Title:
希土類元素のバナジウム酸塩又はホスホバナジウム酸塩粒子のコロイド分散体
Document Type and Number:
Japanese Patent JP4017597
Kind Code:
B2
Abstract:
The invention concerns a colloidal dispersion of a vanadate or a phosphovanadate of at least a rare earth comprising either a complex-forming agent having a pK higher than 2.5, or an anion of a monovalent acid, soluble in water and having a pKa ranging between 2.5 and 5. The dispersion is obtained by contacting a colloidal dispersion or a dispersion of initial complexes comprising at least a rare earth compound and at least a complex-forming agent or an anion of said monovalent acid and whereof the pH has been adjusted to a value of at least 7, with vanadate ions, then, in adjusting the pH of the resulting medium to a value of at least 9 and heating.
Inventors:
Jean eve chanchin
Thierry Le Mercier
Thierry Le Mercier
Application Number:
JP2003526826A
Publication Date:
December 05, 2007
Filing Date:
September 10, 2002
Export Citation:
Assignee:
Rhodia Electronics and Catalysis
International Classes:
C01G31/00; C01B25/45; C09K11/77; C09K11/81; C09K11/82; C09K11/83; H05B33/14
Other References:
Arnaud Huignard,Synthesis and Luminescence Properties of Colloidal YVO4:Eu Phosphors,Chemstry of Materials,2000年,vol.12,No.4,p.1090-1094
Attorney, Agent or Firm:
Motohiro Kurauchi
Hiroshi Kazama
Endo Azusa
Takumi Yoshida
Taku Nakajima
Hiroshi Kazama
Endo Azusa
Takumi Yoshida
Taku Nakajima