Production of aluminum orthophosphate and basic aluminum polyphosphate under hydrothermal conditions
Abstract
Berlinite (AlPO4) crystals, which are used in piezoelectronic devices, have been produced by hydrothermal synthesis using the methods proposed by Stanley (1954) and Kolb and Laudise (1978). Also, the possibility of AlPO4 crystallization from metastable aluminophosphate glass has been investigated. It is found that berlinite can be crystallized by slowly raising the temperature in the retrograde solubility region; the crystal growth temperature can be reduced by using metastable aluminophosphate glass. Basic aluminum polyphosphate crystals, which decompose with the formation of Al(PO3)3, have been produced and investigated.
- Publication:
-
Akademiia Nauk SSSR Doklady
- Pub Date:
- 1985
- Bibcode:
- 1985DoSSR.284..881A
- Keywords:
-
- Aluminum Compounds;
- Hydrothermal Crystal Growth;
- Phosphates;
- Metallic Glasses;
- Piezoelectric Crystals;
- Production Engineering;
- Temperature Effects;
- Solid-State Physics