Procedure for Production of High-Density KNN (K0.5Na0.5NbO3) Ceramics

Publication Number: SI21798A
Application Date: 12. 5. 2004
Assignee/Applicant: Jožef Stefan Institute [SI]
Inventor: Janez Bernard, Janez Holc, Marija Kosec, Barbara Malič
Title: Postopek za proizvodnjo KNN (K0.5Na0.5NbO3) keramike visoke gostote [SL], Procedure for Production of High-Density KNN (K0.5Na0.5NbO3) Ceramics [EN]
Description: The subject of invention is the preparation of high-density potassium sodium niobate ceramics (K0.5Na0.5NbO3) from the double salt potas-sium sodium tartrate hydrate and niobium oxide by firing. Niobium oxide (Nb2O5) and potassium sodium tartrate hydrate (KNaC4H4O6x4H2O) are mixed in the molar ratio 1:1, the mixture with acetone is wet ground for 4 – 6 hours, the suspension is dried out and calcined by firing at a temperature from 650 up to 850 degrees Celsius for 1 to 8 hours, the powder is wet ground with acetone again for 4 to 6 hours down to the particle size of 0,5 to 1 micrometer and dried out, pressed into shapes at a pressure from 50 to 500 MPa and sintered for 1 to 4 hours at 1115 to 1125 degrees Celsius.
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Category: Nanotechnology and New Materials
Technology application codes: Electronics, IT and telecoms, Industrial manufacturing, material and transport
Market application codes: Other electronics related, Industrial products
Patent offices: UIL RS