| 摘要 |
2.1 Substantial disadvantages of previously practised processes for the preparation of zirconium dioxide powder are the use of aqueous solutions and the separating-off of precipitates. In addition, the process products often do not show the desired flow, compacting and sintering properties, due to the lack of microcrystallinity. …<??>2.2 A stabilised or unstabilised zirconium dioxide powder having good properties can be prepared without using the disadvantageous process measures by melting zirconyl chloride, if desired, together with a stabiliser, or the precursor of a stabiliser, in the presence of a diol of the general formula HO - X - OH, in which X represents a saturated hydrocarbon radical having 2 to 5 carbon atoms, evaporation of water and hydrogen chloride, calcining of the reaction product at elevated temperature in an oxygen-containing gas and, if desired, milling of the calcined residue. …<??>2.3 The stabilised or unstabilised zirconium dioxide powder is suitable for the production of sintered articles which can be exposed to high mechanical and/or thermal stress. |
