CN115467048A - High-entropy rare earth niobate or tantalate ceramic fiber and preparation method thereof - Google Patents
High-entropy rare earth niobate or tantalate ceramic fiber and preparation method thereof Download PDFInfo
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- CN115467048A CN115467048A CN202211151064.2A CN202211151064A CN115467048A CN 115467048 A CN115467048 A CN 115467048A CN 202211151064 A CN202211151064 A CN 202211151064A CN 115467048 A CN115467048 A CN 115467048A
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 66
- 239000000835 fiber Substances 0.000 title claims abstract description 61
- 239000000919 ceramic Substances 0.000 title claims abstract description 52
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000009987 spinning Methods 0.000 claims abstract description 58
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 239000002243 precursor Substances 0.000 claims abstract description 16
- -1 rare earth salts Chemical class 0.000 claims abstract description 16
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 13
- 239000002904 solvent Substances 0.000 claims abstract description 12
- YHBDIEWMOMLKOO-UHFFFAOYSA-I pentachloroniobium Chemical compound Cl[Nb](Cl)(Cl)(Cl)Cl YHBDIEWMOMLKOO-UHFFFAOYSA-I 0.000 claims abstract description 8
- OEIMLTQPLAGXMX-UHFFFAOYSA-I tantalum(v) chloride Chemical compound Cl[Ta](Cl)(Cl)(Cl)Cl OEIMLTQPLAGXMX-UHFFFAOYSA-I 0.000 claims abstract description 8
- 238000009413 insulation Methods 0.000 claims abstract description 6
- 238000004321 preservation Methods 0.000 claims abstract description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 15
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052747 lanthanoid Inorganic materials 0.000 claims description 3
- 150000002602 lanthanoids Chemical class 0.000 claims description 3
- 229910052706 scandium Inorganic materials 0.000 claims description 3
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 2
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 5
- 239000006104 solid solution Substances 0.000 description 5
- 239000012071 phase Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- OBOSXEWFRARQPU-UHFFFAOYSA-N 2-n,2-n-dimethylpyridine-2,5-diamine Chemical compound CN(C)C1=CC=C(N)C=N1 OBOSXEWFRARQPU-UHFFFAOYSA-N 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- HDGGAKOVUDZYES-UHFFFAOYSA-K erbium(iii) chloride Chemical compound Cl[Er](Cl)Cl HDGGAKOVUDZYES-UHFFFAOYSA-K 0.000 description 3
- BHXBZLPMVFUQBQ-UHFFFAOYSA-K samarium(iii) chloride Chemical compound Cl[Sm](Cl)Cl BHXBZLPMVFUQBQ-UHFFFAOYSA-K 0.000 description 3
- PYOOBRULIYNHJR-UHFFFAOYSA-K trichloroholmium Chemical compound Cl[Ho](Cl)Cl PYOOBRULIYNHJR-UHFFFAOYSA-K 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- MEANOSLIBWSCIT-UHFFFAOYSA-K gadolinium trichloride Chemical compound Cl[Gd](Cl)Cl MEANOSLIBWSCIT-UHFFFAOYSA-K 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- NGDQQLAVJWUYSF-UHFFFAOYSA-N 4-methyl-2-phenyl-1,3-thiazole-5-sulfonyl chloride Chemical compound S1C(S(Cl)(=O)=O)=C(C)N=C1C1=CC=CC=C1 NGDQQLAVJWUYSF-UHFFFAOYSA-N 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001523 electrospinning Methods 0.000 description 1
- GAGGCOKRLXYWIV-UHFFFAOYSA-N europium(3+);trinitrate Chemical compound [Eu+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O GAGGCOKRLXYWIV-UHFFFAOYSA-N 0.000 description 1
- MWFSXYMZCVAQCC-UHFFFAOYSA-N gadolinium(iii) nitrate Chemical compound [Gd+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O MWFSXYMZCVAQCC-UHFFFAOYSA-N 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- WDVGLADRSBQDDY-UHFFFAOYSA-N holmium(3+);trinitrate Chemical compound [Ho+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O WDVGLADRSBQDDY-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- ATINCSYRHURBSP-UHFFFAOYSA-K neodymium(iii) chloride Chemical compound Cl[Nd](Cl)Cl ATINCSYRHURBSP-UHFFFAOYSA-K 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- YZDZYSPAJSPJQJ-UHFFFAOYSA-N samarium(3+);trinitrate Chemical compound [Sm+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O YZDZYSPAJSPJQJ-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000012720 thermal barrier coating Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Insulating Materials (AREA)
- Inorganic Fibers (AREA)
Abstract
