Synthesis of Magnesium Potassium Titanate Compounds and Their Ion-Exchange Reaction

Abstract

Magnesium potassium titanates, K_0.8Mg_0.4Ti_1.6O₄ and K₂MgTi₇O₁₆, whose oxygen-site was partially substituted by fluorine, with anisotropic particle forms were synthesized via KDC (Kneading-DryingCalcination) process. Those synthesis temperatures (1000°C) fell by 200°C by use of MgF₂ as a reactant.
The former consisted of platy particles ca.50μm long and 5μm thickness. Its hydrated compound showed adsorption ability of ammonium ion by 2.2 mmol/g. The latter consisted of rod-like particles with ca.10μm length and 5 pm diameter.