Original Article |
2007, Vol.29, No.4, pp. 1093-1099
Effect of milling on morphology of molten salt synthesized Sr3Ti2O7 crystals
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.