.

• Ceramic materials are often used in high-temperature processes due to their high temperature resistance and strong resistance to adverse environmental effects.

• Ceramics are mainly made from inexpensive materials, which means that sensors made from them will also be cheap.

• The structural characteristics of a ceramic are closely related to the grain (block), the surface separating adjacent grains (intergrain boundaries), the interface separating the surface and space of the grains, and the pores in the structure. Because of these varied properties, sensors can be manufactured using the properties of both ceramic blocks and ceramic surfaces.

▼ Applications

• Low pressure and high vacuum:

Ceramic sensors can measure differential pressures of less than 3.5mmHg compared to conventional sensors and can withstand vacuum without damage or degradation of product performance.

• Corrosive situation:

Ordinary metal film sensors in this situation need to rely on rare materials for protection, and even need to reduce the impact of corrosion to their own, resulting in higher manufacturing costs, the number of spare parts to increase the shortcomings. The ceramic sensor has the characteristic of chemical corrosion resistance so that the products can be used in almost any acidic situation.

• Occasion of abrasion:

Metal diaphragm sensors have proved difficult to use in abrasive situations (e.g., pulp, mining and metals, wastewater), where they cannot be connected with standard taper threads and are prone to product clogging. Although the clogging problem can be solved with flat inserts, the metal diaphragm can be damaged by the abrasion of the product. The above two problems can be solved by using the abrasion resistance of ceramic materials and the flat embedding method to install ceramic sensors. Flat ceramic sensors have been successfully used in pulp and paper production processes, as well as other clogging and abrasive situations.

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