CN105669198B - A kind of preparation method of lanthanum oxide-based ceramic core - Google Patents
A kind of preparation method of lanthanum oxide-based ceramic core Download PDFInfo
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- CN105669198B CN105669198B CN201610026438.6A CN201610026438A CN105669198B CN 105669198 B CN105669198 B CN 105669198B CN 201610026438 A CN201610026438 A CN 201610026438A CN 105669198 B CN105669198 B CN 105669198B
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- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 239000000919 ceramic Substances 0.000 title claims abstract description 70
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 36
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 239000000654 additive Substances 0.000 claims abstract description 16
- 230000000996 additive effect Effects 0.000 claims abstract description 16
- 238000000498 ball milling Methods 0.000 claims abstract description 13
- 239000002002 slurry Substances 0.000 claims abstract description 13
- 238000001746 injection moulding Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000013019 agitation Methods 0.000 claims abstract description 7
- 239000012188 paraffin wax Substances 0.000 claims abstract description 7
- 238000005245 sintering Methods 0.000 claims abstract description 7
- 239000002131 composite material Substances 0.000 claims abstract description 3
- 238000002955 isolation Methods 0.000 claims abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 229910052746 lanthanum Inorganic materials 0.000 claims description 7
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 241000045905 Acyrtus lanthanum Species 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000011812 mixed powder Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 238000005266 casting Methods 0.000 description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 229910052738 indium Inorganic materials 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- 229910017569 La2(CO3)3 Inorganic materials 0.000 description 1
- 229910003978 SiClx Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- NZPIUJUFIFZSPW-UHFFFAOYSA-H lanthanum carbonate Chemical compound [La+3].[La+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O NZPIUJUFIFZSPW-UHFFFAOYSA-H 0.000 description 1
- 229960001633 lanthanum carbonate Drugs 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/50—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare-earth compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- Compositions Of Oxide Ceramics (AREA)
Abstract
The present invention relates to a kind of preparation method of lanthanum oxide-based ceramic core, this method is：Lanthanum oxide powder and additive powder are subjected to ball milling mixing, after melted paraffin wax, mixed powder is gradually added into, carries out mechanical agitation, obtain composite ceramic core slurry；Then injection moulding method is used to prepare the lanthanum oxide-based ceramic core of required shape；Then lanthanum oxide-based ceramic core is sintered by powder embedded sintering technique, obtains required ceramic core；It finally needs to encapsulate under lanthanum oxide-based ceramic core vacuum or inert atmosphere protection by acquisition, isolation is contacted with air, until using.The process of preparing of lanthanum oxide-based ceramic core provided by the present invention is simple, and operability is strong, and the ceramic core of acquisition has high intensity, high yield rate disclosure satisfy that the use of higher pouring temperature, and readily removed in the core removing stage, conducive to its efficiency is improved, production cost is reduced.
Description
Technical field
The present invention relates to the exploitation of technical field of high temperature alloy ceramic core and preparation methods, in particular, provide one kind
The preparation method of lanthanum oxide-based ceramic core.
Background technology
With modern Aviation industrial expansion, aero-engine needs to use more advanced cooling system, this is just to whirlpool
The temperature capability of impeller blade has higher requirement.The temperature capability of turbo blade mainly is improved by two kinds of approach at present,
First, the temperature capability of high temperature alloy itself is improved, second is that reducing the temperature of blade using technique for cooling blades.In recent years, lead to
Cross change high temperature alloy itself and also achieve larger achievement to improve its temperature capability, however with the demand and performance requirement of blade
It compares, this is much inadequate.Therefore, constantly improve the air cooling structure of blade becomes aviation hair to improve its cooling efficiency
Motivation develops pursued target.
