SODYUM BORATLARDAN POTASYUM BORAT SENTEZİ: REAKSİYON KOŞULLARININ OPTİMİZASYONU

Potasyum boratlar; spesifik özelliklerinden dolayı metal rafine etme endüstrisinde, yapı bileşiklerinde, fiberglas malzeme olarak, yağlayıcılarda olduğu gibi doğrusal olmayan optik malzemelerde kullanılabilen önemli bileşiklerdir. Bu çalışmada, 01-072-1688 toz difraksiyon kart numarasına sahip spesifik bir potasyum pentaborat (KB5O8·4H2O) olan santit minerali hidrotermal metotla %90-96 verimle sentezlenmiştir. Potasyum kaynağı olarak potasyum klorür (KCl) ve bor kaynağı olarak tinkalkonit (Na2B4O7·5H2O), boraks (Na2B4O7·10H2O), borik asit (H3BO3) ve bor oksit (B2O3) kullanılmıştır. Reaksiyon sıcaklıkları 60 ve 90ºC, reaksiyon süreleri 15 – 120 dakika aralığında belirlenmiştir. Difraktometresi (XRD), Fourier transform infrared (FT-IR) ve Raman spektroskopileri ve yüzey morfolojilerinin incelenmesi içinde taramalı elektron mikroskobu (SEM) kullanılmıştır

POTASSIUM BORATE SYNTHESIS FROM SODIUM BORATES: OPTIMIZATION OF REACTION CONDITIONS

Potassium borates are the important compounds due to their specific properties and can be used as in metal refining industry, in construction compounds, as fiberglass material, as in lubricants and in non-linear optical materials. In this study, a specific potassium pentaborate (KB5O8·4H2O) compound of santite mineral, with a powder diffraction number of 01-0721688 was synthesized through a hydrothermal route with reaction efficiencies between 90-96%. The main potassium source was potassium chloride (KCl) and the boron sources were tincalconite (Na2B4O7·5H2O), borax (Na2B4O7·10H2O), boric acid (H3BO) and boron oxide (B2O3). Reaction temperatures were determined between 60 and 90oC and reaction times between 15 and 120 minutes. Synthesized minerals were characterized by Xray diffraction (XRD), Fourier transform infrared (FT-IR) and Raman spectroscopies and surface morphologies were determined by scanning electron microscopy (SEM). *Corresponding Author: moroydor@yildiz.edu.tr

Keywords:

Potassium borates, Hydrothermal synthesis, Characterization XRD,

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Adair, A. 2007. Understanding the elements of Periodic Table: Boron,
The Rosen Publishing Group, United States. Beatty, R. 2006. The Elements:
Boron, Marshall Cavendish, New York. Asensio, M.O., Yildirim, M., Senberber F.T., Kipcak A.S. and Derun, dehydration characterization of synthesized potassium borates, Research on Chemical Intermediates, vol. 42, pp. 4878. Thermal and Kipcak, A.S., Gunal, M., Ila, S.,
Yildirim, M., Piskin, M.B and Derun, E.M. Optimum B2O3, KCl and NaOH Molar Ratios in the Synthesis of Potassium Borates, Celal Bayar University Journal of Science, vol. , pp. 409-412. Youngman, R.E. and Zwanziger, J.W. 1996. Network Modification in Potassium
Structural Studies with NMR and Raman Spectroscopies, The Journal of Physical Chemistry, vol. 100, pp. 16728. Glasses: Wu, Q. Potassium pentaborate,
Crystallographica, vol. E67, pp. sup-1 - sup-7. Acta Wang. G.M., Sun, Y.Q., Zheng, S.T. and Yang, G.Y. 2006. Synthesis and Crystal Structure of a Novel Potassium Unprecedented Anion, anorganische und allgemeine Chemie, vol. 632, pp. 1586-1590.
Zhang, H.X., Zhang, J., Zheng, S.T. and Yang, G.Y. 2004. Two New
Potassium Borates, K4B10O15(OH)4 with KB5O7(OH)2.H2O with Double Helical Chain, Crystal Growth and Design, vol. 5, pp. 157-161. and Li, P. and Liu, Z.H. 2011. Standard
Molar Enthalpies of Formation for the Borates,Na6[B4O(OH)4]·8H2O and K4[B10O15(OH)4], Journal of Chemical and Engineering Data, vol. 56, pp. 102-105. Metal Salentine, C.G. 1987. Synthesis, Characterization,
Structure of a New Potassium Borate, KB3O5·3HO, Inorganic Chemistry, vol. 26, pp. 128-132. Liu, Z.H., Li, P., Li, L.Q. and Jia, Q.X. characterization thermochemistry Synthesis, and of vol. , pp.