Mechanochemical Synthesis of Ternary Fluorides with Perovskite Structures

Abstract

Mechanochemical synthesis of ternary zinc fluorides, AZnF₃ (A = K, Na and NH₄) with perovskite structures was attempted by grinding equimolar mixtures of zinc fluoride (ZnF₂) and one of fluorides, i.e., potassium fluoride (KF), sodium fluoride (NaF) and ammonium fluoride (NH₄F), respectively, in air using a planetary ball mill. The grinding enables us to synthesize these compounds, and the crystallinity of them is improved as the grinding progresses. The synthesized materials formed in the ground mixtures seem to be agglomerates of fine particles having diameters of about several tens nanometer.