YB:Y2O3 CERAMIC POWDERS

• Main Authors: BAYYA, SHYAM, S, SANGHERA, JASBINDER, S, AGGARWAL, ISHWAR, D, KIM, WOOHONG, VILLALOBOS, GUILLERMO, R
• Format: Patent
• Language: English; French
• Published: 24.06.2010
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TREATMENT OF NATURAL STONE

A high purity nano-sized Yb3+ doped Y2O3 (Yb:Y2O3) ceramic powder with a narrow size distribution and without hard agglomerates is provided. Also provided is a process for manufacturing the same wherein water in the reaction bath is replaced by a non-water washing agent having little or no hydrogen bonding capability to inhibit the formation of hard agglomerates in the ceramic powder. L'invention porte sur une poudre céramique Y2O3 (Yb:Y2O3) dopée par Yb3+, de dimension nanométrique et de grande pureté, présentant une distribution granulométrique étroite et sans agglomérats durs. L'invention porte également sur un procédé de fabrication de ladite poudre. Selon le procédé, de l'eau dans le bain de réaction est remplacée par un agent de lavage sans eau présentant une capacité faible ou nulle de formation de liaisons hydrogène pour empêcher la formation d'agglomérats durs dans la poudre céramique.