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Alumina (Al₂O₃) metallized ceramic insulator|Alumina (Al₂O₃) metallized ceramic insulator is a type of ceramic insulator made from alumina (aluminum oxide, Al2O3) material with a metallized layer or coating on its surface. This metallized layer is typically composed of materials like silver (Ag) or copper (Cu) and is applied to the ceramic surface through various processes. Alumina ceramic is an