| 摘要 |
A process for the production of a glass or ceramic article comprising a vapour phase oxidation wherein vaporized compounds are oxidized to form particulate oxide soot which is captured and consolidated to a unitary article by sintering, characterised in that at least one of the compounas is a beta -diketonate complex of a metal selected from Groups IA, IB, IIA, IIB, IIIA, IIIB, IVA, IVB and the rare earth series of the Periodic Table is disclosed. …<??>A process for the production of a glass optical waveguide comprising a vapour phase oxidation wherein compounds of selected metals are vaporized, the vapours are transported to an oxidation site, the vapours are oxidized at the site to form particulate metal oxide soot, the soot is captured and consolidated into clear glass and the glass is drawn into optical waveguide fibre, characterised in that at least one of the compounds is a beta -diketonate complex of a metal selected from Groups IA, IB, IIA, IIB, IIIA, IIIB, IVA, IVB and the rare earth series of the Periodic Table is also disclosed. …<??>The present invention offers advantages over the prior art. |
