Why Are Ceramic Materials Used as Dielectric Materials?

Ceramic capacitors are a type of capacitor made with ceramic materials as the dielectric. In electronic circuits, the main function of capacitors is to store charge and release it when needed to maintain the stable operation of the circuit.

So why are ceramic materials used as the dielectric for making capacitors instead of other materials?

Ceramic materials have a high dielectric constant.

The dielectric constant is a key parameter that measures the ability of a capacitor to store charge. A high dielectric constant means that more charge can be stored in the same volume, resulting in a higher capacitance value.

Ceramic capacitors using high dielectric constant ceramics as the dielectric have a higher capacitance value compared to capacitors of the same volume. This makes ceramic capacitors perform excellently in circuits requiring high capacitance values.

Ceramic materials have excellent stability and reliability.

The stable crystal structure of ceramics enables them to maintain stable performance even in harsh environments such as high temperature, high pressure, and high humidity. Therefore, ceramic capacitors made from ceramic materials are resistant to high temperatures, high pressures, and moisture.

Furthermore, ceramic materials have high mechanical strength, do not deform, and have strong resistance to vibration. These characteristics enable ceramic capacitors to maintain stable performance even in complex working environments.

Ceramic materials have good insulation properties.

Ceramic materials exhibit good insulation properties, effectively preventing charge leakage between electrodes in capacitors, improving operational efficiency, and ensuring the stable operation of circuits.

In comparison, other materials cannot match the level of ceramic materials in certain aspects. For example, plastic materials. Although plastic materials are convenient to process and inexpensive, they are prone to deformation or failure in high temperature and high-pressure environments, failing to meet the requirements of certain specific application scenarios.

That’s why ceramic capacitors use ceramic materials as the dielectric. Choosing ceramic materials as the dielectric for making capacitors is the preferred option.

This article is provided by JYH HSU (JEC) Electronics. JEC is a research, development, production, and sales-oriented company specializing in manufacturing and selling various electronic components such as capacitors and resistors.