Published May 1989
| Version v1
Journal article
Preparation of microspheres from an alumina-zirconia sol
Creators
- 1. Dipt. di Scienza dei Materiali ed Ingegneria Chimica, Politecnico, Torino (Italy)
- 2. Dept. de Chimie Physique des Processus Industriels, Ecole Nationale Superieure des Mines, St. Etienne (France)
Description
A sol-gel process produced microsphere of Al2O3 containing 10 wt% ZrO2 by coprecipitating Al and Zr hydroxides from the respective chlorides through the addition of NH4OH. In this paper, gel processing is examined as a function of temperature, pH, and residual Cl- content. The washed gel was peptized at 80 degrees C with HCl and the sol concentrated to an Al3+ ion content of 4 mol/L. The concentrated sol is used to feed a pilot plant for microsphere production. The microspheres calcined at 1200 degrees C are dense, with an average size of 20 μm and a BET surface area of 30 m2/g
Additional details
Publishing Information
- Journal Title
- American Ceramic Society Bulletin
- Journal Volume
- 68
- Journal Issue
- 5
- Series
- Am. Ceram. Soc. Bull.
- Journal Page Range
- 1017-1021
- ISSN
- 0002-7812
- CODEN
- ACSBA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 22011565
- Subject category
- S36: MATERIALS SCIENCE; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- ALUMINIUM OXIDES; AMMONIUM HYDROXIDES; CHEMICAL REACTION KINETICS; CHLORIDES; COPRECIPITATION; MICROSPHERES; PH VALUE; PILOT PLANTS; SOL-GEL PROCESS; TEMPERATURE DEPENDENCE; ZIRCONIUM OXIDES
- Descriptors DEC
- ALUMINIUM COMPOUNDS; AMMONIUM COMPOUNDS; CHALCOGENIDES; CHLORINE COMPOUNDS; FUNCTIONAL MODELS; HALIDES; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; HYDROXIDES; KINETICS; OXIDES; OXYGEN COMPOUNDS; PRECIPITATION; REACTION KINETICS; SEPARATION PROCESSES; TRANSITION ELEMENT COMPOUNDS; ZIRCONIUM COMPOUNDS