Ceramic powder synthesis in supercritical fluids

Technical Report · Mon Apr 01 04:00:00 EST 1996

DOI:https://doi.org/10.2172/239278· OSTI ID:239278

Adkins, C L.J.; Russick, E M; Cesarano, J; Tadros, M E; Voigt, J A

Gas-phase processing plays an important role in the commercial production of a number of ceramic powders. These include titanium dioxide, carbon black, zinc oxide, and silicon dioxide. The total annual output of these materials is on the order of 2 million tons. The physical processes involved in gas-phase synthesis are typical of those involved in solution -phase synthesis: chemical reaction kinetics, mass transfer, nucleation, coagulation, and condensation. This report focuses on the work done under a Laboratory-Directed Research and Development (LDRD) project that explored the use of various high pressure techniques for ceramic powder synthesis. Under this project, two approaches were taken. First, a continuous flow, high pressure water reactor was built and studied for powder synthesis. And second, a supercritical carbon dioxide static reactor, which was used in conjunction with surfactants, was built and used to generate oxide powders.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 239278
• Report Number(s): SAND--96-0923; ON: DE96010894
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AEROSOLS
ALKOXIDES
AMMONIA
BENCH-SCALE EXPERIMENTS
CARBON DIOXIDE
CERAMICS
CHEMICAL REACTION KINETICS
CHEMICAL REACTORS
CRITICAL PRESSURE
CRITICAL TEMPERATURE
ETHANOL
MASS TRANSFER
MATERIALS WORKING
NITROUS OXIDE
NUCLEATION
POWDER METALLURGY
POWDERS
PROCESS CONTROL
PRODUCTION
SUPERCRITICAL STATE
SURFACTANTS
TEST FACILITIES
TITANIUM OXIDES
WATER