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Does aluminum oxide conduct electricity?

December 29, 2023

Does aluminum oxide conduct electricity?

Aluminum oxide is an insulator and usually does not conduct electricity. Its crystal structure is generally electrically insulating, so in its crystalline form, aluminum oxide is not capable of conducting electricity.

However, in some cases, especially when certain impurities are present in the alumina or when specific treatments are applied, it can exhibit weak conductivity. This usually involves mixing the aluminum oxide with a conductive material, such as carbon black, or using special treatments. The electrical conductivity of this aluminum oxide is usually very low and not comparable to that of metals or other conductive materials.

Generally speaking, ordinary aluminum oxide is an insulator and does not conduct electricity. If conductive properties are required, other materials are often chosen, such as metals or conductive ceramics.

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