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1.发明授权Method of preparing a zirconium oxide that is crystallized mostly or completely in cubic form 失效制备氧化锆的方法，其大多数或完全在CUBIC形式中结晶
公开(公告)号：US3849532A
公开(公告)日：1974-11-19
申请号：US22240572
申请日：1972-01-31
Applicant: DYNAMIT NOBEL AG
Inventor： DENEKE K , FALKENHAIN W , HACK P
CPC classification number: C04B35/48 , C01G25/02 , C01P2004/61 , C01P2006/32 , C01P2006/80 , C04B35/50
Abstract: 1. A PROCESS FOR CONVERING MONOCLINIC ZIRCONIUM OXIDE TO CUBIC ZIRCONIUM OXIDE, WHICH MONOLINIC ZIICONIUM OXIDE HAS BEEN OBTAINED BY THE FLOTATION SEPARATION OF A ZIRCONIUM OXIDE-SILICON OXIDE MIXTURE, INCLUDING FINELY GRANULATING THE ZIRCONIUM OXIDE RECOVERED FROM SAID FLOTATION SEPARATION; TREATING SAID GRANULATE FROM SAID FLUORIIC ACID SOLUTION HAVING A CONCENTRATION OF BETWEEN 5 AND 10% SEPARATING THE SO-TREATED GRANULATE FROM SAID SOLUTION, MIXING SAID GRANULATE WITH AT LEAST ONE OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM, MAGNESIUM, YTTRIUM, THORIUM AND CERIUM; AND HEATING SUCH MIXTURE TO ABOUT 1,000 TO 2,000:C., WHEREBY CONVERTING SAID MONOCLINIC CRYSTAL STRUCTURE SUBSTANTIALLY TO A CUBIC CRYSTAL STRUCTURE IN THE SOLID STATE.
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