Are special ceramics such as zirconia ceramics and alumina ceramics electroceramics?
The answer is yes. Zirconia ceramics, ZrO2 ceramics, and Zirconia Ceramics have high melting and boiling points, high hardness, insulators at room temperature, and electrical conductivity at high temperatures. Zirconia/alumina ceramics can be used in some electronic products such as the back cover of mobile phones.
Electronic ceramic refers to ceramics that can utilize electrical and magnetic properties in the electronics industry. Electroceramics are ceramics with new functions that are finally obtained through precise control of the surface, grain boundaries and size structure. It can be widely used in energy, household appliances and automobiles.
A sintered body material mainly composed of oxides, which is widely used for making electronic functional components. The manufacturing process of Electroceramics is roughly the same as the traditional ceramic process.
Electroceramics, or ceramics for the electronics industry, are essentially different from general power ceramics in terms of chemical composition, microstructure, and electromechanical properties. These differences are formed by a series of special technical requirements put forward by the electronics industry for Electroceramics, the most important of which are high mechanical strength, high temperature and humidity resistance, radiation resistance, and a medium constant that varies within a wide range. The dielectric loss angle is small, and the temperature coefficient of capacitance can be adjusted (or the rate of change of capacitance can be adjusted). High electrical strength and insulation resistance, and excellent aging properties.
Talc porcelain in Electroceramics has excellent electrical insulation and low cost, and is a typical high-frequency device porcelain used in radio frequency bands. Alumina porcelain is a kind of high frequency, high temperature and high strength device porcelain with better electrical insulation. Its electrical and physical properties increase with the increase of aluminum oxide content. Commonly used are high alumina alumina containing 75%, 95% and 99% alumina. In some extremely demanding integrated circuits, even pure corundum porcelain with an aluminum oxide content of 99.9% is used, whose properties are similar to sapphire single crystals. The disadvantage of high alumina ceramics, especially pure corundum porcelain, is the difficulty of manufacturing, high firing temperature and high price.