rO(2) thin films were deposited by a wet chemical sol-gel method from force
d hydrolysis of aqueous ZrOCl2 solution. Transmission electron microscopic
observations confirmed the existence of little nanosized monoclinic ZrO2 pa
rticles in clear stable ethanolic ZrO2 colloidal suspensions. Twenty layers
of ZrO2/SiO2 high reflectance filters using a quarterwave stack were fabri
cated by sol-gel spin-coating on K9 glass substrate. This filter exhibits a
wide reflectance band near 1064 nm and a high transmittance region. (C) 20
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