Ceramic capacitors are capacitors made using high-dielectric constant materials such as barium titanate and titanium dioxide. These materials are pressed into shapes like tubes, disks, or plates, which serve as the dielectric, and electrodes are formed by applying silver through sintering.
As an essential component in electronic circuits, ceramic capacitors are widely used in various electronic devices due to their advantages such as small size, high voltage tolerance, excellent frequency characteristics, and good stability.
However, ceramic capacitors may crack during use, affecting their functionality and potentially posing risks to circuits and equipment.
What Causes Cracks in Ceramic Capacitors?
Ceramic capacitor cracking typically manifests as physical structural damage. This damage can lead to electrolyte leakage or structural failure, causing unintended contact between the electrodes that should be isolated. This contact results in a short circuit, potentially damaging the component or equipment, or even causing fires.
Possible Causes of Ceramic Capacitor Cracks
Mechanical Stress
Ceramic capacitors may develop visible cracks or internal micro-cracks when subjected to mechanical stress during operation.
Temperature Changes
Studies indicate that as the temperature rises, the strength of ceramic capacitors decreases, and internal micro-cracks increase, ultimately leading to fractures.
Overvoltage
Overvoltage can increase the electric field strength inside the capacitor, causing localized dielectric breakdown. When this occurs, the internal structure of the capacitor may be damaged, leading to cracking.
Material Quality
Quality issues in ceramic materials, such as impurities, pores, or internal stresses, can make capacitors prone to cracking during use.
In summary, various factors, including mechanical stress, temperature fluctuations, overvoltage, and material quality, can contribute to the cracking of ceramic capacitors.
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Post time: Dec-03-2024