Abstract
Colloidal suspensions in insulating organic liquids have been found which produce powder patterns on polarized domains in ferroelectric crystals. Sulfur (yellow) in hexane deposits on negative dipole ends, while lead oxide (red Pb 3O 4) deposits on positive dipole ends. This technique delineates domain structures in great detail and can be used on a wide variety of ferroelectric crystals in which a domain structure has not been detected by other means. Ferroelectric crystals which have been studied by this technique include barium titanate. Rochelle salt, glycine sulfate, guanidinium aluminum sulfate hexahydrate, and numerous isomorphs. New etching techniques for barium titanate and glycine sulfate are described. Similar domain structures are revealed by etching and by powder deposit in those materials where both techniques can be used.
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