Title:
HIGHLY HEAT-RESISTANT ANATARSE-TYPE TITANIUM OXIDE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2021/117568
Kind Code:
A1
Abstract:
The purpose of the present invention is to stably retain an anatarse-type crystal phase having excellent reactivity in a temperature range of 700℃ and to provide highly heat-resistant anatarse-type titanium oxide particles which are finely particulate and have a uniform particle size distribution. The highly heat-resistant anatarse-type titanium oxide according to the present invention comprises: titanium oxide particles which contain an anatarse crystal phase at a content of 85% or more in the entire crystal phase; and a modification layer which is arranged on each of surfaces of the titanium oxide particles. The modification layer is modified with an acidic solution containing an organic acid having a molecular weight of 200 or less in an amount of 1.5×10-4 to 0.12 mol/L inclusive. The pH value of the acidic solution is 0.2 to 5.
Inventors:
CHIKAMI HIDEAKI (JP)
MIZUE KEI (JP)
MATOBA HIROKI (JP)
MIZUE KEI (JP)
MATOBA HIROKI (JP)
Application Number:
PCT/JP2020/044778
Publication Date:
June 17, 2021
Filing Date:
December 02, 2020
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
International Classes:
C01G23/053
Domestic Patent References:
| WO2008068062A1 | 2008-06-12 | |||
| WO2016002755A1 | 2016-01-07 |
Foreign References:
| JP2001206720A | 2001-07-31 | |||
| JP2003137549A | 2003-05-14 | |||
| JP2017114700A | 2017-06-29 | |||
| CN1521122A | 2004-08-18 | |||
| JP2019524631A | 2019-09-05 | |||
| JP2005068001A | 2005-03-17 | |||
| JP2019224915A | 2019-12-12 | |||
| JP2004149349A | 2004-05-27 | |||
| JP2019119630A | 2019-07-22 | |||
| JPH07267641A | 1995-10-17 | |||
| JP2013155052A | 2013-08-15 | |||
| JPS5021106B1 | 1975-07-19 |
Other References:
H. S. POTDAR. ET AL., J. AM. CERAM. SOC., vol. 79, no. 10, 1996, pages 2795
Y. IIDAS. OZAKI, J. AM. CERAM. SOC., vol. 44, 1961, pages 120
Z. WANG ET AL., J. COLLOID INTERFACE SCI., vol. 448, 2015, pages 280 - 286
See also references of EP 4074655A4
Y. IIDAS. OZAKI, J. AM. CERAM. SOC., vol. 44, 1961, pages 120
Z. WANG ET AL., J. COLLOID INTERFACE SCI., vol. 448, 2015, pages 280 - 286
See also references of EP 4074655A4
Attorney, Agent or Firm:
OIKAWA Shu et al. (JP)
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