CN111377755A - Corrosion-resistant protective layer of crucible - Google Patents
Corrosion-resistant protective layer of crucible Download PDFInfo
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- CN111377755A CN111377755A CN202010283616.XA CN202010283616A CN111377755A CN 111377755 A CN111377755 A CN 111377755A CN 202010283616 A CN202010283616 A CN 202010283616A CN 111377755 A CN111377755 A CN 111377755A
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- crucible
- corrosion
- protective layer
- resistant protective
- kaliophilite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5046—Spinels, e.g. magnesium aluminate spinels
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
The invention discloses a corrosion-resistant protective layer of a crucible, which belongs to the technical field of lithium battery preparation and comprises the following components, by weight, 10-20% of cordierite, 15-29% of electrically-fused spinel, 5-15% of M70 mullite, 5-15% of white corundum, 5-10% of andalusite, 2-8% of kaolin, 10-30% of α -alumina, 2-20% of potash feldspar and 10-20% of kaliophilite.
Description
Technical Field
The invention belongs to the technical field of lithium battery preparation, and particularly relates to a corrosion-resistant protective layer of a crucible.
Background
The lithium battery anode material needs to be sintered in the preparation process, and a crucible is used as a container during sintering. However, the conventional crucible for sintering the lithium battery anode material is easily corroded in the firing process, and the crucible is damaged due to skin peeling after long-term use, so that the crucible cannot be used continuously. And the peeling of the crucible surface can cause slag falling and pollute the sample. The use times of the prior high-quality crucible is about 30 times, the single selling price is about 60 yuan, and the crucible is undoubtedly a large cost input for enterprises. The invention discloses a Chinese patent with application number 201810358718.6, which discloses a special high-cycle ceramic crucible special for lithium batteries and a preparation method thereof, wherein the crucible comprises a surface working layer and a substrate layer, the surface working layer comprises kaolin, white corundum, alumina micropowder, electric fused mullite, a binder, spodumene powder, cordierite and the like, the substrate layer comprises sintered mullite, kaolin, alumina micropowder, magnesium carbonate, cordierite, talc, electric fused magnesia-alumina spinel, andalusite and the like, the surface working layer of the crucible adopts fine particles of corrosion-resistant materials as main materials, the substrate layer adopts materials with small thermal expansion coefficient and high temperature resistance as main materials, the time of bottom peeling and material adhesion is slowed down, the side and bottom cracking phenomena are solved, and a crucible blank has certain strength. Although the crucible can achieve 60 times of service life, the requirement for matching the substrate layer is high, and the working layer and the substrate layer need to be improved at the same time.
Disclosure of Invention
In order to overcome the defects of the prior art, the technical problems to be solved by the invention are as follows: provides a corrosion-resistant protective layer of a crucible arranged on the inner surface of the crucible.
In order to solve the technical problems, the invention adopts the technical scheme that: the corrosion-resistant protective layer for the crucible comprises the following components in percentage by weight:
10-20% of cordierite, 15-29% of electric melting spinel, 5-15% of M70 mullite, 5-15% of white corundum, 5-10% of andalusite, 2-8% of kaolin, 10-30% of α -alumina, 2-20% of potash feldspar and 10-20% of kaliophilite.
The invention has the beneficial effects that: according to the corrosion-resistant protective layer for the crucible, provided by the invention, a certain amount of kaliophilite is added, the kaliophilite is rich in more K elements, and after the kaliophilite is combined with other raw materials, the reaction of the inner wall of the crucible and a ternary material is weakened, the corrosion of an anode material to the crucible is reduced, the long-term normal use of the crucible is ensured, the corrosion resistance of the crucible is increased, the service life of the crucible is prolonged, and the production cost of an enterprise is reduced.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description will be given with reference to the embodiments.
The most key concept of the invention is as follows: adding kaliophilite of 10-20% into the corrosion-resistant protective layer of the crucible.
The invention provides a corrosion-resistant protective layer of a crucible, which comprises the following components in percentage by weight:
10-20% of cordierite, 15-29% of electric melting spinel, 5-15% of M70 mullite, 5-15% of white corundum, 5-10% of andalusite, 2-8% of kaolin, 10-30% of α -alumina, 2-20% of potash feldspar and 10-20% of kaliophilite.
From the above description, the beneficial effects of the present invention are: according to the corrosion-resistant protective layer for the crucible, provided by the invention, a certain amount of kaliophilite is added, the kaliophilite is rich in more K elements, and after the kaliophilite is combined with other raw materials, the reaction of the inner wall of the crucible and a ternary material is weakened, the corrosion of an anode material to the crucible is reduced, the long-term normal use of the crucible is ensured, and the corrosion resistance of the crucible is increased.
