The laser ceramic cavity contains 99.7% aluminum oxide Al2O3 ceramic body, which is widely used as a laser reflector. This type of ceramic is spoon bonded at high temperatures to obtain .The required porosity is required. High reflectivity ceramic materials have an average spectral reflectance of over 97% in the visible light range (380nm-780nm). The advantage of gold-plated reflectors is their extremely long service life.