The invention discloses a high-entropy rare earth niobate or tantalate ceramic fiber and a preparation method thereof, wherein the preparation method comprises the following steps: mixing a metal source, a spinning auxiliary agent and a spinning solvent to prepare a spinning solution, wherein the mass ratio of the metal source to the spinning auxiliary agent to the spinning solvent to the spinning auxiliary agent is 0.5-1.5; the metal source comprises at least three rare earth salts and niobium chloride, or comprises at least three rare earth salts and tantalum chloride; preparing precursor fiber from the spinning solution through electrostatic spinning, and performing high-temperature heat treatment on the precursor fiber at 900-1200 ℃, and keeping the temperature for 30-180min to obtain high-entropy rare earth niobate or tantalate ceramic fiber; the rare earth salt is hydrochloride and/or nitrate corresponding to the rare earth element. The prepared high-entropy ceramic fiber has low thermal conductivity and has wide application prospects in the fields of heat insulation, heat preservation and the like.
Description
Technical Field
The invention belongs to the technical field of high-entropy ceramic materials, and particularly relates to a high-entropy rare earth niobate or tantalate ceramic fiber and a preparation method thereof.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The high-entropy ceramic is a single-phase solid solution formed by solid-dissolving a plurality of components according to an equimolar ratio or an approximately equimolar ratio. By utilizing the four core effects (high entropy effect, slow diffusion effect, lattice distortion effect and cocktail effect) of high-entropy solid solution, the mechanical property, the electrical property, the thermal property and the like of the ceramic material can be optimized, so that the ceramic material can meet the related application requirements.
The rare earth niobate or tantalate ceramics have the characteristics of good high-temperature phase stability, low thermal conductivity, good thermal shock resistance and the like, and have wide application prospects in the fields of thermal barrier coatings, high-temperature heat prevention and insulation, heat sealing and the like. Research shows that high-entropy solid solution is introduced into the rare earth niobate or tantalate ceramic to prepare the high-entropy rare earth niobate or tantalate ceramic, so that the thermal expansion coefficient can be regulated and controlled, the phase stability is further improved, and the thermal conductivity is reduced. At present, the high-entropy rare earth niobate or tantalate ceramics are basically prepared by a method of combining solid-phase ball milling and high-temperature calcination, so that the two exist mainly in the form of powder and block. The block high-entropy ceramic has the defects of large brittleness, poor toughness and the like, and limits the application of the high-entropy rare earth niobate or tantalate ceramic.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-entropy rare earth niobate or tantalate ceramic fiber and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a preparation method of high-entropy rare earth niobate or tantalate ceramic fibers, which comprises the following steps:
mixing a metal source, a spinning auxiliary agent and a spinning solvent to prepare a spinning solution, wherein the mass ratio of the metal source to the spinning auxiliary agent to the spinning solvent to the spinning auxiliary agent is (0.5-1.5); the metal source comprises at least three rare earth salts and niobium chloride, or comprises at least three rare earth salts and tantalum chloride;
preparing precursor fiber from the spinning solution through electrostatic spinning, and carrying out high-temperature heat treatment on the precursor fiber at the temperature of 900-1200 ℃, and keeping the temperature for 30-180min to obtain the high-entropy rare earth niobate or tantalate ceramic fiber;
the rare earth salt is hydrochloride and/or nitrate corresponding to rare earth elements, and the rare earth elements are selected from scandium, yttrium and lanthanide elements.
In a second aspect, the invention provides a high-entropy rare earth niobate or tantalate ceramic fiber prepared by the preparation method.
In a third aspect, the invention provides application of the high-entropy rare earth niobate or tantalate ceramic fiber in the fields of heat insulation and heat preservation.
