Hydrothermal synthesis and characterization of non-linear optic potassium pentaborate(KB5)
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Alkali metal borates having outstanding pyhsical properties have drawn much concern, both theoretically and experimentally. Potassium pentaborate stands out of such borates owing to usage of non-linear optics(NLO) . The reason why the alkali metal borates display non-linear optical properties is the various coordination possibilities of boron atom . In addition to NLO properties, KB5 can be also used as a film to prevent oxidation, cover fluxes, flame retardant and inhibition of cements . KB5 can be synthesized more easily than the common NLO materials ADP and KDP [4,5]. A number of research articles have been published in the literature discussing the growth and NLO properties of KB5 crystals [6-10]. We synthesized potassium pentaborate tetrahydrate (ICDD: 25-624) by hydrothermal method in a short time using KOH and H3BO3 as raw materials. The synthesized material was characterization by powder X-ray powder diffraction (XRD), fourier transform infrared spectroscopy (FTIR) and thermo gravimetric/differential thermal analysis (TG/DTA).