CN106006700A - 一种制备1~2μm氧化镥铈共沉物的方法 - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 title abstract 5
- 239000000126 substance Substances 0.000 title abstract 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 16
- VBIXEXWLHSRNKB-UHFFFAOYSA-N ammonium oxalate Chemical compound [NH4+].[NH4+].[O-]C(=O)C([O-])=O VBIXEXWLHSRNKB-UHFFFAOYSA-N 0.000 claims abstract description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001556 precipitation Methods 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 30
- 229910052684 Cerium Inorganic materials 0.000 claims description 22
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 22
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 13
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 7
- 229910021529 ammonia Inorganic materials 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000010413 mother solution Substances 0.000 claims description 3
- 150000003891 oxalate salts Chemical class 0.000 claims description 3
- 235000006408 oxalic acid Nutrition 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000002242 deionisation method Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 238000005304 joining Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 abstract description 3
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 3
- 150000002910 rare earth metals Chemical class 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract 1
- 239000000908 ammonium hydroxide Substances 0.000 abstract 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 abstract 1
- 238000010304 firing Methods 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 8
- 239000000843 powder Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- VYLVYHXQOHJDJL-UHFFFAOYSA-K cerium trichloride Chemical compound Cl[Ce](Cl)Cl VYLVYHXQOHJDJL-UHFFFAOYSA-K 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical compound [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
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- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F17/00—Compounds of rare earth metals
- C01F17/20—Compounds containing only rare earth metals as the metal element
- C01F17/206—Compounds containing only rare earth metals as the metal element oxide or hydroxide being the only anion
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- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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Abstract
本发明公开一种制备1~2μm氧化镥铈共沉物的方法,先将氧化镥和氧化铈溶于盐酸配成混合氯化物溶液,滴加氨水调节混合氯化物溶液pH值为4.0±0.2;然后将混合氯化物溶液加入草酸铵溶液进行沉淀反应,反应完后,立即过滤洗涤,灼烧,保温,冷却至室温,得到氧化镥铈共沉物。本发明的方法生产过程容易控制,氧化镥铈共沉物粒度分布均匀,又能使非稀土杂质和D50值适宜。
Description
技术领域
本发明涉及一种制备 1~2 μm 氧化镥铈共沉物的方法。
背景技术
发光二极管(LED)作为能够替代传统荧光灯和白炽灯的新一代光源,具有节能、污染小、寿命长等优点。LuAG∶Ce 荧光粉由于良好的物理性能成为 LED黄光荧光粉的首选。
LuAG∶Ce 荧光粉通过将氧化铝、氧化镥和氧化铈按一定比例混合、烧结等工艺制备而成,这些氧化物粉体的大小分别影响其混合的均匀度及之后的烧结过程。氧化镥铈粉体的制备能改变氧化铈与氧化镥粉体大小不均一的现状,而控制在 1~2 μm 又能使其与氧化铝大小较为接近,混合更为均匀,对制备高性能的 LuAG∶Ce 荧光粉粉体大有裨益。
发明内容
本发明的目的是提供一种制备 1~2 μm 氧化镥铈共沉物的方法,生产过程容易控制,氧化镥铈共沉物粒度分布均匀,又能使非稀土杂质和 D50 值适宜。
为了达成上述目的,本发明的解决方案是:
一种制备 1~2 μm 氧化镥铈共沉物的方法,先将氧化镥和氧化铈按一定重量比(这个重量比不是固定的,是根据要生成的氧化镥铈共沉物的比例要求来定)溶于盐酸配成混合氯化物溶液,滴加氨水调节混合氯化物溶液 pH 值为 4.0±0.2;然后将混合氯化物溶液加入草酸铵溶液进行沉淀反应,反应完后,立即过滤洗涤,灼烧,保温,冷却至室温,得到氧化镥铈共沉物。
所述混合氯化物溶液配制是:氧化镥和氧化铈按一定重量混合,溶于浓度为 5.5 mol/L的盐酸中配制成浓度 1.5±0.1 mol/L 的混合氯化物溶液。
所述氧化镥和氧化铈的重量百分比为:氧化镥 93.4~96.5%;氧化铈 3.5~6.6%。
所述草酸铵溶液配制是:将固体草酸配制成浓度为 32±1 g/L 的溶液,加入适量重量比 25~28% 的氨水调节成草酸铵溶液 pH 值为 7.0±0.2。
所述沉淀反应为反沉,即在室温下,在反应器中加入草酸铵溶液,开启搅拌,将混合氯化物溶液(氯化镥铈)以一定的速度加入进行反应,时间为 12~15 分钟(此加入时间限制了加入速度)。
所述沉淀反应完成后,迅速抽干母液,加去离子水洗 5~8 遍,抽干,无水乙醇洗涤 1~2 遍,抽干。
所述沉淀反应得到的草酸盐在马弗炉中进行灼烧,温度为 800~950℃,保温 1~3小时,冷却后即得到所需的 1~2 μm 的氧化镥铈共沉物。
采用上述方案后,本发明的方法生产过程容易控制,氧化镥铈共沉物粒度分布均匀,非稀土杂质少, D50 值能够控制 1~2 μm 的范围内,适用于高质量 LuAG∶Ce 荧光粉的生产。
附图说明
图 1 是实施例 1 得到的氧化镥铈 SEM 图;
图 2 是实施例 2 得到的氧化镥铈 SEM 图。
具体实施方式
配合SEM电镜图1 和图2 所示,本发明实施例具体制备如下:
a、氯化镥铈的配制。将氧化镥和氧化铈按实际产品要求的配比(实施例 1 中氧化镥∶氧化铈 = 93.4 wt%∶6.6 wt%;实施例 2 中氧化镥∶氧化铈 = 95.5 wt%∶ 4.5 wt% ),用 5.5 mol/L盐酸溶解,滴加适量 25~28% 的氨水调节pH 值约为 4.0,然后加适量的去离子水调节溶液浓度为 1.5 mol/L。
b、草酸铵溶液的配制。将无水草酸加去离子水配制成草酸溶液,滴加 25~28% 的氨水调节 pH 值约为 7.0,然后加适量的去离子水调节草酸铵溶液浓度为 3 2g/L。
c、水浴 27~28 ℃ 下,量取 3.6 L 草酸铵溶液于 5 L 烧杯中。
d、开启搅拌,转速 320 r/min。
e、开启蠕动泵,参数为:流速 10 ml/min,时间 15 min。将混合氯化物溶液滴加入草酸铵溶液中。
f、滴加完成后,立刻将沉淀倒入布氏漏斗中,沉淀完全后搅拌 3 min,出料至过滤槽。
g、迅速抽干母液,加水洗涤 6 遍,抽滤。
h、再加无水乙醇洗涤 2 遍,抽滤。
i、将得到的草酸盐通过电窑进行灼烧,得到所需的 1~2 μm 的氧化镥铈共沉物(实施例1:D50 = 1.42 μm、Fe2O3
= 1.6 ppm、SiO2 = 14 ppm、Al2O3 = 0.9 ppm。实施例2:D50 = 1.57 μm、Fe2O3
= 1.9 ppm、SiO2 = 12 ppm、Al2O3 = 0.8 ppm)。
Claims (7)
1.一种制备
1~2 μm 氧化镥铈共沉物的方法,其特征在于:先将氧化镥和氧化铈溶于盐酸配成混合氯化物溶液,滴加氨水调节混合氯化物溶液 pH 值为 4.0±0.2;然后将混合氯化物溶液加入草酸铵溶液进行沉淀反应,反应完后,立即过滤洗涤,灼烧,保温,冷却至室温,得到氧化镥铈共沉物。
2.如权利要求 1 所述的一种制备 1~2 μm 氧化镥铈共沉物的方法,其特征在于:所述混合氯化物溶液配制是:氧化镥和氧化铈溶于浓度为 5.5 mol/L的盐酸中配制成浓度 1.5±0.1 mol/L 的混合氯化物溶液。
3.如权利要求2所述的一种制备 1~2 μm 氧化镥铈共沉物的方法,其特征在于:所述氧化镥和氧化铈的重量比为:氧化镥 93.4~96.5%;氧化铈 3.5~6.6%。
4.如权利要求 1 所述的一种制备 1~2 μm 氧化镥铈共沉物的方法,其特征在于:所述草酸铵溶液配制是:将固体草酸配制成浓度为 32±1 g/L 的溶液,加入重量比 25~28% 的氨水调节成草酸铵溶液 pH 值为 7.0±0.2。
5.如权利要求 1 所述的一种制备 1~2 μm 氧化镥铈共沉物的方法,其特征在于:所述沉淀反应为反沉,即在室温下,在反应器中加入草酸铵溶液,开启搅拌,将混合氯化物溶液加入进行反应,加入时间为 12~15 分钟。
6.如权利要求 1 所述的一种制备 1~2 μm 氧化镥铈共沉物的方法,其特征在于:所述沉淀反应完成后,迅速抽干母液,加去离子水洗 5~8 遍,抽干,无水乙醇洗涤 1~2 遍,抽干。
7.如权利要求
6 所述的一种制备 1~2 μm 氧化镥铈共沉物的方法,其特征在于:所述沉淀反应得到的草酸盐在马弗炉中进行灼烧,温度为 800~950 ℃,保温 1~3 小时,冷却后即得到所需的
1~2 μm 的氧化镥铈共沉物。
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CN111977680A (zh) * | 2020-09-10 | 2020-11-24 | 中国科学院长春应用化学研究所 | 一种闪烁晶体用氧化钇镥铈的制备方法 |
CN112479243A (zh) * | 2020-12-17 | 2021-03-12 | 常州市卓群纳米新材料有限公司 | 纳米氧化镥二次分散制备大比表面积氧化镥的方法 |
CN115845877A (zh) * | 2022-10-20 | 2023-03-28 | 厦门稀土材料研究所 | 光催化剂、制备方法及应用 |
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孙明涛等: ""草酸共沉淀制备超细Ce0.8 Sm0.2O1.9工艺优化"", 《稀土》 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111977680A (zh) * | 2020-09-10 | 2020-11-24 | 中国科学院长春应用化学研究所 | 一种闪烁晶体用氧化钇镥铈的制备方法 |
CN111977680B (zh) * | 2020-09-10 | 2021-11-12 | 中国科学院长春应用化学研究所 | 一种闪烁晶体用氧化钇镥铈的制备方法 |
CN112479243A (zh) * | 2020-12-17 | 2021-03-12 | 常州市卓群纳米新材料有限公司 | 纳米氧化镥二次分散制备大比表面积氧化镥的方法 |
CN115845877A (zh) * | 2022-10-20 | 2023-03-28 | 厦门稀土材料研究所 | 光催化剂、制备方法及应用 |
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