Low-temperature synthesis of berlinite-bonded alumina ceramics.

Conference · Tue Aug 03 00:00:00 EDT 1999

OSTI ID:11185

Grover, S E

Alumina ceramics, in which berlinite (aluminum orthophosphate, AlPO{sub 4}) is the bonding phase, were synthesized at 150 C. Differential thermal analysis of a mixture of Al{sub 2}O{sub 3} and H{sub 3}PO{sub 4} solution indicated that a minimum temperature of 118 C was necessary for a chemical reaction to occur. Therefore, we hydrothermally cured a mixture of Al{sub 2}O{sub 3} and H{sub 3}PO{sub 4} solution between 130 C and 150 C to form a hard and dense berlinite-bonded alumina ceramic. The intermediate phase of aluminum phosphate hydrate (AlH{sub 3}(PO{sub 4}){sub 2}H{sub 2}O) was also identified. Physical and mechanical properties of this material are discussed.

• Research Organization: Argonne National Lab., IL (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 11185
• Report Number(s): ANL/ET/CP-97994; TRN: US0104343
• Resource Relation: Conference: 101st Annual Meeting of the American Ceramic Society, Indianapolis, IN (US), 04/25/1999--04/28/1999; Other Information: PBD: 3 Aug 1999
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ALUMINIUM OXIDES
ALUMINIUM PHOSPHATES
CERAMICS
CHEMICAL REACTIONS
DIFFERENTIAL THERMAL ANALYSIS
HYDRATES
MECHANICAL PROPERTIES
MIXTURES
SYNTHESIS
PHYSICAL PROPERTIES
WASTE FORMS