The benefits achieved by one or more embodiments of the invention are as follows:
(1) The high-entropy rare earth niobate or tantalate ceramic fiber is prepared for the first time, and the existing ceramic fiber system is enriched;
(2) The solid solution of the high-entropy ceramic fiber prepared by the invention has low forming temperature, single-phase high-entropy solid solution can be obtained at 900 ℃, and all elements in the ceramic fiber are uniformly distributed;
(3) The thermal conductivity of the high-entropy ceramic fiber prepared by the invention can be as low as 0.1 W.m -1 ·K -1 And has wide application prospect in the fields of heat insulation, heat preservation and the like.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is an XRD spectrum of a high-entropy rare earth niobate ceramic fiber prepared in example 1 of the present invention;
FIG. 2 is a scanning electron microscope topography of the high-entropy rare-earth niobate ceramic fibers prepared in example 1 of the present invention;
FIG. 3 is an XRD spectrum of a high entropy rare earth tantalate ceramic fiber prepared in example 2 of the present invention;
FIG. 4 is a scanning electron microscope morphology of the high-entropy rare earth tantalate ceramic fiber prepared in example 2 of the present invention.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
In a first aspect, the invention provides a preparation method of high-entropy rare earth niobate or tantalate ceramic fibers, which comprises the following steps:
mixing a metal source, a spinning auxiliary agent and a spinning solvent to prepare a spinning solution, wherein the mass ratio of the metal source to the spinning auxiliary agent to the spinning solvent to the spinning auxiliary agent is 0.5-1.5; the metal source comprises at least three rare earth salts and niobium chloride, or comprises at least three rare earth salts and tantalum chloride;
preparing precursor fiber from the spinning solution through electrostatic spinning, and carrying out high-temperature heat treatment on the precursor fiber at the temperature of 900-1200 ℃, and keeping the temperature for 30-180min to obtain the high-entropy rare earth niobate or tantalate ceramic fiber;
the rare earth salt is hydrochloride and/or nitrate corresponding to rare earth elements, and the rare earth elements are selected from scandium, yttrium and lanthanide elements.
In some embodiments, the rare earth salts and niobium chloride used to prepare the high entropy rare earth niobate ceramic fibers are according to the formula RE 3 NbO 7 Or RENbO 4 The molar ratio of each element in the formula (I) is measured, wherein each rare earth element is equal stoichiometric ratio or nearly equal stoichiometric ratio;
or, the rare earth salt and tantalum chloride adopted for preparing the high-entropy rare earth tantalate ceramic fiber are shown as the molecular formula RE 3 TaO 7 、RETaO 4 Or RETa 3 O 9 The molar ratio of each element in the formula (II) is measured, wherein each rare earth element is equal to or close to the stoichiometric ratio.
In some embodiments, the spinning aid is polyvinylpyrrolidone and/or polyethylene oxide;
the spinning solvent is a mixture of absolute ethyl alcohol and N, N-dimethylformamide, and the mass ratio of the absolute ethyl alcohol to the N, N-dimethylformamide is 1:1-1.5.
In some embodiments, the mass ratio of the metal source, the spinning solvent, and the spinning aid is 0.6-1.
In some embodiments, the electrospinning process conditions: the spinning distance is 10-25cm, the spinning voltage is 10-25kV, the spinning solution advancing speed is 0.5-3.0mL/h, the ambient temperature is 15-35 ℃, and the ambient humidity is 20-40%.
In some embodiments, the ramp rate of the high temperature heat treatment is 0.5 to 3 ℃/min, and the atmosphere of the high temperature heat treatment is an air atmosphere.
In a second aspect, the invention provides a high-entropy rare earth niobate or tantalate ceramic fiber prepared by the preparation method.
In a third aspect, the invention provides application of the high-entropy rare earth niobate or tantalate ceramic fiber in the fields of heat insulation and heat preservation.
The invention will be further explained and illustrated with reference to the following examples.
Example 1
(1) Weighing 4g of yttrium chloride, samarium chloride, gadolinium chloride, holmium chloride, erbium chloride and niobium chloride according to a molar ratio of Y to Sm to Gd to Ho to Er to Nb = 3;
(2) Preparing precursor fiber from the spinning solution prepared in the step (1) through electrostatic spinning, wherein the electrostatic spinning process conditions are as follows: the spinning distance is 15cm, the spinning voltage is 18kV, the advancing speed of the spinning solution is 1.5mL/h, the ambient temperature is 25 ℃, and the ambient humidity is 30%;
(3) Heating the precursor fiber prepared in the step (2) to 900 ℃ at the heating rate of 1 ℃/min in the air atmosphere, and preserving the heat for 30min to obtain the high entropy (Y) 0.2 Sm 0.2 Gd 0.2 Ho 0.2 Er 0.2 ) 3 NbO 7 Ceramic fibers.
