Supakarn Kijamnajsuk, Paisan Setasuwan and Pathana Rakkwamsuk

pp. 1093 - 1099

Abstract

Effect of milling liquid (acetone and ethanol), and milling times on morphology of Sr₃Ti₂O₇ (ST7) crystals grow in molten potassium chloride salt at 1250°C for 4 h was investigated. Two kinds of crystals with
different morphologies were found: ST7 crystals having a tabular shape of less than 20 µm diameter and small secondary-phase crystals having high symmetry. Milling starting materials in ethanol yielded ST7 crystals that were up to 3 times thinner than those milled with acetone, increasing the (00l) Lotgering factor almost twice that when prepared with acetone. Large crystals become a bit smaller and the number of small crystals increased when the milling time increased.

Keywords

• crystal growth
• molten salt synthesis
• Sr₃Ti₂O₇
• piezoelectrics