CN116487107B - 一种金属护套矿物绝缘电缆及其制备方法 - Google Patents
一种金属护套矿物绝缘电缆及其制备方法 Download PDFInfo
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- CN116487107B CN116487107B CN202310737105.4A CN202310737105A CN116487107B CN 116487107 B CN116487107 B CN 116487107B CN 202310737105 A CN202310737105 A CN 202310737105A CN 116487107 B CN116487107 B CN 116487107B
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- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 60
- 239000011707 mineral Substances 0.000 title claims abstract description 60
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 39
- 239000002184 metal Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052802 copper Inorganic materials 0.000 claims abstract description 60
- 239000010949 copper Substances 0.000 claims abstract description 60
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 52
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 33
- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 24
- 229910007948 ZrB2 Inorganic materials 0.000 claims abstract description 21
- MANYRMJQFFSZKJ-UHFFFAOYSA-N bis($l^{2}-silanylidene)tantalum Chemical compound [Si]=[Ta]=[Si] MANYRMJQFFSZKJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- VWZIXVXBCBBRGP-UHFFFAOYSA-N boron;zirconium Chemical compound B#[Zr]#B VWZIXVXBCBBRGP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000012212 insulator Substances 0.000 claims abstract description 21
- 239000002121 nanofiber Substances 0.000 claims abstract description 21
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000005245 sintering Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 30
- 238000009987 spinning Methods 0.000 claims description 21
- 239000000243 solution Substances 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000001354 calcination Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 239000002243 precursor Substances 0.000 claims description 10
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- 235000019441 ethanol Nutrition 0.000 claims description 9
- -1 polyethylene Polymers 0.000 claims description 9
- 229920000573 polyethylene Polymers 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- YOBOXHGSEJBUPB-MTOQALJVSA-N (z)-4-hydroxypent-3-en-2-one;zirconium Chemical compound [Zr].C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O YOBOXHGSEJBUPB-MTOQALJVSA-N 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 6