The high entropy (Y) obtained in this example 0.2 Sm 0.2 Gd 0.2 Ho 0.2 Er 0.2 ) 3 NbO 7 Pressing the ceramic fiber into a block sample, and testing the thermal conductivity of the block sample by adopting Hot-Disk to be 0.099 W.m -1 ·K -1 。
Example 2
(1) Weighing 4g of yttrium chloride, samarium chloride, gadolinium chloride, holmium chloride, erbium chloride and tantalum chloride according to a molar ratio of Y to Sm to Gd to Ho to Er to Ta = 3;
(2) Preparing precursor fiber from the spinning solution prepared in the step (1) through electrostatic spinning, wherein the electrostatic spinning process conditions are as follows: the spinning distance is 15cm, the spinning voltage is 18kV, the advancing speed of the spinning solution is 1.5mL/h, the ambient temperature is 25 ℃, and the ambient humidity is 30%;
(3) Heating the precursor fiber prepared in the step (2) to 900 ℃ at the heating rate of 1 ℃/min in the air atmosphere, and preserving the heat for 30min to obtain the high entropy (Y) 0.2 Sm 0.2 Gd 0.2 Ho 0.2 Er 0.2 ) 3 TaO 7 Ceramic fibers.
The high entropy (Y) obtained in this example 0.2 Sm 0.2 Gd 0.2 Ho 0.2 Er 0.2 ) 3 TaO 7 Pressing the ceramic fiber into a block sample, and testing the thermal conductivity of the block sample by adopting Hot-Disk to be 0.1 W.m -1 ·K -1 。
Example 3
(1) Weighing 4g of yttrium nitrate, samarium nitrate, europium nitrate, gadolinium nitrate, holmium nitrate and niobium chloride according to the element molar ratio Y: sm: eu: gd: ho: nb = 1;
(2) Preparing precursor fiber from the spinning solution prepared in the step (1) through electrostatic spinning, wherein the electrostatic spinning process conditions are as follows: the spinning distance is 16cm, the spinning voltage is 20kV, the advancing speed of the spinning solution is 1.2mL/h, the ambient temperature is 25 ℃, and the ambient humidity is 30%;
(3) Heating the precursor fiber prepared in the step (2) in the air atmosphere at the heating rate of 2 ℃/minKeeping the temperature for 1h to 950 ℃ to obtain high entropy (Y) 0.2 Sm 0.2 Eu 0.2 Gd 0.2 Ho 0.2 )NbO 4 Ceramic fibers.
Example 4
(1) Weighing 4g of yttrium chloride, neodymium chloride, samarium chloride, holmium chloride, erbium chloride and tantalum chloride according to the element molar ratio Y to Nd to Sm to Ho to Er to Ta = 1;
(2) Preparing precursor fiber from the spinning solution prepared in the step (1) through electrostatic spinning, wherein the electrostatic spinning process conditions are as follows: the spinning distance is 14cm, the spinning voltage is 18kV, the advancing speed of the spinning solution is 1.5mL/h, the ambient temperature is 25 ℃, and the ambient humidity is 30%;
(3) Heating the precursor fiber prepared in the step (2) to 1000 ℃ at the heating rate of 1 ℃/min in the air atmosphere, and preserving the heat for 30min to obtain the high entropy (Y) 0.2 Nd 0.2 Sm 0.2 Ho 0.2 Er 0.2 )TaO 4 Ceramic fibers.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A preparation method of high-entropy rare earth niobate or tantalate ceramic fiber is characterized by comprising the following steps: the method comprises the following steps:
mixing a metal source, a spinning auxiliary agent and a spinning solvent to prepare a spinning solution, wherein the mass ratio of the metal source to the spinning auxiliary agent to the spinning solvent to the spinning auxiliary agent is 0.5-1.5; the metal source comprises at least three rare earth salts and niobium chloride, or comprises at least three rare earth salts and tantalum chloride;
preparing precursor fiber from the spinning solution through electrostatic spinning, and carrying out high-temperature heat treatment on the precursor fiber at the temperature of 900-1200 ℃, and keeping the temperature for 30-180min to obtain the high-entropy rare earth niobate or tantalate ceramic fiber;
the rare earth salt is hydrochloride and/or nitrate corresponding to rare earth elements, and the rare earth elements are selected from scandium, yttrium and lanthanide elements.
