The ceramic barium titanate a titanium oxide with high dielectric constant is extruded into a tube, disc or disk as the dielectric, and silver is plated on the ceramic as the electrode by the burn-in method.
It is also divided into high frequency porcelain dielectric and low frequency porcelain dielectric two. Capacitors with small positive capacitance temperature coefficient are used in highly stable oscillation circuits, as circuit capacitors and pad capacitors. Low-frequency dielectric capacitors are limited to circuits with low operating frequencies for bypass or DC isolation, or where stability and loss requirements are not high (including high frequency). These capacitors are not suitable for use in pulsed circuits because they are easily broken by the pulsed voltage.
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