Title:
METHOD FOR PRODUCING TANTALUM OXIDE AND/OR NIOBIUM OXIDE IN FORM OF HOLLOW PARTICLE
Document Type and Number:
WIPO Patent Application WO/2005/087668
Kind Code:
A1
Abstract:
Disclosed is a method for producing tantalum oxide and/or niobium oxide in the form of hollow particles. The method is characterized in that hydrazine or an aqueous solution of hydrazine is added to (1) a solution of a tantalum compound and/or a niobium compound, (2) a solution of a fluorotantalic acid and/or a fluoroniobic acid or (3) a liquid obtained by dissolving a fluorotantalic acid crystal and/or a fluoroniobic acid crystal in water, and the thus-obtained tantalum hydroxide and/or niobium hydroxide are fired.
Inventors:
KIKUYAMA HIROHISA (JP)
WAKI MASAHIDE (JP)
HASHIGUCHI SHINJI (JP)
AOKI KENJI (JP)
WAKI MASAHIDE (JP)
HASHIGUCHI SHINJI (JP)
AOKI KENJI (JP)
Application Number:
PCT/JP2005/004367
Publication Date:
September 22, 2005
Filing Date:
March 11, 2005
Export Citation:
Assignee:
STELLA CHEMIFA CORP (JP)
KIKUYAMA HIROHISA (JP)
WAKI MASAHIDE (JP)
HASHIGUCHI SHINJI (JP)
AOKI KENJI (JP)
KIKUYAMA HIROHISA (JP)
WAKI MASAHIDE (JP)
HASHIGUCHI SHINJI (JP)
AOKI KENJI (JP)
International Classes:
C01G33/00; C01G35/00; (IPC1-7): C01G35/00; C01G33/00
Foreign References:
| JPS5983937A | 1984-05-15 | |||
| JP2004051383A | 2004-02-19 | |||
| JP2001329321A | 2001-11-27 |
Attorney, Agent or Firm:
Fukumori, Hisao (5-11 Kudanminami 4-chom, Chiyoda-ku Tokyo 74, JP)
Download PDF: