CN104211124A - Low-temperature synthetic method of La<1-x>Ca<x>MnO3 nano-powder - Google Patents
Low-temperature synthetic method of La<1-x>Ca<x>MnO3 nano-powder Download PDFInfo
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- CN104211124A CN104211124A CN201410352421.0A CN201410352421A CN104211124A CN 104211124 A CN104211124 A CN 104211124A CN 201410352421 A CN201410352421 A CN 201410352421A CN 104211124 A CN104211124 A CN 104211124A
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- 239000011858 nanopowder Substances 0.000 title claims abstract description 41
- 238000010189 synthetic method Methods 0.000 title claims abstract description 13
- 229910000473 manganese(VI) oxide Inorganic materials 0.000 title abstract 5
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 56
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000002156 mixing Methods 0.000 claims abstract description 28
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000008367 deionised water Substances 0.000 claims abstract description 14
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 14
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000001354 calcination Methods 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 13
- 229910002651 NO3 Inorganic materials 0.000 claims description 12
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 12
- 238000005245 sintering Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 13
- 238000003980 solgel method Methods 0.000 abstract description 8
- 239000000919 ceramic Substances 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000002194 synthesizing effect Effects 0.000 abstract description 2
- 239000011575 calcium Substances 0.000 abstract 4
- 239000003153 chemical reaction reagent Substances 0.000 abstract 1
- 239000002270 dispersing agent Substances 0.000 abstract 1
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 abstract 1
- 239000002105 nanoparticle Substances 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 8
- 238000003786 synthesis reaction Methods 0.000 description 8
- 239000011572 manganese Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000003760 magnetic stirring Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000010532 solid phase synthesis reaction Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000975 co-precipitation Methods 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003352 sequestering agent Substances 0.000 description 2
- 239000013077 target material Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 238000003835 carbonate co-precipitation Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- PPNAOCWZXJOHFK-UHFFFAOYSA-N manganese(2+);oxygen(2-) Chemical class [O-2].[Mn+2] PPNAOCWZXJOHFK-UHFFFAOYSA-N 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention discloses a low-temperature synthetic method of a La<1-x>Ca<x>MnO3 nano-powder and belongs to the field of electronic ceramics. The method includes following steps: dissolving lanthanum nitrate, calcium nitrate and manganese nitrate in deionized water to obtain a solution; adding the solution in deionized water in which citric acid is dissolved; performing a heating and stirring operation on a magnetic stirrer until a gel is formed with ethylene glycol as a dispersing agent; drying the gel in a drying box to form a dried gel; and then calcining the dried gel in a box-type furnace at a temperature of 550-700 DEG C to obtaining the La<1-x>Ca<x>MnO3 nano-powder. The La<1-x>Ca<x>MnO3 nano-powder is uniform in nano-particle sizes. In the invention, by means of a sol-gel method, a molecular-grade mixing process of the components is ensured and conditions for synthesizing the La<1-x>Ca<x>MnO3 nano-powder at a low temperature are provided, thereby greatly reducing synthetic energy consumption. In addition, the method is simple in processes and is good in repeatability, and the employed chemical reagents are low in cost and are easy to obtain.
Description
Technical field
The present invention relates to a kind of La
1-xca
xmnO
3the low-temperature synthetic method of nano-powder, belongs to electronic ceramic fields.
Background technology
Perovskite type manganese oxide class material is one of strong associated material study hotspot in recent decades.It is at Curie temperature
t csuper magneto-resistance effect (CMR) and the metal-insulator transition behavior of neighbouring appearance make it be with a wide range of applications in fields such as magnetic memory device, temperature sensor, photoelectric detectors, have attracted the large quantifier elimination interest of people.La
1-xca
xmnO
3system as one of super giant magnetic resistance important branch owing to there is when Ca content is in (0 ~ 0.5) higher metal-insulator transition temperature (x ≈ 0.3,270K) and very large temperature coefficient of resistance (>5%) and receive much concern simultaneously.
About La
1-xca
xmnO
3the preparation method that material powder is conventional has solid phase method, coprecipitation method and sol-gel method etc.But the sample prepared of solid phase method usually can nonstoichiometry, composition and mutually also can be uneven, the material property obtained is often not good; The properties of sample that oxalate or carbonate co-precipitation obtain is better, but also there is Ca ion and be slightly soluble in water and the problem having micro material to lose, make finally to obtain powder often nonstoichiometry ratio, and deposit seeds size is comparatively large, mutual mixing uniformity is bad.
