PREPARATION AND THERMAL-PROPERTIES OF A LEAD INDIUM ALUMINUM PHOSPHATE-GLASS

A wet chemical process has been developed for the preparation of a lea d-indium phosphate compound, and the effect of incorporation of alumin um into the compound on the thermal properties of the resulting glass is reported. High field Al-27 NMR in combination with a magic angle sp inning technique was used to investigate the aluminum coordination in the lead-indium-aluminum phosphate glass. The transition, crystallizat ion and softening temperatures and thermal expansion coefficient of th e glass were determined by means of DTA, TMA and dilatometric measurem ents.