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The Piezoelectric effect was discovered in 1880 by Jacques and Pierre Curie
In 1880 Jacques and Pierre Curie discovered that when deformed under mechanical stress, quartz crystals became electrically charged – positively and negatively – on prism-shaped surfaces. They called this reaction the piezoelectric effect. Above a certain temperature (called the Curie temperature) these kinds of materials possess a cubic elementary cell with a centre of symmetry. The main areas of the positive and negative charges are found in the centre of the elementary cell of the crystal. The materials