ChemInform Abstract: Cryosol Synthesis of Al2-xCrxO3 Solid Solutions.

✍ Scribed by A. A. Eliseev; A. V. Lukashin; A. A. Vertegel

• Publisher: John Wiley and Sons
• Year: 2010
• Weight: 33 KB
• Volume: 30
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.199916023

✦ Synopsis

1999 chromium, Cr chromium, Cr I 5500

16 -023

Cryosol Synthesis of Al 2-x CrxO 3 Solid Solutions.

-A novel synthesis of solid solutions of Al 2-x CrxO 3 based on a newly developed cryosol process is given. Freeze-drying of hydroxide sols formed by treatment of aqueous solutions of the element nitrates with anion exchange resin (OH --form) gives hydroxide precursors, which furnish the target solid solutions after annealing at relatively low temp. (950 • C) and times (2.5 h). The cryosol technique provides single-phase ruby powders containing ca. 7 mol.% Cr. Effects of the organization of the initial colloid system on the properties of the final solid solutions are studied. -(ELISEEV, A.