- 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 claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 239000005662 Paraffin oil Substances 0.000 claims description 6
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 6
- 238000000498 ball milling Methods 0.000 claims description 6
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- 239000003063 flame retardant Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 4
- 230000003712 anti-aging effect Effects 0.000 claims description 4
- 239000012752 auxiliary agent Substances 0.000 claims description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 4
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 4
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 4
- 239000003431 cross linking reagent Substances 0.000 claims description 4
- 238000010041 electrostatic spinning Methods 0.000 claims description 4
- 239000004800 polyvinyl chloride Substances 0.000 claims description 4
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 4
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical group CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 claims description 4
- ZNRLMGFXSPUZNR-UHFFFAOYSA-N 2,2,4-trimethyl-1h-quinoline Chemical group C1=CC=C2C(C)=CC(C)(C)NC2=C1 ZNRLMGFXSPUZNR-UHFFFAOYSA-N 0.000 claims description 3
- 229920002943 EPDM rubber Polymers 0.000 claims description 3
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- 229920000642 polymer Polymers 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 2
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- 239000001856 Ethyl cellulose Substances 0.000 claims description 2
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 claims description 2
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 2
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 2
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 claims description 2
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 238000000748 compression moulding Methods 0.000 claims description 2
- 238000001523 electrospinning Methods 0.000 claims description 2
- 229920001249 ethyl cellulose Polymers 0.000 claims description 2
- 235000019325 ethyl cellulose Nutrition 0.000 claims description 2
- 238000011049 filling Methods 0.000 claims description 2
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 2
- 239000001863 hydroxypropyl cellulose Substances 0.000 claims description 2
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 claims description 2
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 2
