Abstract
Steel substrates covered with ceramic insulating coating were tested for their ability to be used in thick film technology. The first intermediate ground coating was prepared by means of a special glass powder applied to the steel sheet and was fired at temperatures up to 960°C. The final coating was produced by screen printing or by some other method from a dielectric composition and fired at 800°C960°C. Various conductor and resistor compositions were screen printed on the substrates mentioned above and fired up to the required temperatures (650°C-860°C). By the above method, resistors with a relatively low temperature coefficient of resistance and a suitable long-term stability were achieved. Ceramic-coated steel substrates, unlike enameled substrates, make possible the application of resistor compositions designed for use on ceramic substrates.
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