Method for producing fine particles of lead zirconate
CA 1287475 C · Owner: Sony Corporation · Inventors: Tamura, Hidemasa; Uedaira, Satoru; Yamanoi, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to the synthesis of fine particles of lead zirconate which is an antiferroelectric material. The hydrolysis product of a zirconium compound or a water-soluble zirconium salt and a water-soluble lead compound are used as the starting materials. The synthesis is carried out in an aqueous solution having a pH value in the range from 13.5 to 14.4 and at a temperature of at least 175°C in such a manner as to provide for wet synthesis of fing particle of lead zirconate having an extremely small particle size and a highly uniform particle size distribution. The lead zirconate particles are synthesized as crystalline particles without the necessity of special heat …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 13, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.