Determination of the Zinc Oxide and Boric Acid Optimum Molar Ratio on the Ultrasonic Synthesis of Zinc Borates

Authors: A. Ersan, A. S. Kipcak, M. Yildirim, A. M. Erayvaz, E. M. Derun, N. Tugrul, S. Piskin

Abstract:

Zinc borates are used as a multi-functional flame retardant additive for its high dehydration temperature. In this study, the method of ultrasonic mixing was used in the synthesis of zinc borates. The reactants of zinc oxide (ZnO) and boric acid (H3BO3) were used at the constant reaction parameters of 90°C reaction temperature and 55 min of reaction time. Several molar ratios of ZnO:H3BO3 (1:1, 1:2, 1:3, 1:4 and 1:5) were conducted for the determination of the optimum reaction ratio. Prior to synthesis the characterization of the synthesized zinc borates were made by X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FT-IR). From the results Zinc Oxide Borate Hydrate [Zn3B6O12.3.5H2O], were synthesized optimum at the molar ratio of 1:3, with a reaction efficiency of 95.2%.

Keywords: Zinc borates, ultrasonic mixing, XRD, FT-IR, reaction efficiency.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1110666

References:

[1] M. Gonen, D. Balkose, R. B. Gupta,and S. Ulku, “Supercritical carbondioxide drying of methanol zincborate mixtures”, Ind. Eng. Chem. Res.,vol. 48, pp. 6869–6876, 2009.
[2] C. Ting, D. Jian-Cheng, W. Long-Shuo, and F. Gang, “Preparation and characterization of nano-zinc borate by a new method”, J. Mater. Process. Tech.,vol. 209, pp. 4076–4079, 2009.
[3] D. Gürhan, G. Ö. Çakal, İ. Eroğlu, and S. Özkar, Kesikli reaktörde çinkoborat üretimini etkileyen parametrelerin incelenmesi, 1. National Boron Workshop Symposium Book, April 28-29, Ankara, 2005.
[4] D. Schubert, F. Alam, M. Visi and C. Knobler, “Structural characterization and chemistry of the industrially important zinc borate Zn(B3O4(OH)3)”, Chem. Mater.,vol. 15, pp. 866-871, 2002.
[5] H. E. Eltepe, D. Balköse, and S. Ülkü,“Effect of temperature and time on zinc borate species formed from zinc oxide and boric acid in aqueous medium”, Ind. Eng. Chem. Res., vol. 46, pp. 2367-2371, 2007.
[6] N. Tugrul, A.S. Kipcak, N. Baran Acarali, E. Moroydor Derun, S. Piskin, “Combined Hydrothermal Synthesis of Zinc and Magnesium Borates at 100°C using ZnO, MgO and H3BO3”, ICEBESE 2013: International Conference on Environmental, Biological and Ecological Sciences and Engineering, 26-27 September 2013, Rome, Italy.