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 2
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 2
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 claims description 2
- 229920000609 methyl cellulose Polymers 0.000 claims description 2
- 239000001923 methylcellulose Substances 0.000 claims description 2
- 235000010981 methylcellulose Nutrition 0.000 claims description 2
- 239000004014 plasticizer Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000010079 rubber tapping Methods 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 8
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- 239000002131 composite material Substances 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QBXVTOWCLDDBIC-UHFFFAOYSA-N [Zr].[Ta] Chemical compound [Zr].[Ta] QBXVTOWCLDDBIC-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JLUFWMXJHAVVNN-UHFFFAOYSA-N methyltrichlorosilane Chemical compound C[Si](Cl)(Cl)Cl JLUFWMXJHAVVNN-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
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- 239000000779 smoke Substances 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- KVMPUXDNESXNOH-UHFFFAOYSA-N tris(1-chloropropan-2-yl) phosphate Chemical group ClCC(C)OP(=O)(OC(C)CCl)OC(C)CCl KVMPUXDNESXNOH-UHFFFAOYSA-N 0.000 description 1
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- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
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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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
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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
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
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- H01—ELECTRIC ELEMENTS
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- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
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- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/12—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances ceramics
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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
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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
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- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Inorganic Insulating Materials (AREA)
Abstract
本发明公开一种金属护套矿物绝缘电缆及其制备方法,属于电力电缆制备技术领域,所述矿物绝缘电缆包括铜导杆、金属护套以及设置在所述铜导杆和所述金属护套间的矿物绝缘瓷柱,所述金属护套为铜或铝;所述矿物绝缘瓷柱为氧化镁、氧化锆纳米纤维、二硼化锆和二硅化钽的混合轻烧产物三者的混合烧结物;本发明通过复合改性促进氧化镁的成型烧结,同时降低烧结瓷柱的吸水性,进而提高电缆绝缘性。
Description
技术领域
本发明涉及电力电缆制备技术领域,具体涉及一种金属护套矿物绝缘电缆及其制备方法。
背景技术
矿物绝缘电缆(Mineral Insulated Cable)简称MI电缆,作为配线使用时,国内习惯称作氧化镁电缆或防火电缆。矿物绝缘电缆是由矿物材料氧化镁粉作为绝缘体的铜芯金属护套电缆,是用退火铜作为导体、密实氧化镁作为绝缘层、退火金属管(多为铜)作为护套的一种电缆,必要时,在退火金属护套外面挤包一层塑料外防腐护层,特殊要求无烟无卤场合可以在外面加一层低烟无卤护套。
矿物绝缘电缆具有耐高温、防火、防爆、不燃烧(250℃时可连续长时间运行,1000℃极限状态下也可作30min的短时间运行)且载流量大、外径小、机械强度高、使用寿命长,一般不需要独立接地导线的特点。其适用范围很广,可在海上、陆地、室内外、地上和地下应用;特别是在历史性建筑物、超高层、宾馆、商场、医院、机场、电视台、通讯枢纽工程、舰船、剧场、地铁、人防工程、人流密集的公共场所、易发生火灾的危险场所(如天然气厂、化工厂、炼油厂、海上石油平台等)得到广泛应用。它同时也可适用于环境温度高的场所,如发电厂、钢铁厂。对特殊环境,如抗电磁干扰、防动物啃咬、防水以及核电站也得到应用。
在矿物绝缘电缆的制备过程中,通常采用单一氧化镁粉作为绝缘层,它本身不会引起火灾,不会燃烧或助燃,但是氧化镁在煅烧后吸水性很高,可能造成电缆绝缘性变差;且单独采用氧化镁粉作为绝缘材料在煅烧过程中成型较困难,这将造成瓷柱制备时间长,成本较高。
发明内容
针对上述问题,本发明提供一种金属护套矿物绝缘电缆及其制备方法。
本发明的目的采用以下技术方案来实现:
一种金属护套矿物绝缘电缆,包括铜导杆、金属护套以及设置在所述铜导杆和所述金属护套间的矿物绝缘瓷柱,所述金属护套为铜或铝,优选为铜,可以为无缝铜管或铜带纵包焊接成的无缝铜管;
所述矿物绝缘瓷柱为氧化镁、氧化锆纳米纤维、二硼化锆和二硅化钽的混合轻烧产物三者的混合烧结物,其制备方法包括以下步骤:
将原料氧化镁升温至1000-1200℃煅烧0.5-1h,得到轻烧氧化镁,将所述轻烧氧化镁与所述氧化锆纳米纤维以及所述二硼化锆和二硅化钽的混合轻烧产物混合,充分搅拌后加入粘结剂以便成型,压制成型后得到瓷柱前体,将所述瓷柱前体进行煅烧烧结,制得所述矿物绝缘瓷柱;
所述氧化锆纳米纤维的制备方法包括以下步骤:
分别称取聚乙酰丙酮合锆、硅源并分散在溶剂中,搅拌混合后加入硝酸钇,充分混合搅拌至溶液透明,得到黄色的溶胶前体溶液,加入聚环氧乙烷,升温至50-60℃并保温搅拌60-120min,最后经消泡处理得到纺丝液,将所述纺丝液通过静电纺丝法制备得到纺丝纤维,将制得的纺丝纤维在流动的空气下进行预烧结,预烧结温度在400-600℃,预烧结时间1-2h,制得所述氧化锆纳米纤维;
其中,所述硅源为三乙氧基硅烷、氨丙基三乙氧基硅烷或正硅酸乙酯,所述溶剂为体积分数在80-90%的甲醇或乙醇的水溶液;
所述氧化锆纳米纤维以聚乙酰丙酮合锆为锆源,通过加入硅源形成锆非晶界面,降低氧化锆纤维在高温下的硬度,提高柔性;
所述二硼化锆和二硅化钽的混合轻烧产物的制备方法包括以下步骤:
分别称取二硼化锆和二硅化钽并混合,在无水乙醇中以碳化硅为研磨介质进行球磨,球磨完成后干燥,在流动的空气下进行预烧结,预烧结温度在600-800℃,预烧结时间1-2h,制得所述混合轻烧产物;
其中,所述二硼化锆与所述二硅化钽的质量比例为10:(1.2-1.5)。
在一些优选的实施方式中,所述静电纺丝的纺丝速度为1-3mL/h,纺丝电压20-25kV,气流速度15m/s,纺丝距离15-20cm。
在一些优选的实施方式中,所述氧化镁与所述氧化锆纳米纤维所述二硼化锆和二硅化钽的混合轻烧产物的质量混合比例为(55-65):(10-18):(5-12)。
在一些优选的实施方式中,所述粘结剂为纤维素、石蜡油、乙醇和水的混合溶液,其中,所述纤维素的质量百分比为0.04-0.14%,所述石蜡油的质量百分比为0.8-1.6%,所述乙醇的质量百分比为6-22%。
在一些优选的实施方式中,所述纤维素为甲基纤维素、乙基纤维素、羟乙基纤维素、羟丙基纤维素、羟丙基甲基纤维素、羧甲基纤维素中的一种或几种。
在一些优选的实施方式中,所述煅烧烧结的程序为,以2-5℃/min的速率缓慢升温至600℃,再以5-10℃/min的速率升温至1200-1350℃,保温2-3h,降温至600℃后再次以5-10℃/min的速率升温至1200-1350℃并保温0.5-1h,自然冷却至40-50℃出炉。
在一些优选的实施方式中,所述聚乙酰丙酮合锆与所述硅源、所述硝酸钇、所述溶剂、所述聚环氧乙烷的质量比例为10:(5-5.2):(0.06-0.07):(2.2-2.4):(0.004-0.006)。
在一些优选的实施方式中,所述金属护套矿物绝缘电缆还包括防腐保护外护套,所述防腐保护外护套为聚乙烯柔性阻燃材料,按重量份数计,所述聚乙烯柔性阻燃材料包括聚乙烯30-40份、聚氯乙烯10-18份、三元乙丙橡胶20-32份,聚乙烯基硅氮烷8-16份、助剂8-20份,所述助剂为填充剂、防老剂、交联剂、硫化剂、促进剂、增塑剂、润滑剂中的一种或多种;
所述聚乙烯基硅氮烷可以是通过一甲基三氯硅烷和二甲基二氯硅烷与氨气反应得到低聚物,其R/Si=1.2-1.8,分子量在300-2000,固含量30-40%的甲苯溶液,粘度在500~1500mPa·s,也可直接使用商品化产品,如Durazane 1800、Durazane 2200或Durazane2400。
