Abstract
Large single crystals of the orthorhombic phase (yellow) and the tetragonal phase (red) lead monoxide have been grown by the top-seeded solution growth method with titanium oxide as solvent. Single crystals of the lower temperature tetragonal-phase up to 100 g have been obtained from a 6% TiO 2- PbO solution. The higher temperature orthorhombic-phase crystal, as a boule of about 130 g, has been obtained by simply pulling the crystal from the melt, followed by rapid quenching through the phase transition temperature during cooling. The limiting concentration for growth of these two phases was found to be ~4–5 mole% TiO 2. Optical transmission, dielectric constant and etch pattern observation experiments have been performed on crystals of both phases.
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