Capacitance Ageing of Ceramic Capacitors

PublishTime：2022-01-04

● Capacitor ageing (Capacitance Drift) is a term used to describe the negative, logarithmic capacitance change that takes place in ceramic capacitors with time. The ageing process has a negligible affect on Class 1 (C0G) product but should be taken into account when measuring Class 2 (X7R,Y5V & Z5U) product.
● The crystalline structure for Barium Titanate based ceramics changes on passing through its Curie temperature (known as the Curie Point) at approximately 125oC. The domain structure relaxes with time and in doing so, the dielectric constant reduces logarithmically, this is known as the ageing mechanism of the dielectric constant. The more stable dielectrics have the lowest ageing rates.
● The start point for the ageing process is indicated for all product supplied by Syfer by the date stated on the packaging labels. If the ageing start point is not known then the ageing process can be reset by heating the capacitors to a temperature above the Curie Point. The ageing process then starts again from zero.

Brand of Product：	Knowles
Part#：
Product Category：	Ceramic Capacitors More
Application：	More
Data Type：	Application note & Design Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	2014/5/19
Version Number：	Issue 4
Data Encoding：	AN0006
Data Size：	573 KB

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