M.P.Rameela, T.H.Freeda and T.Asaithambi
The potassium dihydrogen phosphate (KDP), one of the materials having superior nonlinear optical properties has been employed for a large range of applications. Due to this interesting properties, we made an attempt to grow pure and potash alum doped KDP crystals in various concentrations (0.002, 0.004, 0.006, 0.008 and 0.010) using gel method. The grown crystals were collected after 20 days. We get crystals with good quality and shaped. The dc electrical conductivity (resistance, capacitance and dielectric constant) values were measured at frequencies in the range of 1 KHZ and 100 HZ of pure and potash alum added crystal with a temperature range of 40 0C to 130 0C using simple two probe setup with Q band digital LCR meter present in our lab. The electrical conductivity increases with increase of temperature. The dielectric constants of metal doped KDP crystals were slightly decreased compared to pure KDP crystals. SEM study was performed to indicate the influence of dopants on surface morphology of KDP crystals.
KDP, growth from gel method, electrical conductivity studies, SEM