JP2015182932A5 - - Google Patents
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- JP2015182932A5 JP2015182932A5 JP2014062334A JP2014062334A JP2015182932A5 JP 2015182932 A5 JP2015182932 A5 JP 2015182932A5 JP 2014062334 A JP2014062334 A JP 2014062334A JP 2014062334 A JP2014062334 A JP 2014062334A JP 2015182932 A5 JP2015182932 A5 JP 2015182932A5
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- JP
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- Prior art keywords
- cerium
- zirconium
- based composite
- composite oxide
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- 229910052684 Cerium Inorganic materials 0.000 claims 7
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims 7
- -1 cerium-zirconium Chemical compound 0.000 claims 5
- 239000002131 composite material Substances 0.000 claims 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims 4
- 239000000463 material Substances 0.000 claims 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims 4
- 238000010438 heat treatment Methods 0.000 claims 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims 3
- 229910052760 oxygen Inorganic materials 0.000 claims 3
- 239000001301 oxygen Substances 0.000 claims 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims 3
- 229910052726 zirconium Inorganic materials 0.000 claims 3
- 150000001342 alkaline earth metals Chemical class 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 239000000155 melt Substances 0.000 claims 2
- GEIAQOFPUVMAGM-UHFFFAOYSA-N oxozirconium Chemical compound [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 claims 2
- 239000000843 powder Substances 0.000 claims 2
- 239000007858 starting material Substances 0.000 claims 2
- 229910020203 CeO Inorganic materials 0.000 claims 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N Neodymium Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims 1
- 229910052779 Neodymium Inorganic materials 0.000 claims 1
- 229910052777 Praseodymium Inorganic materials 0.000 claims 1
- 238000002441 X-ray diffraction Methods 0.000 claims 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims 1
- 229910052791 calcium Inorganic materials 0.000 claims 1
- 239000011575 calcium Substances 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000001816 cooling Methods 0.000 claims 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims 1
- 229910052746 lanthanum Inorganic materials 0.000 claims 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 239000011777 magnesium Substances 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims 1
- 229910052727 yttrium Inorganic materials 0.000 claims 1
Claims (4)
１０００℃〜１１００℃で３時間の熱処理後において，
（１）結晶構造はパイロクロア相を含み，
（２）Ｘ線回折法により測定したときの（１１１）面のピーク強度値をＩ１１１，（２２２）面のピーク強度値をＩ２２２として｛Ｉ１１１／（Ｉ１１１＋Ｉ２２２）｝×１００の値が１以上であり，
（３）４５０℃での酸素吸放出能が０．０１ｍｍｏｌ／ｇ以上，６００℃での酸素吸放出能が０．０５ｍｍｏｌ／ｇ以上，７５０℃での酸素吸放出能が０．３０ｍｍｏｌ／ｇ以上，
であり，
上記のセリウムを除く希土類元素及びアルカリ土類金属元素から選ばれる少なくとも１種以上の元素を，酸化物換算で０．０１〜１０ｍｏｌ％の範囲で含有することを特徴とするセリウム−ジルコニウム系複合酸化物。 A cerium-zirconium-based composite oxide comprising a) cerium, b) zirconium, and c) at least one element selected from rare earth elements and alkaline earth metal elements excluding cerium,
After heat treatment at 1000 ° C to 1100 ° C for 3 hours,
(1) The crystal structure includes a pyrochlore phase,
(2) The value of {I111 / (I111 + I222)} × 100 is 1 or more, where the peak intensity value of the (111) plane measured by the X-ray diffraction method is I111 and the peak intensity value of the (222) plane is I222. ,
(3) Oxygen storage / release capacity at 450 ° C. is 0.01 mmol / g or more, oxygen storage / release capacity at 600 ° C. is 0.05 mmol / g or more, and oxygen storage / release capacity at 750 ° C. is 0.30 mmol / g or more. ,
Der is,
Cerium characterized that you containing at least one of the elements, the range of 0.01 to 10 mol% in terms of oxide selected from rare earth elements and alkaline earth metal elements excluding the cerium - zirconium-base compound Oxide.
前記アルカリ土類金属元素がカルシウム及びマグネシウムの少なくとも一方である，請求項１に記載のセリウム−ジルコニウム系複合酸化物。 The rare earth element is at least one selected from the group of lanthanum, neodymium, praseodymium and yttrium;
The cerium-zirconium-based composite oxide according to claim 1, wherein the alkaline earth metal element is at least one of calcium and magnesium.