The technology of preparing that the present invention proposes, adopts sol-gel method, overcomes the sample nonstoichiometry ratio existed in above method, and the uneven first-class problem of composition, adopts sol-gel method that each component element can be made to mix in atomic level, thus ensure that La
1-xca
xmnO
3the synthesis under cryogenic of pure phase nanometer powder, the present invention is simple to operate in addition.Although sol-gel method is more complex, can overcome the shortcoming of first two method, obtained properties of sample is best.And can very big Simplified flowsheet step by finding suitable sequestrant and optimizing colloid preparation and sintering process, reduction production cost, enhances product performance.
Although the sol-gel method sequestrant used of report is general uncommon at present, price is more expensive, and technics comparing is complicated, the Gelation Conditions of colloid is harsh, the pH value narrow range satisfied condition, and often needing the sintering through more than two to three times to synthesize desired product, the production cycle is longer, and sintering temperature is often higher.But the invention provides method, only need one-step calcination to obtain La
1-xca
xmnO
3pure phase nanometer powder.Adopt the La that solid phase method is made
1-xca
xmnO
3powder, calcining temperature is higher, and being often more than or equal to 700oC could become phase, due to the defect that solid phase method itself brings, participates in into the various oxide compounds of phase, being difficult to mix in microscopic dimensions, being difficult to obtain the La of pure phase through repeatedly sintering all the time
1-xca
xmnO
3powder, gained La
1-xca
xmnO
3powder, size is more than micron, and Elemental redistribution is uneven, is unfavorable for preparation of target materials.Adopt the La of coprecipitation method synthesis
1-xca
xmnO
3powder, comprehensive literature is reported in temperature and is more than or equal to 600oC and could becomes phase, the powder of synthesis often relatively stoichiometric ratio.
Summary of the invention
The object of the present invention is to provide a kind of La
1-xca
xmnO
3the low-temperature synthetic method of nano-powder, the present invention adopts sol-gel process to realize synthesizing La at low temperatures
1-xca
xmnO
3nano-powder (can obtain pure phase La at 550oC
1-xca
xmnO
3nano-powder), therefore greatly can reduce energy consumption, present method only needs one-step calcination can synthesize required powder in addition, without the need to repeatedly sintering, obtains powder size all at nano level, uniform particles, uniform component.
La of the present invention
1-xca
xmnO
3the low-temperature synthetic method of nano-powder, specifically comprises the following steps:
(1) lanthanum nitrate, nitrocalcite, manganous nitrate, citric acid are pressed La:Ca:Mn:C
6h
8o
7h
2the mol ratio of O is that 1-x ︰ x ︰ 1 ︰ (2 ~ 4) carries out calculating and weighing;
(2) step (1) institute is dissolved in deionized water simultaneously even by magnetic stirrer for citric acid, obtains mixing solutions;
(3) in the mixing solutions of step (2) gained, add lanthanum nitrate standby in step (1), nitrocalcite, manganous nitrate raw material successively, evenly obtain miscible fluid by magnetic stirrer simultaneously; Then in mixing solutions, add ethylene glycol do dispersion agent, wherein, the volume of ethylene glycol is 1% ~ 10% of the volume of mixing solutions;
(4) heating of step (3) gained mixture is obtained yellow gel, obtain xerogel by after gel drying;
(5) La is obtained after step (4) gained xerogel being ground to powder calcining
1-xca
xmnO
3nano-powder.
The scope of step of the present invention (1) x is 0≤x≤0.7.
Step of the present invention (2) add deionized water citric acid and mass values be 1:10 ~ 1:50.
In step of the present invention (4), the Heating temperature of mixing solutions is 80 ~ 120oC, and heating duration is 5 ~ 7h.
In step of the present invention (4), the drying temperature of gel is 90 ~ 140oC, and dry duration is 12 ~ 14h, and dry atmosphere is normal pressure, air.
In step of the present invention (5), lapping mode can be hand-ground or mechanical ball milling.
Described in step of the present invention (5), calcining temperature is 550 ~ 700oC, and calcining duration is 8 ~ 12h, and sintering atmosphere is air.