Furthermore, the corrosion-resistant protective layer of the crucible also comprises 0-10% of zirconia.
As is apparent from the above description, zirconia is chemically stable and resistant to high temperatures, and the durability of the crucible can be improved by adding a proper amount of zirconia.
Further, the corrosion-resistant protective layer of the crucible is arranged on the bottom of the inner wall of the crucible.
Furthermore, the thickness of the corrosion-resistant protective layer of the crucible is 0.5-4 mm.
Further, the corrosion-resistant protective layer for the crucible comprises the following components, by weight, 15% of cordierite, 29% of electrofused spinel, 6% of M70 mullite, 11% of white corundum, 6% of andalusite, 4% of kaolin, 2% of zirconia, 10% of α -alumina, 2% of potash feldspar and 15% of kaliophilite
Further, the thickness of the corrosion-resistant protective layer of the crucible is 3 mm.
The formulations of the materials for the corrosion-resistant protective layers of the crucibles of examples 1 to 6 are shown in Table 1:
TABLE 1
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Cordierite (%) | 15 | 10 | 20 | 10 | 15 | 12 |
| Fused spinel (%) | 29 | 20 | 25 | 15 | 20 | 22 |
| M70 mullite (%) | 6 | 15 | 5 | 5 | 5 | 6 |
| White corundum (%) | 11 | 5 | 10 | 5 | 15 | 8 |
| Andalusite (%) | 6 | 5 | 5 | 10 | 5 | 7 |
| Kaolin (%) | 4 | 2 | 5 | 8 | 3 | 4 |
| Zirconium oxide (%) | 2 | 3 | 0 | 2 | 10 | 1 |
| α -alumina (%) | 10 | 10 | 15 | 30 | 12 | 10 |
| Potassium feldspar (%) | 2 | 10 | 5 | 5 | 3 | 20 |
| Kaolinitum (%) | 15 | 20 | 10 | 10 | 12 | 10 |
Example 7:
the crucible for sintering the battery anode material comprises a base body and the corrosion-resistant protective layer of the crucible provided by the embodiments 1-6, wherein the base body consists of the following components in percentage by weight: 30% mullite, 19% white corundum, 12% cordierite, 15% kaolin, 10% alumina, 4% zirconia and 10% andalusite;
the substrate is used for preparing the crucible, the corrosion-resistant protective layer of the crucible provided by the embodiments 1-6 is arranged on the bottom surface of the inner wall of the crucible made of the substrate, the specific preparation method of the crucible is pressure dry forming, and the method is the same as the prior art and is not repeated herein;
the crucibles obtained by preparing the corrosion-resistant protective layer for the crucibles provided in examples 1 to 6 were denoted by A1, B1, C1, D1, E1 and F1, respectively, and the number of times of use and the room-temperature compressive strength thereof are shown in Table 2, and the thicknesses of the corrosion-resistant protective layers for the crucibles of A1, B1, C1, D1, E1 and F1 were 3mm, 1mm, 4mm, 2mm, 0.5mm and 3mm, respectively.
Example 8:
the crucible for sintering the battery anode material comprises a base body and the corrosion-resistant protective layer of the crucible provided by the embodiments 1-6, wherein the base body consists of the following components in percentage by weight: 40% mullite, 8% white corundum, 25% cordierite, 12% kaolin, 8% alumina, 5% quartz and 2% andalusite;
the base body is used for preparing the crucible, the corrosion-resistant protective layer of the crucible provided by the embodiments 1-6 is arranged on the bottom surface of the inner wall of the crucible made of the base body, and the specific preparation method of the crucible is pressure dry forming, which is the same as the prior art;
the crucibles obtained by preparing the corrosion-resistant protective layer for the crucibles provided in examples 1 to 6 were denoted by A2, B2, C2, D2, E2 and F2, respectively, and the number of times of use and the room-temperature compressive strength thereof are shown in Table 2, and the thicknesses of the corrosion-resistant protective layers for the crucibles of A2, B2, C2, D2, E2 and F2 were 3mm, 1mm, 4mm, 2mm, 0.5mm and 3mm, respectively.
Comparative example 1:
a sintered crucible for a battery positive electrode material, comprising a base body and a protective layer, the composition formulation of the base body being the same as that of example 7, the composition formulation of the protective layer being different from that of example 1 in that kaliophilite is not contained, the content of potassium feldspar is 17%, the thickness of the protective layer is 3mm, and the resultant crucible G1 is represented.
