Powder synthesis by a sol-gel emulsion process
The use of water-in-oil (w/o) emulsions was investigated for the production of freeflowing granulated ceramic powders suitable for powder processing. The size of the granulate particles was determined by the emulsion droplet size. An internal gelation process based on the decomposition of HMTA (hexamethylenetetramine (CH(2)(6)N(4)) was used to avoid the formation of hollow granules. Dense granulate particles of zirconia and alumina 0.1 to 30 micron in diameter were obtained with a variety of internal textures. Although the grains shrank on calcination, they retained their spherical shape and remained soft enough for compaction into pellet form for sintering.
Bibliographic Reference: Paper presented: Forum on New Materials, Firenze (IT), June 29 - July 4, 1994
Availability: Available from (1) as Paper EN 38217 ORA
Record Number: 199410553 / Last updated on: 1994-11-28
Original language: en
Available languages: en