By U.v. Okpala, F.i. Ezemaa*, R.u. Osujia
The optical properties of potash doped lead chloride (PbCl2) have been studied by sol gel
technique. The optical properties of the materials were determined using a JENWAY 6405
UV-VIS spectrophotometer operating at a wavelength range of 200nm to 1200nm at an
interval of 5nm. It was observed that the crystals are optically transparent. The average
refractive index (n) is between 0.6 and 2.9. The refractive index greater than 2.0 makes the
crystals good materials for protective coatings. The band gaps are from 3.9 to 5.0 showing
that they are wide band gap materials and are good refractory materials.