Synthesis of magnesium borates using sodium borate and magnesium sulfate

Synthesis conditions of magnesium borate compounds in aqueous medium using Na2B4O7 · 10H2O and MgSO4 · 7H2O were determined. The effects of B/Mg mole ratio, pH, reaction time and precipitation temperature on the reaction performed at 90 °C were examined. 0.04Na2O · MgO · 1.23B2O3 · 3.42H2O and 0.06Na2O · MgO · 1.65B2O3 · 3.34H2O were synthesized at optimum B/Mg mole ratios of 3.60 and 4.80 by precipitation at 5 °C and the amorphous compounds formed were identified by B, Mg, Na and XRD analyses and some physical tests.