在一些优选的实施方式中,所述填充剂为石英粉、高岭土、碳酸钙或氧化铝;所述防老剂为2,2,4-三甲基-1,2-二氢化喹啉聚合物,所述交联剂为硅烷偶联剂,所述硫化剂为BIBP硫化剂。
本发明的另一方面在于提供一种所述金属护套矿物绝缘电缆的制备方法,包括以下步骤:
(1)制备所述矿物绝缘瓷柱;
(2)通过瓷柱装配法将烧结成形的所述矿物绝缘瓷柱装填到铜导杆、金属护套之间,再通过多次拉拔退火制得;
(3)利用挤塑机挤包外护套制得。
本发明的有益效果为:
针对以单一氧化镁粉作为绝缘层存在的成型困难、煅烧后吸水性高的问题,本发明通过组分调整制得一种吸水率低、绝缘性能好的金属护套矿物绝缘电缆,其绝缘层在现有的氧化镁的基础上,通过加入具有极低热膨胀系数的氧化锆纳米纤维,一方面,高长径比的氧化锆纳米纤维可以促进氧化镁在粘结剂条件下的成型,提高成型的瓷柱前体强度,降低加工成型难度和成本,一方面则作为烧结氧化镁的填充剂,降低烧结氧化镁的吸水率,同时提高绝缘体积电阻;通过加入二硼化锆和二硅化钽的混合轻烧产物,在氧化镁高温烧结的同时形成锆钽的硼化物复合固溶体,一方面可以降低氧化镁烧结产物的热膨胀系数,降低烧结形成的微孔及其导致的吸水率,另一方面则提高了瓷柱的导热系数,利于电缆散热,作为本发明进一步的可选方案,所述金属护套矿物绝缘电缆还包括有防腐保护外护套,为在保证护套材料的防腐蚀性和柔性的同时提高其阻燃性,本发明在聚乙烯的基础引入聚氯乙烯提高体系相容性,加入三元乙丙橡胶提高柔性,加入低聚硅氮烷提高其阻燃性能,同时可以兼具良好的柔性。
附图说明
利用附图对本发明作进一步说明,但附图中的实施例不构成对本发明的任何限制,对于本领域的普通技术人员,在不付出创造性劳动的前提下,还可以根据以下附图获得其它的附图。
图1是本发明所述金属护套矿物绝缘电缆的结构示意图。
附图标记:1-铜导杆;2-矿物绝缘瓷柱;3-金属护套;4-防腐保护外护套。
具体实施方式
结合以下实施例对本发明作进一步描述。
实施例1
一种金属护套矿物绝缘电缆,包括铜导杆、铜护套以及设置在所述铜导杆和所述铜护套间的矿物绝缘瓷柱,所述铜护套为无缝铜管或铜带纵包焊接成的无缝铜管;
所述矿物绝缘瓷柱为氧化镁、氧化锆纳米纤维、二硼化锆和二硅化钽的混合轻烧产物三者的混合烧结物,其制备方法包括以下步骤:
将原料氧化镁升温至1100℃煅烧0.5h,得到轻烧氧化镁,将所述轻烧氧化镁与所述氧化锆纳米纤维以及所述二硼化锆和二硅化钽的混合轻烧产物按质量混合比例为30:7:4混合,充分搅拌后加入粘结剂以便成型,压制成型后得到瓷柱前体,将所述瓷柱前体进行煅烧烧结,制得所述矿物绝缘瓷柱;
所述粘结剂为羧甲基纤维素、石蜡油、乙醇和水的混合溶液,其中,所述羧甲基纤维素的质量百分比为0.08%,所述石蜡油的质量百分比为1.2%,所述乙醇的质量百分比为13%;
所述煅烧烧结的程序为,以5℃/min的速率缓慢升温至600℃,再以8℃/min的速率升温至1300℃,保温2h,降温至600℃后再次以8℃/min的速率升温至1300℃并保温0.5h,自然冷却至40-50℃出炉;
所述氧化锆纳米纤维的制备方法包括以下步骤:
分别称取聚乙酰丙酮合锆、三乙氧基硅烷并分散在乙醇水溶液(v/v=85:15)中,搅拌混合后加入硝酸钇,充分混合搅拌至溶液透明,得到黄色的溶胶前体溶液,加入聚环氧乙烷(Mw = 100万),升温至50-60℃并保温搅拌60min,最后经消泡处理得到纺丝液,将所述纺丝液通过静电纺丝法制备得到纺丝纤维,将制得的纺丝纤维在流动的空气下进行预烧结,预烧结温度在480℃,预烧结时间1h,制得所述氧化锆纳米纤维;
所述聚乙酰丙酮合锆与所述三乙氧基硅烷、所述硝酸钇、所述乙醇水溶液、所述聚环氧乙烷的质量比例为10:5.1:0.06:2.3:0.005;
所述静电纺丝的纺丝速度为2mL/h,纺丝电压25kV,气流速度15m/s,纺丝距离20cm;
所述二硼化锆和二硅化钽的混合轻烧产物的制备方法包括以下步骤:
分别称取二硼化锆和二硅化钽并混合,在无水乙醇中以碳化硅为研磨介质进行球磨,球磨完成后干燥,在流动的空气下进行预烧结,预烧结温度在650℃,预烧结时间1h,制得所述混合轻烧产物;
其中,所述二硼化锆与所述二硅化钽的质量比例为10:1.5;
所述金属护套矿物绝缘电缆的制备方法包括以下步骤:
(1)制备所述矿物绝缘瓷柱;
(2)通过瓷柱装配法将烧结成形的所述矿物绝缘瓷柱装填到铜导杆、铜护套之间,再通过多次拉拔退火制得。
实施例2
一种金属护套矿物绝缘电缆,包括铜导杆、铜护套以及设置在所述铜导杆和所述铜护套间的矿物绝缘瓷柱,所述铜护套为无缝铜管或铜带纵包焊接成的无缝铜管;
所述矿物绝缘瓷柱为氧化镁、氧化锆纳米纤维、二硼化锆和二硅化钽的混合轻烧产物三者的混合烧结物,其制备方法同实施例1,区别在于,所述煅烧烧结的程序为,以5℃/min的速率缓慢升温至600℃,再以8℃/min的速率升温至1300℃,保温2.5h,自然冷却至40-50℃出炉。
实施例3
一种金属护套矿物绝缘电缆,包括铜导杆、铜护套以及设置在所述铜导杆和所述铜护套间的矿物绝缘瓷柱,所述铜护套为无缝铜管或铜带纵包焊接成的无缝铜管;
所述矿物绝缘瓷柱为氧化镁、氧化锆纳米纤维两者的混合烧结物,其制备方法同实施例1。
实施例4
一种金属护套矿物绝缘电缆,包括铜导杆、铜护套以及设置在所述铜导杆和所述铜护套间的矿物绝缘瓷柱,所述铜护套为无缝铜管或铜带纵包焊接成的无缝铜管;
所述矿物绝缘瓷柱为氧化镁、二硼化锆和二硅化钽的混合轻烧产物两者的混合烧结物,其制备方法同实施例1。
实施例5
一种金属护套矿物绝缘电缆,包括铜导杆、铜护套以及设置在所述铜导杆和所述铜护套间的矿物绝缘瓷柱,所述铜护套为无缝铜管或铜带纵包焊接成的无缝铜管;
所述矿物绝缘瓷柱同实施例1;