Adapter of the ceramic core as model casting hollow casting is the complicated inner cavity knot for forming hollow casting
Structure.With the development of efficient air-cooled blade, the cooling duct of blade is extremely complex, and structure is subtleer, this is to forming it
The ceramic core of complicated inner cavity structure has higher requirement.Ceramic core must have sufficiently high room temperature and elevated temperature strength,
It presses to resist the impact of high pressure, high speed, high viscosity wax liquor when wax, when cast will bear mechanical shock and the static pressure of high-temperature liquid metal
Power.After cast, due to the complexity and tractability of blade inner-cavity structure, it is de- using chemical method to determine that ceramic core is needed
It removes, this requires ceramic cores to have high porosity, makes the enough inside for smoothly reaching core of depoling liquid energy, easy and core
Reaction is to be removed.However, for complicated fine ceramic core, more demanding intensity, this just needs it
With high consistency, but high consistency can cause the removing of follow-up core more difficult；Consistency is low, the intensity of core
Naturally can be low, it is difficult to ensure the integrality of casting dimension again in casting process.Paradox between the two restricts ceramics
The fast development of core industry, to the subsequent development of ceramic core, more stringent requirements are proposed.
Lanthana is as a kind of rare metal oxide, because it is with good physicochemical properties, civilian, military and
High-tech area has had obtained relatively broad application.The fusing point of lanthana is 2315 DEG C, is far above the fusing point 1710 of silica
DEG C, also above 2050 DEG C of the fusing point of aluminium oxide, thus can be used under higher pouring temperature.Since lanthana is difficult to burn
Knot can add suitable additive, such as silica, oxygen to improve its sintering character and reduce sintering temperature in blank
Change magnesium, aluminium oxide or yttrium oxide etc..Silica belongs to acidic oxide, is soluble in aqueous slkali, can readily remove, but oxygen
SiClx base ceramic core temperature in use, can be anti-with the active element in high temperature alloy more than this temperature no more than 1550 DEG C
It answers.Aluminium oxide is neutral oxide, and chemical property is stablized, and solvability is poor in lye, and depoling is extremely difficult, this restricts again
Alumina based ceramic core further uses and develops.Sintered lanthanum oxide-based ceramic core has high intensity, completely
It disclosure satisfy that the cast under higher temperature, and lanthanum oxide powder easy absorbing carbon dioxide and water in being placed on air, gradually
Become lanthanum carbonate, be also soluble in dilute inorganic acid, more considerable is sintered lanthanum oxide-based ceramic core, in Composition Control
It can realize complete size degradation in range in the short time in boiling water, then remove, casting or high-temperature alloy blades will not be generated broken
Bad property acts on.This lanthanum oxide-based ceramic core is expected to more be widely applied.
Invention content
In order to solve prior art problem, it is an object of the invention to overcome existing technical disadvantages, a kind of oxidation is provided
The preparation method of lanthanum base ceramic core meets the preparation of high-temperature alloy hollow blade, to obtain with elaborate structure
Hollow turbine vane on use.Using this method prepare lanthanum oxide-based ceramic core have high intensity, high yield rate,
And be easy to remove in follow-up phase, it is very suitable for large-scale industrial production.
In order to reach foregoing invention purpose, the present invention uses following technical proposals：
A kind of preparation method of lanthanum oxide-based ceramic core, it is characterised in that there is following process and step：
（a）Lanthanum oxide powder and additive powder are subjected to ball milling mixing, additive powder be silica or aluminium oxide,
Or magnesia or yttrium oxide；Its additive amount is 10~20wt% of mixture of powders gross mass；Ratio of grinding media to material is 2:1, ball milling mixing
Time is 12~36h；After the completion of mixing, it is dried for 24 hours at 120 DEG C；In paraffin after 60~100 DEG C of fusings, gradually add
Enter the ceramic powder mixture of acquisition, mechanical agitation 10~60rpm/min of speed, 12~36h of mixing time, until stirring is equal
It is even, obtain composite ceramic core slurry；
（b）The ceramic core slurry temperature of acquisition is maintained at 80~90 DEG C, ceramic mould is carried out using injection moulding method
The preparation of core, injection pressure are 10~25Mpa, and the dwell time is 30~60s；
（c）Lanthanum oxide-based ceramic core is sintered using powder embedded sintering mode, buried powder filler is industrial oxidation lanthanum, will
Saggar equipped with core and buried powder filler is put into van-type resistance furnace and is sintered, and sintering environment is air atmosphere, burns temperature eventually and is
1200~1550 DEG C, soaking time is 2~12h, and furnace cooling later obtains lanthanum oxide-based ceramic core.
（d）It will be preserved under the lanthanum oxide-based ceramic core vacuum sintered packing or inert atmosphere protection, isolation and air
In moisture and carbon dioxide exposure, until use.