The present invention compared with prior art has following advantage:
The La that existing technology prepares
1-xca
xmnO
3powder, its imaging temperature is all more than 600oC and other.Obtained powder particle micron order and more than, granular size differs, composition heterogeneity.And the invention adopting method of the present invention to prepare adopts sol-gel method to prepare the La of Nano grade
1-xca
xmnO
3powder, has just synthesized La the extremely low of 550oC
1-xca
xmnO
3pure phase powder, its diameter of particle is at about 100nm.Quality is good, uniform particles, uniform component, and the low temperature synthesis of as a rule split, is conducive to the La improving sintering
1-xca
xmnO
3polycrystal target density, present method is that follow-up high-performance preparation of target materials lays the first stone.
Accompanying drawing explanation
Fig. 1 is embodiment 1 gained La
0.67ca
0.33mnO
3the XRD figure spectrum of nano-powder;
Fig. 2 is embodiment 2 gained LaMnO
3the XRD figure spectrum of nano-powder;
Fig. 3 is embodiment 3 gained La
0.3ca
0.7mnO
3the XRD figure spectrum of powder;
Fig. 4 is embodiment 4 gained La
0.5ca
0.5mnO
3the XRD figure spectrum of powder;
Fig. 5 is embodiment 1 gained La
0.67ca
0.33mnO
3the SEM photo of nano-powder;
Fig. 6 is embodiment 2 gained LaMnO
3the SEM photo of nano-powder;
Fig. 7 is embodiment 3 gained La
0.3ca
0.7mnO
3the SEM photo of nano-powder;
Fig. 8 is embodiment 4 gained La
0.3ca
0.7mnO
3the SEM collection of illustrative plates of powder.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described, but protection scope of the present invention is not limited to described content.
Embodiment 1
La described in the present embodiment
1-xca
xmnO
3the low-temperature synthetic method of nano-powder, specifically comprises the following steps:
(1) lanthanum nitrate, nitrocalcite, manganous nitrate, citric acid are pressed La:Ca:Mn:C
6h
8o
7h
2the mol ratio of O is that 0.67 ︰ 0.33 ︰ 1 ︰ 2 carries out calculating and weighing;
(2) be dissolved in by citric acid standby for step (1) in deionized water simultaneously even by magnetic stirrer, obtain mixing solutions, wherein, the mass values of citric acid and deionized water is 1:10;
(3) in the mixing solutions of step (2) gained, lanthanum nitrate standby in step (1), nitrocalcite, manganous nitrate raw material is added, simultaneously even by magnetic stirrer, obtain 100ml mixture; Then in mixing solutions, add 10ml ethylene glycol do dispersion agent, wherein, the volume of ethylene glycol is 10% of the volume of mixing solutions;
(4) step (3) gained mixture heating evaporation on magnetic stirring apparatus is obtained gel, wherein, Heating temperature is 80oC, and heating duration is 5h.
(5) gel is put into 140oC loft drier, after freeze-day with constant temperature 12h, obtain xerogel;
(6) put into box-type furnace after being ground by step (4) gained xerogel and obtain La after 700oC calcines 8h
0.67ca
0.33mnO
3nano-powder.
The La that the present embodiment prepares
0.67ca
0.33mnO
3the XRD figure of nano-powder is composed as shown in Figure 1, as seen from the figure, and the La of pure phase
0.67ca
0.33mnO
3nano-powder is synthesized, and peak width is comparatively large, illustrates that synthetic powder grain-size is less, is in as microcrystalline state.
The La that the present embodiment prepares
0.67ca
0.33mnO
3the SEM photo of nano-powder as shown in Figure 4, as seen from the figure, the La of synthesis
0.67ca
0.33mnO
3the mean sizes of crystal grain, at about 100nm, proves the La synthesized
0.67ca
0.33mnO
3powder is nano level.
Embodiment 2
(1) lanthanum nitrate, nitrocalcite, manganous nitrate, citric acid are pressed La:Mn:C
6h
8o
7h
2the mol ratio of O is that 1 ︰ 1 ︰ 3 carries out calculating and weighing;
(2) be dissolved in by citric acid standby for step (1) in deionized water simultaneously even by magnetic stirrer, obtain mixing solutions, wherein, the mass values of citric acid and deionized water is 1:20;
(3) in the mixing solutions of step (2) gained, lanthanum nitrate standby in step (1), nitrocalcite, manganous nitrate raw material is added, simultaneously even by magnetic stirrer, obtain 200ml mixture; Then in mixing solutions, add 10ml ethylene glycol do dispersion agent, wherein, the volume of ethylene glycol is 5% of the volume of mixing solutions;
(4) step (3) gained mixture heating evaporation on magnetic stirring apparatus is obtained gel, wherein, Heating temperature is 100oC, and heating duration is 6h.