2. The method for preparing high-entropy rare earth niobate or tantalate ceramic fibers according to claim 1, wherein: rare earth salt and niobium chloride adopted for preparing high-entropy rare earth niobate ceramic fiber are shown as molecular formula RE 3 NbO 7 Or RENbO 4 The molar ratio of each element in the formula (II) is measured, wherein each rare earth element is equal to or close to the stoichiometric ratio.
3. The method for preparing high-entropy rare earth niobate or tantalate ceramic fibers according to claim 1, wherein: rare earth salt and tantalum chloride adopted for preparing high-entropy rare earth tantalate ceramic fiber are shown as molecular formula RE 3 TaO 7 、RETaO 4 Or RETa 3 O 9 The molar ratio of each element in the formula (II) is measured, wherein each rare earth element is equal to or close to the stoichiometric ratio.
4. A method for preparing high-entropy rare-earth niobate or tantalate ceramic fibers according to claim 1, wherein: the spinning auxiliary agent is polyvinylpyrrolidone and/or polyethylene oxide.
5. The method for preparing high-entropy rare earth niobate or tantalate ceramic fibers according to claim 1, wherein: the spinning solvent is a mixture of absolute ethyl alcohol and N, N-dimethylformamide, and the mass ratio of the absolute ethyl alcohol to the N, N-dimethylformamide is 1:1-1.5.
6. A method for preparing high-entropy rare-earth niobate or tantalate ceramic fibers according to claim 1, wherein: the mass ratio of the metal source to the spinning solvent to the spinning auxiliary agent is 0.6-1.
7. The method for preparing high-entropy rare earth niobate or tantalate ceramic fibers according to claim 1, wherein: the electrostatic spinning process conditions are as follows: the spinning distance is 10-25cm, the spinning voltage is 10-25kV, the spinning solution advancing speed is 0.5-3.0mL/h, the ambient temperature is 15-35 ℃, and the ambient humidity is 20-40%.
8. The method for preparing high-entropy rare earth niobate or tantalate ceramic fibers according to claim 1, wherein: the temperature rise rate of the high-temperature heat treatment is 0.5-3 ℃/min, and the atmosphere of the high-temperature heat treatment is air atmosphere.
9. A high-entropy rare earth niobate or tantalate ceramic fiber is characterized in that: prepared by the preparation method of any one of claims 1 to 8.
10. Use of the high entropy rare earth niobate or tantalate ceramic fiber of claim 9 in the field of thermal insulation and preservation.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110698201A (en) * | 2019-11-05 | 2020-01-17 | 湘潭大学 | Ceramic and preparation method thereof |
| CN111592358A (en) * | 2020-04-09 | 2020-08-28 | 中国科学院化学研究所 | Carbide high-entropy ceramic fiber and preparation method thereof |
| CN113135755A (en) * | 2021-04-14 | 2021-07-20 | 厦门稀土材料研究所 | Flexible cerium acid rare earth high-entropy nanofiber ceramic membrane and preparation method and application thereof |
| CN114751737A (en) * | 2021-08-19 | 2022-07-15 | 厦门稀土材料研究所 | Zirconic acid rare earth-based high-entropy ceramic nanofiber and preparation method and application thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110698201A (en) * | 2019-11-05 | 2020-01-17 | 湘潭大学 | Ceramic and preparation method thereof |
| CN111592358A (en) * | 2020-04-09 | 2020-08-28 | 中国科学院化学研究所 | Carbide high-entropy ceramic fiber and preparation method thereof |
| CN113135755A (en) * | 2021-04-14 | 2021-07-20 | 厦门稀土材料研究所 | Flexible cerium acid rare earth high-entropy nanofiber ceramic membrane and preparation method and application thereof |
| CN114751737A (en) * | 2021-08-19 | 2022-07-15 | 厦门稀土材料研究所 | Zirconic acid rare earth-based high-entropy ceramic nanofiber and preparation method and application thereof |
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