Pyroelectric materials generate an electric charge in response to changes in temperature. When these materials are heated or cooled, the movement of electric dipoles within them creates a voltage. This property makes pyroelectric materials useful in various applications, such as sensors and energy harvesting devices. Common examples of pyroelectric materials include certain types of crystals, like quartz and tourmaline. These materials are often used in infrared sensors, which detect heat emitted by objects, and in thermal imaging systems. Their ability to convert thermal energy into electrical energy opens up possibilities for innovative technologies in energy efficiency and environmental monitoring.