The Effect of Na, Si, and P on the Phase Composition of Zirconium and Sodium Silicophosphates (NASICON)

The effect of the excess of Na, Si, and P on the composition of Na_{1 + x}Zr₂P_{3 – x}Si_xO₁₂ (0 ≤ x ≤ 3) silicophosphates is studied; the samples are obtained by the pyrolysis of organic solutions in a rosin melt. The samples are studied by x-ray diffraction analysis, scanning electron microscopy, and the Rietveld method. It is established that specific concentrations of Na, Si, and P additives affect the impurity content in the synthesis products and change the phase composition of Na_{1 + x}Zr₂P_{3 – x}Si_xO₁₂.