Procedure for Production of Complex Lead Perovskites
| Publication Number: | SI21797A |
| Application Date: | 12. 5. 2004 |
| Assignee/Applicant: | Jožef Stefan Institute [SI] |
| Inventor: | Andrej Degen, Silvo Drnovšek, Janez Holc, Marija Kosec, Barbara Malič |
| Title: | Postopek za proizvodnjo kompleksnih svinčevih perovskitov [SL], Procedure for Production of Complex Lead Perovskites [EN] |
| Description: | The subject of invention is the preparation of powders of complex lead perovskites from metal oxides or other compounds in water suspensions under pH value control or by addition of a flocculant to a suspension and firing of a dried-out suspension. The procedure for production of complex lead perovskites according to the invention is characterised in the case of synthesis of PMN (lead magnesium niobate Pb(Mg1/3Nb2/3)O3) or PMN-PT (lead magnesium niobate – lead titanate PbTiO3) in that pH of water suspension of mixture of powders PbO, Nb2O5 and Mg2(OH)2CO3 or PbO, Nb2O5, Mg2(OH)2CO3 and TiO2 is between 10,0 and 12,5 and in that from 1 up to 70 mass % of solid material are dispersed and in that the suspension is dried out after grinding or in that 0,1 to 0,5 weight % of a polyacrylamide flocculant is added to the mixture of powders PbO, Nb2O5 and Mg2(OH)2CO3 or PbO, Nb2O5, Mg2(OH)2CO3 and TiO2 and in that from 1 up to 70 mass % of solid material are dispersed and in that the suspension is dried out after grinding and in that the dried-out powder is fired on air at a temperature between 800 degrees and 900 degrees Celsius to obtain a PMN and a PMN-PT perovskite phase which is then ground again and sintered at the temperature of 1200 degrees Celsius. |
| Drawings: | / |
| Category: | Nanotechnology and New Materials |
| Technology application codes: | Industrial manufacturing, material and transport |
| Market application codes: | Industrial products, Other |
| www: | https://worldwide.espacenet.com/patent/search/family/035745009/publication/SI21797A?q=si21797 |
| Patent offices: | UIL RS |