Hmérsékletkoefficiens

Hmérsékletkoefficiens, often translated as temperature coefficient, is a parameter that quantifies how a physical property of a material changes with temperature. It is typically expressed as a fractional change per degree Celsius or Kelvin. This coefficient is crucial in understanding and predicting the behavior of various materials and devices under varying thermal conditions. For example, in electronics, the resistance of many conductors increases with temperature, and this change is described by the temperature coefficient of resistance. Similarly, the properties of semiconductors, such as their band gap, also exhibit temperature dependence, quantified by their respective temperature coefficients. In chemistry, reaction rates are strongly influenced by temperature, and the Arrhenius equation relates the rate constant to temperature via an activation energy, which can be seen as related to a temperature coefficient. The sign of the temperature coefficient indicates whether the property increases (positive coefficient) or decreases (negative coefficient) with increasing temperature. Materials with low temperature coefficients are often preferred in applications where stable performance over a range of temperatures is required, such as precision instruments and sensors.