所述金属护套矿物绝缘电缆还包括防腐保护外护套,所述防腐保护外护套为聚乙烯柔性阻燃材料,按重量份数计,所述聚乙烯柔性阻燃材料包括聚乙烯(LDPE-740E)36份、聚氯乙烯(PVC S-70)11份、三元乙丙橡胶22份,Durazane 1800 12份、石英粉4份、氧化铝2份、2,2,4-三甲基-1,2-二氢化喹啉聚合物1份、KH570 0.6份、BIBP硫化剂1份,其具体由各组分混炼挤塑成型制得。
对比例
一种金属护套矿物绝缘电缆,同实施例6,区别在于,所述Durazane 1800替换为磷酸三(1-氯-2-丙基)酯。
实验例
为了能够更加清楚地说明本发明,本发明对各实施例制得的瓷柱或外护套进行了性能检测,具体的,吸水率测定方法采用MTSY-4数显式陶瓷吸水率测定仪测定,绝缘电阻和耐压试验参照GB13033.1-2007,断裂伸长率测定方法参考ASTM D638-03,弹性模量测定方法参考ASTM D790-03,氧指数采用氧指数测试仪测定,水平燃烧测试参考GB2408-80测定,垂直燃烧测试参考GB2409-84测定,测定结果如表1-2所示。
表1 各实施例制得的瓷柱或外护套的性能检测结果
表2各实施例制得的外护套的性能检测结果
最后应当说明的是,以上实施例仅用以说明本发明的技术方案,而非对本发明保护范围的限制,尽管参照较佳实施例对本发明作了详细地说明,本领域的普通技术人员应当理解,可以对本发明的技术方案进行修改或者等同替换,而不脱离本发明技术方案的实质和范围。
Claims (10)
1.一种金属护套矿物绝缘电缆,其特征在于,包括铜导杆、金属护套以及设置在所述铜导杆和所述金属护套间的矿物绝缘瓷柱,所述金属护套为铜或铝;
所述矿物绝缘瓷柱为氧化镁、氧化锆纳米纤维、二硼化锆和二硅化钽的混合轻烧产物三者的混合烧结物,其制备方法包括以下步骤:
将原料氧化镁升温至1000-1200℃煅烧0.5-1h,得到轻烧氧化镁,将所述轻烧氧化镁与所述氧化锆纳米纤维以及所述二硼化锆和二硅化钽的混合轻烧产物混合,充分搅拌后加入粘结剂以便成型,压制成型后得到瓷柱前体,将所述瓷柱前体进行煅烧烧结,制得所述矿物绝缘瓷柱;
所述氧化锆纳米纤维的制备方法包括以下步骤:
分别称取聚乙酰丙酮合锆、硅源并分散在溶剂中,搅拌混合后加入硝酸钇,充分混合搅拌至溶液透明,得到黄色的溶胶前体溶液,加入聚环氧乙烷,升温至50-60℃并保温搅拌60-120min,最后经消泡处理得到纺丝液,将所述纺丝液通过静电纺丝法制备得到纺丝纤维,将制得的纺丝纤维在流动的空气下进行预烧结,预烧结温度在400-600℃,预烧结时间1-2h,制得所述氧化锆纳米纤维;
其中,所述硅源为三乙氧基硅烷、氨丙基三乙氧基硅烷或正硅酸乙酯,所述溶剂为体积分数在80-90%的甲醇或乙醇的水溶液;
所述二硼化锆和二硅化钽的混合轻烧产物的制备方法包括以下步骤:
分别称取二硼化锆和二硅化钽并混合,在无水乙醇中以碳化硅为研磨介质进行球磨,球磨完成后干燥,在流动的空气下进行预烧结,预烧结温度在600-800℃,预烧结时间1-2h,制得所述混合轻烧产物;
其中,所述二硼化锆与所述二硅化钽的质量比例为10:(1.2-1.5)。
2.根据权利要求1所述的一种金属护套矿物绝缘电缆,其特征在于,所述静电纺丝的纺丝速度为1-3mL/h,纺丝电压20-25kV,气流速度15m/s,纺丝距离15-20cm。
3.根据权利要求1所述的一种金属护套矿物绝缘电缆,其特征在于,所述氧化镁与所述氧化锆纳米纤维、所述二硼化锆和二硅化钽的混合轻烧产物的质量混合比例为(55-65):(10-18):(5-12)。
4.根据权利要求1所述的一种金属护套矿物绝缘电缆,其特征在于,所述粘结剂为纤维素、石蜡油、乙醇和水的混合溶液,其中,所述纤维素的质量百分比为0.04-0.14%,所述石蜡油的质量百分比为0.8-1.6%,所述乙醇的质量百分比为6-22%。
5.根据权利要求4所述的一种金属护套矿物绝缘电缆,其特征在于,所述纤维素为甲基纤维素、乙基纤维素、羟乙基纤维素、羟丙基纤维素、羟丙基甲基纤维素、羧甲基纤维素中的一种或几种。
6.根据权利要求1所述的一种金属护套矿物绝缘电缆,其特征在于,所述煅烧烧结的程序为,以2-5℃/min的速率缓慢升温至600℃,再以5-10℃/min的速率升温至1200-1350℃,保温2-3h,降温至600℃后再次以5-10℃/min的速率升温至1200-1350℃并保温0.5-1h,自然冷却至40-50℃出炉。
7.根据权利要求1所述的一种金属护套矿物绝缘电缆,其特征在于,所述聚乙酰丙酮合锆与所述硅源、所述硝酸钇、所述溶剂、所述聚环氧乙烷的质量比例为10:(5-5.2):(0.06-0.07):(2.2-2.4):(0.004-0.006)。
8.根据权利要求1所述的一种金属护套矿物绝缘电缆,其特征在于,所述金属护套矿物绝缘电缆还包括防腐保护外护套,所述防腐保护外护套为聚乙烯柔性阻燃材料,按重量份数计,所述聚乙烯柔性阻燃材料包括聚乙烯30-40份、聚氯乙烯10-18份、三元乙丙橡胶20-32份,聚乙烯基硅氮烷8-16份、助剂8-20份,所述助剂为填充剂、防老剂、交联剂、硫化剂、促进剂、增塑剂、润滑剂中的一种或多种。
9.根据权利要求8所述的一种金属护套矿物绝缘电缆,其特征在于,所述填充剂为石英粉、高岭土、碳酸钙或氧化铝;所述防老剂为2,2,4-三甲基-1,2-二氢化喹啉聚合物,所述交联剂为硅烷偶联剂,所述硫化剂为BIBP硫化剂。
10.根据权利要求1-9之一所述的一种金属护套矿物绝缘电缆的制备方法,其特征在于,包括以下步骤:
(1)制备所述矿物绝缘瓷柱;
(2)通过瓷柱装配法将烧结成形的所述矿物绝缘瓷柱装填到铜导杆、金属护套之间,再通过多次拉拔退火制得;
(3)利用挤塑机挤包外护套制得。
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