Compared with the existing technology, lanthanum oxide-based ceramic core of the invention has the characteristics that apparent and remarkable advantage：
（1）Lanthanum oxide-based ceramic core prepared by the present invention has high intensity, is suitable for making for higher pouring temperature
With.And combined with conventional injection molding method, it is strong to grasp the property done, and is conducive to large-scale production.
（2）The lanthanum oxide-based ceramic core of preparation is easy removing, can be removed completely in a short period of time in boiling water, no
Destruction can be generated to blade, improve product qualification rate, reduce the removing time of core, improve production efficiency.
Specific implementation mode：
Embodiment one
Matrix lanthanum oxide powder and additive silicon oxide powder are subjected to ball milling mixing, the additive amount of silica is 10wt%
（Relative to mixture of powders gross mass）, ratio of grinding media to material 2:1, ball milling for 24 hours, after the completion of mixing, is dried for 24 hours at 120 DEG C,
In paraffin after 90 DEG C of fusings, it is gradually added into the ceramic powder mixture of acquisition, mechanical agitation for 24 hours, it is compound to obtain lanthanum oxide-based
Ceramic slurry；Using injection moulding method, lanthanum oxide-based ceramic slurry is maintained 90 DEG C, injection pressure 15Mpa, when pressurize
Between 60s, obtain needed for shape lanthanum oxide-based ceramic core；Industrial oxidation lanthanum oxide-based ceramic core being positioned in saggar
In lanthanum filler, then saggar is placed in van-type resistance furnace and is sintered, it is 1500 DEG C to burn temperature eventually, soaking time 10h, with stove
It is cooling, lanthanum oxide-based ceramic core is obtained, its vacuum is dispensed preserve later, avoid contacting with air, until using.
Embodiment two
Matrix lanthanum oxide powder and additive alumina powder are subjected to ball milling mixing, the additive amount of aluminium oxide is 15wt%
（Relative to mixture of powders gross mass）, ratio of grinding media to material 2:1, ball milling for 24 hours, after the completion of mixing, is dried for 24 hours at 120 DEG C,
In paraffin after 90 DEG C of fusings, it is gradually added into the ceramic powder mixture of acquisition, mechanical agitation for 24 hours, it is compound to obtain lanthanum oxide-based
Ceramic slurry；Using injection moulding method, lanthanum oxide-based ceramic slurry is maintained 90 DEG C, injection pressure 15Mpa, when pressurize
Between 60s, obtain needed for shape lanthanum oxide-based ceramic core；Industrial oxidation lanthanum oxide-based ceramic core being positioned in saggar
In lanthanum filler, then saggar is placed in van-type resistance furnace and is sintered, it is 1500 DEG C to burn temperature eventually, soaking time 10h, with stove
It is cooling, lanthanum oxide-based ceramic core is obtained, its vacuum is dispensed preserve later, avoid contacting with air, until using.
Embodiment three
Matrix lanthanum oxide powder and additive magnesium oxide powder are subjected to ball milling mixing, the additive amount of magnesia is 10wt%
（Relative to mixture of powders gross mass）, ratio of grinding media to material 2:1, ball milling for 24 hours, after the completion of mixing, is dried for 24 hours at 120 DEG C,
In paraffin after 90 DEG C of fusings, it is gradually added into the ceramic powder mixture of acquisition, mechanical agitation for 24 hours, it is compound to obtain lanthanum oxide-based
Ceramic slurry；Using injection moulding method, lanthanum oxide-based ceramic slurry is maintained 90 DEG C, injection pressure 15Mpa, when pressurize
Between 60s, obtain needed for shape lanthanum oxide-based ceramic core；Industrial oxidation lanthanum oxide-based ceramic core being positioned in saggar
In lanthanum filler, then saggar is placed in van-type resistance furnace and is sintered, it is 1550 DEG C to burn temperature eventually, soaking time 10h, with stove
It is cooling, lanthanum oxide-based ceramic core is obtained, its vacuum is dispensed preserve later, avoid contacting with air, until using.
