This material has a high electrical resistivity and thermal conductivity. It is therefore suited to the high performance electronic industry, for such applications as integrated circuit packages and heat sinks. Compared with Beryllia in such applications, it is non-toxic and has about half the thermal expansion coefficient. It is translucent to infrared and visible wavelengths (0.5 to 3 µm), and can be used as window material for infrared and radar. It has a high purity and can be used as crucible material for molten metals at high temperatures.