Title:
CORE SHELL TYPE OXYGEN ABSORPTION AND EMISSION MATERIAL, MANUFACTURING METHOD THEREFOR, EXHAUST GAS PURIFICATION CATALYST USING THE SAME, AND EXHAUST GAS PURIFICATION METHOD
Document Type and Number:
Japanese Patent JP2019217464
Kind Code:
A
Abstract:
To provide an oxygen absorption and emission material capable of providing an exhaust gas purification catalyst having excellent oxygen absorption and emission performance even when exposed to a high temperature, and achieving excellent NOx purification performance.SOLUTION: A core shell type oxygen absorption and emission material having a core consisting of a ceria-zirconia-based solid-solution powder having a regular phase of at least one of a pyrochlore phase and a κ phase, and a shell arranged on at least a part of a surface of the core and consisting of alumina-based oxide containing α alumina, in which an intensity ratio between a diffraction line of 2θ=14.5° and a diffraction line of 2θ=29° calculated by an X ray diffraction pattern obtained by an X ray diffraction measurement using CuKα after heating in air at 1100°C for 5 hr. [I(14/29) value] is 2% or more, and an intensity ratio between a diffraction line of 2θ=35.2° and a diffraction line of 2θ=29° [I(35/29) value] is 0.03 to 1.2%.SELECTED DRAWING: Figure 1
More Like This:
Inventors:
KUMAGAI NAOKI
MORIKAWA AKIRA
MIURA MASAHIDE
OTA ERIKO
MORIKAWA AKIRA
MIURA MASAHIDE
OTA ERIKO
Application Number:
JP2018117274A
Publication Date:
December 26, 2019
Filing Date:
June 20, 2018
Export Citation:
Assignee:
TOYOTA CENTRAL RES & DEV
TOYOTA MOTOR CORP
TOYOTA MOTOR CORP
International Classes:
B01J23/63; B01D53/94; B01J20/06; B01J20/28; B01J20/32; B01J35/08; B01J37/04; B01J37/08; F01N3/10; F01N3/28
Domestic Patent References:
| JP2017186225A | 2017-10-12 | |||
| JP2017189756A | 2017-10-19 | |||
| JP2014534156A | 2014-12-18 |
Foreign References:
| WO2014002667A1 | 2014-01-03 |
Attorney, Agent or Firm:
Patent Business Corporation St. Crest International Patent Office