(5) gel is put into 120oC loft drier, after freeze-day with constant temperature 13h, obtain xerogel;
(6) put into box-type furnace after being ground by step (4) gained xerogel and obtain LaMnO after 600oC calcines 10h
3nano-powder.
The LaMnO that the present embodiment prepares
3the XRD figure of nano-powder is composed as shown in Figure 2, as seen from the figure, and the LaMnO of pure phase
3nano-powder is synthesized, and peak width is comparatively large, illustrates that synthetic powder grain-size is less, is in as microcrystalline state.
The LaMnO that the present embodiment prepares
3the SEM photo of nano-powder as shown in Figure 6, as seen from the figure, the LaMnO of synthesis
3the mean sizes of crystal grain, at about 100nm, proves the LaMnO synthesized
3powder is nano level.
Embodiment 3
(1) lanthanum nitrate, nitrocalcite, manganous nitrate, citric acid are pressed La:Ca:Mn:C
6h
8o
7h
2the mol ratio of O is that 0.3 ︰ 0.7 ︰ 1 ︰ 4 carries out calculating and weighing;
(2) be dissolved in by citric acid standby for step (1) in deionized water simultaneously even by magnetic stirrer, obtain mixing solutions, wherein, the mass values of citric acid and deionized water is 1:30;
(3) in the mixing solutions of step (2) gained, lanthanum nitrate standby in step (1), nitrocalcite, manganous nitrate raw material is added, simultaneously even by magnetic stirrer, obtain 500ml mixture; Then in mixing solutions, add 5ml ethylene glycol do dispersion agent, wherein, the volume of ethylene glycol is 1% of the volume of mixing solutions;
(4) step (3) gained mixture heating evaporation on magnetic stirring apparatus is obtained gel, wherein, Heating temperature is 120oC, and heating duration is 7h.
(5) gel is put into 100oC loft drier, after freeze-day with constant temperature 14h, obtain xerogel;
(6) put into box-type furnace after being ground by step (4) gained xerogel and obtain La after 700oC calcines 12h
0. 7ca
0.3mnO
3nano-powder.
The La that the present embodiment prepares
0.7ca
0.3mnO
3the XRD figure of nano-powder is composed as shown in Figure 3, as seen from the figure, and the La of pure phase
0.7ca
0.3mnO
3nano-powder is synthesized, and peak width is comparatively large, illustrates that synthetic powder grain-size is less, is in as microcrystalline state.
The La that the present embodiment prepares
0.7ca
0.3mnO
3the SEM photo of nano-powder as shown in Figure 6, as seen from the figure, the La of synthesis
0.7ca
0.3mnO
3the mean sizes of crystal grain, at about 100nm, proves the La synthesized
0.7ca
0.3mnO
3powder is nano level.
Embodiment 4
(1) lanthanum nitrate, nitrocalcite, manganous nitrate, citric acid are pressed La:Ca:Mn:C
6h
8o
7h
2the mol ratio of O is that 0.5 ︰ 0.5 ︰ 1 ︰ 4 carries out calculating and weighing;
(2) be dissolved in by citric acid standby for step (1) in deionized water simultaneously even by magnetic stirrer, obtain mixing solutions, wherein, the mass values of citric acid and deionized water is 1:50;
(3) in the mixing solutions of step (2) gained, lanthanum nitrate standby in step (1), nitrocalcite, manganous nitrate raw material is added, simultaneously even by magnetic stirrer, obtain 500ml mixture; Then in mixing solutions, add 10ml ethylene glycol do dispersion agent, wherein, the volume of ethylene glycol is 2% of the volume of mixing solutions;
(4) step (3) gained mixture heating evaporation on magnetic stirring apparatus is obtained gel, wherein, Heating temperature is 90oC, and heating duration is 7h.
(5) gel is put into 90oC loft drier, after freeze-day with constant temperature 14h, obtain xerogel;
(6) put into box-type furnace after being ground by step (4) gained xerogel and obtain La after 650oC calcines 12h
0. 5ca
0.5mnO
3nano-powder.
The La that the present embodiment prepares
0.5ca
0.5mnO
3the XRD figure of nano-powder is composed as shown in Figure 4, as seen from the figure, and the La of pure phase
0.5ca
0.5mnO
3nano-powder is synthesized, and peak width is comparatively large, illustrates that synthetic powder grain-size is less, is in as microcrystalline state.
