What is the main material used in the construction of a capacitor's dielectric?

The main material used in the construction of a capacitor's dielectric is an insulating material. The dielectric serves a crucial role in a capacitor, as it is placed between the conductive plates and prevents direct contact while storing electrical energy. This insulating material is essential because it allows the capacitor to maintain its charge without allowing current to flow through it, distinguishing it from conductive materials which would not effectively serve in this role.

The effectiveness of the dielectric material influences the capacitor's ability to store charge, its voltage rating, and its overall performance in electronic circuits. Common dielectric materials include ceramics, plastic, glass, and other non-conductive substances, which provide the necessary insulation and dielectric properties to enhance the capacitor's functionality.