C 2.12 OTHER INORGANIC DIELECTRICS C 2.12.1 Class 3 ceramics The headlined type of ceramic capacitor are also called barrier layer capacitor. It consists of sintered granules of titanium oxides with semiconductor properties. On the surface of every granule there is created a capacitive barrier layer zone. The sum of ...
C 2.11 CERAMIC CAPACITORS CLASS 2 Ceramic Class 2 capacitors can be divided in two main groups, one with a moderate temperature dependence for the class - ΔC ≤ ±15% within the temperature range – and the other with such changes that only a fraction of the capacitance remains at ...
C 2.10 Ceramic Capacitors Class I Capacitors with Class 1 ceramic are manufactured with temperature coefficients between +100 and –1500 ppm/°C. In tables and diagrams we will confine ourselves to the type that is called NP0 or COG (0 ± 30 ppm/°C) and which is predominant over all remaining Class ...
C 2.9 INTRODUCTION to CERAMIC CAPACITORS Within the electrostatic capacitor family we can distinguish two groups: the organic film capacitors described on the foregoing pages and capacitors with inorganic dielectrics. Of these dielectrics we will start with the dominating ceramic materials. C 2.9.1 Construction The capacitors consist, as the name ...
C 2.6 POLYSTYRENE (PS) and POLYPHENYLENE SULFIDE (PPS) Polystyrene (PS) represents a non-polar dielectric material that just as polycarbonate to a great extent has been replaced by polypropylene. The availability is strongly limited due to ceased production. Polyphenylene Sulfide or simply PPS has come to stay mainly because of its ...
C 2.4 POLYPROPYLENE (PP) / KP and MKP In the book we use the common European abbreviations KP for film/foil and MKP for metallized film. C 2.4.1 Introduction Polypropylene (PP) is from a molecular point of view a non-polar dielectric with small losses and a relatively straight and moderate TC. ...
C 2.3 POLYESTER CAPACITORS (PET)/ KT and MKT Sometimes polyester capacitors are called Mylar. The abbreviation PET above comes from Poly Ethylene Terephtalate (also abbreviated PETP). On the pattern of European standards we use in this book the common abbreviations KT for film/foil design and MKT for metallized film. Otherwise ...
C 2.2 PAPER CAPACITORS Under this headline we deal mainly with pure paper dielectrics. At the same time we ought to say that combinations of paper and plastic, i.e. mixed dielectrics, are rather common. C 2.2.1 Paper / foil The history of the commercial capacitor started with paper foil dielectrics ...
C2.0 ELECTROSTATIC NON-POLARIZED CAPACITORS C2.1 CONSTRUCTIONAL SOLUTIONS The search for capacitance in small volumes has created a number of different solutions, each with its advantages and drawbacks. We shall try in this chapter to describe both methods and problems of achieving large C/V ratios. Further details may be added in ...
C1.6 CATEGORY CONCEPTS AND DERATING Recommendation for voltage derating means that the actual capacitor shall be used in the application at lower voltage than rated voltage. Derating is expressed usually by percentage of rated voltage that shall be subtracted. For example 20% derating means that the capacitor shall be used ...