以下の（１）〜（５）の工程：
（１）セリウム原料と，ジルコニウム原料と，セリウムを除く希土類元素原料及びアルカリ土類金属元素原料の少なくとも一方の原料と，を含む出発原料を準備する工程１，
（２）前記出発原料を電力原単位換算で６００〜８００ｋＷｈ／ｋｇの電力量で加熱をし，次いで，電力原単位換算で８００〜１０００ｋＷｈ／ｋｇの電力量で加熱をすることにより融点以上の温度に加熱して熔融物を得る工程２，
（３）前記熔融物を徐冷却してインゴットを形成する工程３，
（４）前記インゴットを粉砕して粉体とする工程４，
（５）前記粉体を７００〜１１００℃で加熱する工程５，
を含むことを特徴とするセリウム−ジルコニウム系複合酸化物の製造方法。 A method for producing a cerium-zirconium-based composite oxide according to any one of claims 1 to 3 ,
The following steps (1) to (5):
(1) preparing a starting material comprising a cerium material, a zirconium material, and at least one of a rare earth element material and an alkaline earth metal element material excluding cerium;
(2) The starting material is heated at an electric energy of 600 to 800 kWh / kg in terms of electric power intensity, and then heated at an electric energy of 800 to 1000 kWh / kg in terms of electric power intensity, so that the temperature is higher than the melting point. Heating to obtain a melt 2,
(3) Step 3 of gradually cooling the melt to form an ingot
(4) Step 4 of pulverizing the ingot to obtain powder
(5) Step 5 of heating the powder at 700 to 1100 ° C.
A method for producing a cerium-zirconium-based composite oxide, comprising:
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014062334A JP2015182932A (en) | 2014-03-25 | 2014-03-25 | Cerium-zirconium type complex oxide and production method thereof |
| PCT/JP2014/061662 WO2015145788A1 (en) | 2014-03-25 | 2014-04-25 | Cerium-zirconium-based composite oxide and method for producing same |
| US15/125,430 US9962684B2 (en) | 2014-03-25 | 2014-04-25 | Cerium-zirconium-based composite oxide and method for producing same |
| EP14887678.2A EP3067322B1 (en) | 2014-03-25 | 2014-04-25 | Cerium-zirconium-based composite oxide and method for producing same |
| PL14887678T PL3067322T3 (en) | 2014-03-25 | 2014-04-25 | Cerium-zirconium-based composite oxide and method for producing same |
| CN201480072542.8A CN105899463B (en) | 2014-03-25 | 2014-04-25 | Cerium-zirconium system complex oxide and its manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014062334A JP2015182932A (en) | 2014-03-25 | 2014-03-25 | Cerium-zirconium type complex oxide and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2015182932A JP2015182932A (en) | 2015-10-22 |
| JP2015182932A5 true JP2015182932A5 (en) | 2016-01-28 |
Family
ID=54349886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014062334A Pending JP2015182932A (en) | 2014-03-25 | 2014-03-25 | Cerium-zirconium type complex oxide and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2015182932A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6287687B2 (en) * | 2014-08-25 | 2018-03-07 | トヨタ自動車株式会社 | Exhaust gas purification catalyst |
| JP6863799B2 (en) * | 2016-09-05 | 2021-04-21 | トヨタ自動車株式会社 | Exhaust gas purification catalyst |
| EP4066922B1 (en) * | 2019-11-28 | 2024-06-19 | Mitsui Mining & Smelting Co., Ltd. | Catalyst composition for exhaust gas purification use, and catalyst for exhaust gas purification use |
| CN116892116B (en) * | 2023-09-11 | 2023-12-01 | 镧明材料技术(上海)有限公司 | Heat accumulating and preserving powder and preparation method thereof |
| JP7522906B1 (en) | 2023-12-06 | 2024-07-25 | 第一稀元素化学工業株式会社 | Cerium oxide stabilized zirconium composition |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005231951A (en) * | 2004-02-19 | 2005-09-02 | Tosoh Corp | Multiple oxide and catalyst for purification of exhaust gas |
| EP1801074A4 (en) * | 2004-09-16 | 2010-09-08 | Daiichi Kigensokagaku Kogyo Co | Cerium-zirconium-base composite oxide, process for producing the same, oxygen storage/release material using said cerium-zirconium-base composite oxide, exhaust gas purification catalyst, and exhaust gas purification method |
| JP5127380B2 (en) * | 2007-09-27 | 2013-01-23 | 株式会社豊田中央研究所 | Ceria-zirconia composite oxide, production method thereof, and exhaust gas purification catalyst using the ceria-zirconia composite oxide |
| JP5547539B2 (en) * | 2010-04-13 | 2014-07-16 | 株式会社豊田中央研究所 | Ceria-zirconia composite oxide, production method thereof, and exhaust gas purification catalyst using the ceria-zirconia composite oxide |
| JP5533783B2 (en) * | 2011-05-19 | 2014-06-25 | トヨタ自動車株式会社 | Catalyst for exhaust gas purification of internal combustion engine |
| JP5815496B2 (en) * | 2012-12-07 | 2015-11-17 | トヨタ自動車株式会社 | Composite oxide material and exhaust gas purification catalyst using the same |
| JP5883425B2 (en) * | 2013-10-04 | 2016-03-15 | 株式会社豊田中央研究所 | Ceria-zirconia composite oxide, production method thereof, and exhaust gas purification catalyst using the ceria-zirconia composite oxide |
-
2014
- 2014-03-25 JP JP2014062334A patent/JP2015182932A/en active Pending
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