Example IV
Matrix lanthanum oxide powder and additive yttrium oxide powder are subjected to ball milling mixing, the additive amount of yttrium oxide is 20wt%
（Relative to mixture of powders gross mass）, ratio of grinding media to material 2:1, ball milling for 24 hours, after the completion of mixing, is dried for 24 hours at 120 DEG C,
In paraffin after 90 DEG C of fusings, it is gradually added into the ceramic powder mixture of acquisition, mechanical agitation for 24 hours, it is compound to obtain lanthanum oxide-based
Ceramic slurry；Using injection moulding method, lanthanum oxide-based ceramic slurry is maintained 90 DEG C, injection pressure 15Mpa, when pressurize
Between 60s, obtain needed for shape lanthanum oxide-based ceramic core；Industrial oxidation lanthanum oxide-based ceramic core being positioned in saggar
In lanthanum filler, then saggar is placed in van-type resistance furnace and is sintered, it is 1550 DEG C to burn temperature eventually, soaking time 10h, with stove
It is cooling, lanthanum oxide-based ceramic core is obtained, its vacuum is dispensed preserve later, avoid contacting with air, until using.
Claims (1)
1. a kind of preparation method of lanthanum oxide-based ceramic core, it is characterised in that have following process and step：
A. lanthanum oxide powder and additive powder are subjected to ball milling mixing, additive powder is silica or aluminium oxide or oxidation
Magnesium or yttrium oxide；Its additive amount is 10~20wt% of mixture of powders gross mass；Ratio of grinding media to material is 2:1, the ball milling mixing time is
12~36h；After the completion of mixing, it is dried for 24 hours at 120 DEG C；In paraffin after 60~100 DEG C of fusings, it is gradually added into acquisition
Ceramic powder mixture, mechanical agitation 10~60rpm/min of speed, 12~36h of mixing time are obtained until stir evenly
Composite ceramic core slurry；
B. the ceramic core slurry temperature of acquisition is maintained at 80~90 DEG C, the system of ceramic core is carried out using injection moulding method
Standby, injection pressure is 10~25Mpa, and the dwell time is 30~60s；
C. lanthanum oxide-based ceramic core is sintered using powder embedded sintering mode, buried powder filler is industrial oxidation lanthanum, will be equipped with
The saggar of core and buried powder filler is put into van-type resistance furnace and is sintered, and sintering environment is air atmosphere, and it is 1200 to burn temperature eventually
~1550 DEG C, soaking time is 2~12h, and furnace cooling later obtains lanthanum oxide-based ceramic core；
D. it will be preserved under the lanthanum oxide-based ceramic core vacuum sintered packing or inert atmosphere protection, isolation and the water in air
Point and carbon dioxide exposure, until use.
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| CN106847353B (en) * | 2017-01-05 | 2018-07-06 | 中国原子能科学研究院 | Lutetium oxide target piece pellet preparation process |
| CN110128159A (en) * | 2019-06-01 | 2019-08-16 | 安徽齐鑫新材料科技有限公司 | A kind of preparation method of rare earth oxide Al-base ceramic core |
| CN111574224B (en) * | 2020-05-28 | 2021-04-13 | 上海大学 | Easily-removed ceramic core and preparation method and application thereof |
| KR102680263B1 (en) * | 2021-12-06 | 2024-07-02 | 한국원자력연구원 | Method for producing reaction-reducing sintered body for high temperature furnace, reaction-reducing sintered body and high temperature furnace including the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304227A (en) * | 2013-07-01 | 2013-09-18 | 沈阳铸造研究所 | Alumina-based ceramic core for directional solidification and preparation method thereof |
| CN104072153A (en) * | 2014-05-24 | 2014-10-01 | 芜湖浙鑫新能源有限公司 | Lanthanum chloride coated nano magnesium oxide based ceramic core |
| CN104072137A (en) * | 2014-05-24 | 2014-10-01 | 芜湖浙鑫新能源有限公司 | Ceramic core for water pump impeller |
-
2016
- 2016-01-16 CN CN201610026438.6A patent/CN105669198B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304227A (en) * | 2013-07-01 | 2013-09-18 | 沈阳铸造研究所 | Alumina-based ceramic core for directional solidification and preparation method thereof |
| CN104072153A (en) * | 2014-05-24 | 2014-10-01 | 芜湖浙鑫新能源有限公司 | Lanthanum chloride coated nano magnesium oxide based ceramic core |
| CN104072137A (en) * | 2014-05-24 | 2014-10-01 | 芜湖浙鑫新能源有限公司 | Ceramic core for water pump impeller |
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