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What is the best insulating ceramic thermal conductor?

April 26, 2017best ceramic conductor Insulating Thermal

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What is the best insulating ceramic thermal conductor?

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The best insulating (electrical) ceramic thermal conductive material is beryllium oxide (BeO). The material is an electric insulator yet conducts heat at the alarming rate of 280 W/mK (on average at room temperature). The next best is Al-N followed by Si and Al-O. BeO is versatile, easily metallized and can be used for many applications. There are some safety issues associated with BeO but when coated and placed in a package the concerns are greatly diminished.