Ceramic Dialectric Coupling

The characteristics of a capacitor vary mainly depending on the dielectric material used.

Ceramic dialectric coupling.

Within the ceramic capacitor family there are many forms of ceramic dielectric that are used. They are suitable for bypass coupling and decoupling applications or for frequency discriminating circuits where low losses and high stability of capacitance are less important. High performance applications include medical imaging inkjet printing and actuators. Common types include c0g np0 x7r y5v z5u although there are many more.

C0g also commonly known as np0 is an ultra stable dielectric material. The ceramic capacitor gains its name from the fact that it uses ceramic materials for its dielectric. The ceramic dielectric is characterized by a nonlinear change of capacitance over the temperature range. This ceramic dielectric material has low relative permittivity.

Dielectric loss factor loss tangent the dielectric loss factor also known as dissipation factor is defined as the tangent of the loss angle tan d the loss factor represents the ratio of resistance to reactance of a parallel equivalent circuit of the ceramic element figure 3. Polar and non polar capacitors. Dielectric constant low dielectric losses and improved electromechanical coupling coefficients. Higher dielectric permittivity and coupling results in higher sensitivity in material type.

Non polar capacitors include ceramic film and paper capacitors. A class of ceramic dielectrics is further divided into sub classes depending on the temperature characteristics of the materials. The dielectric material determines the capacitance value energy efficiency and size of a capacitor.