Comparative example 2:
a sintered crucible for a battery positive electrode material, comprising a base body having the same composition formula as in example 7 and a protective layer having a composition formula different from that of example 1 in that the content of kaliophilite was 3%, the content of potassium feldspar was 14%, and the thickness of the protective layer was 3mm, and the resultant crucible was represented by G2.
Comparative example 3:
a crucible for sintering a battery positive electrode material, comprising a base body and a protective layer, the composition formula of the base body being the same as that of example 8, and the composition formula of the protective layer being different from that of example 1 in that kaliophilite is not contained, the content of white corundum is 27%, and the resultant crucible H1 is represented.
Comparative example 4:
a crucible for sintering a battery positive electrode material, comprising a base body and a protective layer, the composition formula of the base body being the same as that of example 8, the composition formula of the protective layer being different from that of example 1 in that the content of kaliophilite is 5% and the content of white corundum is 21%, and the resultant crucible H2 is represented.
TABLE 2
It can be seen that the influence of the composition of the base material on the use times is small, the use times of the crucible is mainly determined by the corrosion-resistant protective layer, the corrosion-resistant protective layer does not need to be arranged on the whole inner wall of the crucible, the effect of increasing the use times can be achieved only by arranging the corrosion-resistant protective layer at the bottom, the use times of the crucible can be obviously influenced by the use of kaliophilite, and the service life of the crucible can be prolonged.
In conclusion, the corrosion-resistant protective layer for the crucible, provided by the invention, is characterized in that a certain amount of kaliophilite is added, the kaliophilite is rich in more K elements, and after the kaliophilite is combined with other raw materials, the reaction between the inner wall of the crucible and a ternary material is weakened, the corrosion of an anode material to the crucible is reduced, the long-term normal use of the crucible is ensured, and the corrosion resistance of the crucible is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention in the specification or directly or indirectly applied to the related technical field are included in the scope of the present invention.
Claims (5)
1. The corrosion-resistant protective layer for the crucible is characterized by comprising the following components in percentage by weight:
10-20% of cordierite, 15-29% of electric melting spinel, 5-15% of M70 mullite, 5-15% of white corundum, 5-10% of andalusite, 2-8% of kaolin, 10-30% of α -alumina, 2-20% of potash feldspar and 10-20% of kaliophilite.
2. The corrosion-resistant protective layer for a crucible according to claim 1, further comprising 0 to 10% of zirconia.
3. The corrosion-resistant protective layer for the crucible as claimed in claim 2, which comprises, in weight percent, 15% cordierite, 29% electrocast spinel, 6% M70 mullite, 11% white corundum, 6% andalusite, 4% kaolin, 2% zirconia, 10% α -alumina, 2% potash feldspar and 15% kaliophilite.
4. The crucible corrosion protection layer of claim 3, wherein the thickness of the crucible corrosion protection layer is 3 mm.
5. The crucible corrosion protection layer of claim 1, wherein the crucible corrosion protection layer is disposed on a bottom of an inner wall of the crucible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010283616.XA CN111377755A (en) | 2020-04-13 | 2020-04-13 | Corrosion-resistant protective layer of crucible |
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| CN202010283616.XA CN111377755A (en) | 2020-04-13 | 2020-04-13 | Corrosion-resistant protective layer of crucible |
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| CN202010283616.XA Pending CN111377755A (en) | 2020-04-13 | 2020-04-13 | Corrosion-resistant protective layer of crucible |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979294A (en) * | 2021-03-17 | 2021-06-18 | 中南大学 | Waste sagger repairing coating and using method thereof |
| CN113200752A (en) * | 2021-04-02 | 2021-08-03 | 武汉科技大学 | Shaft kiln furnace lining for roasting lithium battery anode material and preparation method thereof |
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2020
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| GB113211A (en) * | 1917-06-05 | 1918-02-14 | Edgar Arthur Ashcroft | Improvements in the Manufacture of Potassium Chloride from Natural Silicates, Rocks, Minerals, Residues or Wastes containing Potash. |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979294A (en) * | 2021-03-17 | 2021-06-18 | 中南大学 | Waste sagger repairing coating and using method thereof |
| CN112979294B (en) * | 2021-03-17 | 2022-05-06 | 中南大学 | Waste sagger repairing coating and using method thereof |
| CN113200752A (en) * | 2021-04-02 | 2021-08-03 | 武汉科技大学 | Shaft kiln furnace lining for roasting lithium battery anode material and preparation method thereof |
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