The La that the present embodiment prepares
0.5ca
0.5mnO
3the SEM photo of nano-powder as shown in Figure 8, as seen from the figure, the La of synthesis
0.5ca
0.5mnO
3the mean sizes of crystal grain, at about 500nm, proves the La synthesized
0.7ca
0.3mnO
3powder is nano level.
Claims (6)
1. a La
1-xca
xmnO
3the low-temperature synthetic method of nano-powder, is characterized in that, specifically comprises the following steps:
(1) lanthanum nitrate, nitrocalcite, manganous nitrate, citric acid are pressed La:Ca:Mn:C
6h
8o
7h
2the mol ratio of O is that 1-x ︰ x ︰ 1 ︰ (2 ~ 4) carries out calculating and weighing;
(2) step (1) institute is dissolved in deionized water simultaneously even by magnetic stirrer for citric acid, obtains mixing solutions;
(3) in the mixing solutions of step (2) gained, add lanthanum nitrate standby in step (1), nitrocalcite, manganous nitrate raw material successively, evenly obtain miscible fluid by magnetic stirrer simultaneously; Then in mixing solutions, add ethylene glycol do dispersion agent, wherein, the volume of ethylene glycol is 1% ~ 10% of the volume of mixing solutions;
(4) heating of step (3) gained mixture is obtained yellow gel, obtain xerogel by after gel drying;
(5) La is obtained after step (4) gained xerogel being ground to powder calcining
1-xca
xmnO
3nano-powder.
2. La according to claim 1
1-xca
xmnO
3the low-temperature synthetic method of nano-powder, is characterized in that: the scope of described step (1) x is 0≤x≤0.7.
3. La according to claim 1
1-xca
xmnO
3the low-temperature synthetic method of nano-powder, is characterized in that: described step (2) add citric acid and deionized water mass values be 1:10 ~ 1:50.
4. La according to claim 1
1-xca
xmnO
3the low-temperature synthetic method of nano-powder, is characterized in that: in described step (4), the Heating temperature of mixing solutions is 80 ~ 120oC, and heating duration is 5 ~ 7h.
5. La according to claim 1
1-xca
xmnO
3the low-temperature synthetic method of nano-powder, is characterized in that: in described step (4), the drying temperature of gel is 90 ~ 140oC, and dry duration is 12 ~ 14h, and dry atmosphere is normal pressure, air.
6. La according to claim 1
1-xca
xmnO
3the low-temperature synthetic method of nano-powder, is characterized in that: described in step (5), calcining temperature is 550 ~ 700oC, and calcining duration is 8 ~ 12h, and sintering atmosphere is air.
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| CN106565242A (en) * | 2016-11-15 | 2017-04-19 | 昆明理工大学 | Method for improving electrical performance of lanthanum-calcium-manganese-oxygen (LCMO) ceramic material |
| CN111646798A (en) * | 2020-06-11 | 2020-09-11 | 昆明理工大学 | Preparation method of lanthanum calcium manganese oxygen low-doped samarium nitrate |
| CN115845791A (en) * | 2023-02-20 | 2023-03-28 | 农业农村部环境保护科研监测所 | Preparation method and application of Ca/La-based perovskite adsorption material |
| CN117142856A (en) * | 2023-09-12 | 2023-12-01 | 昆明理工大学 | Nickel-doped lanthanum calcium manganese oxygen polycrystalline ceramic target material |
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| CN106565242A (en) * | 2016-11-15 | 2017-04-19 | 昆明理工大学 | Method for improving electrical performance of lanthanum-calcium-manganese-oxygen (LCMO) ceramic material |
| CN106565242B (en) * | 2016-11-15 | 2019-12-03 | 昆明理工大学 | A method of improving lanthanum calcium manganese oxygen ceramic material electric property |
| CN111646798A (en) * | 2020-06-11 | 2020-09-11 | 昆明理工大学 | Preparation method of lanthanum calcium manganese oxygen low-doped samarium nitrate |
| CN115845791A (en) * | 2023-02-20 | 2023-03-28 | 农业农村部环境保护科研监测所 | Preparation method and application of Ca/La-based perovskite adsorption material |
| CN117142856A (en) * | 2023-09-12 | 2023-12-01 | 昆明理工大学 | Nickel-doped lanthanum calcium manganese oxygen polycrystalline ceramic target material |
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