1 Temperature characteristics of capacitance 🍏Are the parameters of aluminum electrolytic capacitors affected by the application environment?Capacitance varies with temperature. The change itself is determined by the rated voltage and capacitor size, from 25°C to the high temperature limit, the capacitance increase is generally not more than 10%. For the lowest rated temperature of -40℃, the [...]
1.1 Overview 😋Electrolytic capacitors should be called electrolytic capacitors because one of the electrical stages of such capacitors is not a metal but an electrolyte or metal oxide. In short, the conductive carriers of this electrode are no longer electrons but ions. This is the basic characteristic of electrolytic capacitors. Now. According to the characteristics of [...]
1.Overview 🐾Mica is an extremely important and excellent inorganic insulating material. As a dielectric material, it has not yet been found that the comprehensive properties of other materials can exceed mica. The advantages of mica are high dielectric strength, high dielectric constant, low loss, high chemical stability, good heat resistance, and easy shaving into thin sheets [...]
1 Application of large-capacity ceramic capacitors in general bypass 1.1 The role of bypass capacitors 🍏Bypass capacitors are usually connected in parallel across the power supply of a circuit unit (such as an IC) to reduce the power supply as much as possible over the entire operating frequency band or the frequency band where the circuit [...]
🌻An electrolytic capacitor differs significantly from other types in that its dielectric is an extremely thin anodic oxide film electrolytically generated on the valve metal, the thickness of which is closely related to the applied voltage. The oxide film is the heart part of the electrolytic capacitor, and its quality is related to the product performance, [...]
🍉Different from other chip components, use of multilayer ceramic capacitors may be damaged due to large stress due to the thin internal electrodes and dielectrics, and the dielectric is very brittle: the combination of internal electrodes and terminal electrodes of multilayer ceramic capacitors is also relatively Fragile. Therefore, relevant precautions should be observed when soldering multilayer [...]
🌕This article is about the failure analysis of ceramic capacitors, which may fail in different environments. 1.Influence of humidity on deterioration of electrical parameters 🌝When the temperature in the lost air is too high, the water film condenses on the surface of the capacitor shell, which can reduce the surface insulation resistance of the capacitor. In [...]
1 Frequency Characteristics of Ceramic Capacitor 🍉1.1 Q value and frequency characteristics of ceramic capacitor The capacitance of the first type of ceramic dielectric capacitors (such as COG) is substantially invariant with frequency over the entire usable frequency range. Q value and resonant frequency are important indicators when high-frequency/ultra-high-frequency capacitors are used in bad resonant circuits. [...]
Electrolytic capacitors aluminum foil corrosion process is widely used in industrial production.In actual industrial production, the tunnel corrosion process is generally used, including the steps of pre-stage chemical treatment → pre-stage electrolytic corrosion → post-stage electrolytic corrosion → post-stage chemical treatment. 1 Tunnel etching process ☘️1.1 Pre-chemical treatment The annealed electrolytic capacitors electrolytic capacitors aluminum foil [...]
🔊In the production of aluminum electrolytic capacitors, increasing the capacitance value per unit volume is the direction of continuous improvement of capacitors. The capacitance is proportional to the effective area of the electrode surface, so the most effective way to expand the capacitance of aluminum electrolytic capacitors is to increase the effective surface area of the [...]