Effect of Magnesium Borates on the Fire-Retarding Properties of Zinc Borates

Azmi Seyhun Kipcak,Nil Baran Acarali,Sabriye Piskin,Emek Moroydor Derun,Nurcan Tugrul

doi:10.1155/2014/512164

Abstract

Magnesium borate (MB) is a technical ceramic exhibiting high heat resistance, corrosion resistance, great mechanical strength, great insulation properties, lightweightness, high strength, and a high coefficient of elasticity. Zinc borate (ZB) can be used as a multifunctional synergistic additive in addition to flame retardant additives in polymers. In this study, the raw materials of zinc oxide (ZnO), magnesium oxide (MgO), and boric acid (H3BO3) were used in the mole ratio of 1 : 1 : 9, which was obtained from preexperiments. Using the starting materials, hydrothermal synthesis was applied, and characterisation of the products was performed using X-Ray diffraction (XRD) and Fourier transform infrared (FT-IR) and Raman spectroscopies. The forms of Zn3B6O12·3.5H2O, MgO(B2O3)3·7(H2O), and Mg2(B6O7(OH)6)2·9(H2O) were synthesised successfully. Moreover, the surface morphology was investigated using scanning electron microscopy (SEM), and the B2O3content was determined. In addition, the reaction yields were calculated. The results of the B2O3content analysis were in compliance with the literature values. Examination of the SEM images indicated that the obtained nanoscale minerals had a reaction efficiency ranging between 63–74% for MB and 87–98% for ZB. Finally, the fire-retarding properties of the synthesised pure MBs, pure ZBs, and mixtures of MB and ZB were determined using differential thermal analysis and thermal gravimetry (DTA-TG) and differential scanning calorimetry (DSC).

Highlights

Magnesium borates can be used in the ceramic industry, in detergent formulations, in the production of superconducting materials, and as catalysts for the conversion of hydrocarbons due to the content of boron in the frictionreducing additives in the oils and the insulating coating compositions [1,2,3].Single-crystalline magnesium borate Mg2B2O5 nanorods have been synthesised via a simple route based on the calciantat9i0o0n∘sCofinm3ixhe.dTphoewndaenrosrcoodnsthaianviengtyMpicga(Ol dHia)m2 aentedrsHi3nBtOhe3 range of 70–120 nm and lengths up to a few micrometres [4]
The X-Ray diffraction (XRD) results for the synthesised magnesium and zinc borates are presented in Tables 2 and 3, respectively
Because at 100∘C, the expected type of zinc borate, zinc oxide borate hydrate, is obtained at 120 min of reaction time, 120 min is optimum for zinc borate; 60 min is optimum for magnesium borates

Summary

Introduction

Magnesium borates can be used in the ceramic industry, in detergent formulations, in the production of superconducting materials, and as catalysts for the conversion of hydrocarbons due to the content of boron in the frictionreducing additives in the oils and the insulating coating compositions [1,2,3]. Single-crystalline magnesium borate Mg2B2O5 nanorods have been synthesised via a simple route based on the calciantat9i0o0n∘sCofinm3ixhe.dTphoewndaenrosrcoodnsthaianviengtyMpicga(Ol dHia)m2 aentedrsHi3nBtOhe range of 70–120 nm and lengths up to a few micrometres [4]. Single-phase Mg3B2O6 and Mg2B2O5 ceramics have been synthesised from MgO and B2O3 using solid-state reaction tiinnectthhhneeiq112u205e0s0.––A1132t08t00h∘∘eCCettneemdmpopeferrtahatteuurereexrpraeanrngigmeee[a5nn]t.sd,BMManggd32BBM22OOgO65 ff(oowrrmmithss a mole ratio of 1 : 1) have been thoroughly mixed to prepare. Under the mixture of B and MgO flowing mixed was heated to. It was observed that mechanical processes were needed to form Mg-B-H [7]

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Conclusion