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

Youngjin PARK*, Kaoru IGARASHI and Tadao SHIMIZU

Department of Industrial Chemistry, Chiba Institute of Technology; 2-17-1 Tsudanuma, Narashino-shi 275-0016 Japan

Magnesium potassium titanates, K0.8Mg0.4Ti1.6O4 and K2MgTi7O16, whose oxygen-site was partially substituted by fluorine, with anisotropic particle forms were synthesized via KDC (Kneading-Drying-Calcination) process. Those synthesis temperatures (1000 °C) fell by 200 °C by use of MgF2 as a reactant.
The former consisted of platy particles ca. 50 μm long and 5 μm thickness. Its hydrated compound showed adsorption ability of ammonium ion by 2.2 mmol/g. The latter consisted of rod-like particles with ca. 10 μm length and 5 μm diameter.

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