CN106278342A - A kind of insulator toughening pottery and manufacture method thereof - Google Patents

A kind of insulator toughening pottery and manufacture method thereof Download PDF

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Publication number
CN106278342A
CN106278342A CN201610678026.0A CN201610678026A CN106278342A CN 106278342 A CN106278342 A CN 106278342A CN 201610678026 A CN201610678026 A CN 201610678026A CN 106278342 A CN106278342 A CN 106278342A
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insulator
parts
heart portion
blank
top layer
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何苗
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Ningbo High Technology Consulting Services Co Ltd
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Ningbo High Technology Consulting Services Co Ltd
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Abstract

The invention discloses a kind of insulator toughening pottery and manufacture method thereof, its raw material includes the material of following weight portion: aluminium borate whisker 23 parts, the silicon carbide micro-powder 70 80 parts of appropriate size, the aluminium nitride micropowder 20 30 parts of appropriate size, 1 1.5 parts of calcium fluoride powder, carbon dust 10 15 parts, molybdenum silicide 10 15 parts, tetraethoxysilance 68 parts, dehydrated alcohol 35 parts, pure water 35 parts, thermoplastic phenolic resin 1.5 2.5 parts；Sinter through raw material preparation, pre-prepared insulator, insulator and complete, defining specific insulation >=2 × 1013Ω cm, dielectric strength >=750kV/cm, thermal conductivity >=25W/m K, bending strength >=400Mpa, young's modulus >=320Gpa, the high tenacity insulating ceramics of fracture toughness >=25Mpa.The good economy performance of the present invention, high temperature oxidation resisting, fracture toughness are high, main material has complementary functions.

Description

A kind of insulator toughening pottery and manufacture method thereof
Technical field
The present invention relates to field of electrical components, particularly relate to a kind of insulator toughening pottery and manufacture method thereof.
Background technology
Insulator is a kind of special insulation control, it is possible to play an important role in overhead transmission line.
Between Zao Nian, insulator is used for electric pole, and the one end being slowly developed in high type high-tension bus-bar connection tower has hung a lot of dish The insulator of shape, it is generally made up of glass or pottery to increase creep age distance, is just insulator.Insulator is at frame Playing two basic roles in empty transmission line of electricity, i.e. support wire and prevent electric current from going back to ground, the two effect must be guaranteed； Meanwhile, insulator should have enough electrical insulation strength, moisture-resistance and resistances to elevated temperatures.
In the Patents the most applied for, patent " high insulating silicon carbide/boron nitride ceramic material and preparation side thereof Method " (application number: 201310294766.0, publication date: 2015-01-14), disclose a kind of carborundum/boron nitride ceramic material And preparation method thereof, but this bi-material belongs to fragile material, and its fracture toughness is not higher than 6Mpa, easily shakes with other in transport Fracturing or break up under condition of starting building, its this invention outer belongs to high temperature sintering (1900 DEG C-2300 DEG C) and adds hip moulding, its cost Too high, it is impossible to carry out industrialized production, on the other hand, owing to the oxidizing temperature of carborundum is relatively low, when electrical short produces high temperature, This insulator easily occurs superficial oxidation to cause insulating properties to reduce；Patent " the inorganic nano combined pottery of a kind of insulating heat-conductive And its production and use " (application number: 201410310359.9, publication date: 2015-12-30), disclose a kind of inorganic receive Nano-scale composite ceramics, protects after pottery is made in its active ingredient and is brittle materials, does not has patent, simultaneously the most not by material Combination property advantage bring into play.
Summary of the invention
For solving drawbacks described above present in prior art, it is desirable to provide a kind of good economy performance, high temperature oxidation resisting, Fracture toughness is high, good combination property and main material have complementary functions insulator toughening pottery and manufacture method thereof.
To achieve these goals, the present invention is by the following technical solutions: the manufacturer of a kind of insulator toughening pottery Method, it is characterised in that comprise the following steps:
1) raw material prepares
Prepare aluminium borate whisker 2-3 part, silicon carbide micro-powder 70-80 part of particle size 3 μm-5 μm, granule chi the most by weight Aluminium nitride micropowder 20-30 part of very little 3 μm-5 μm, calcium fluoride powder 1-1.5 part, carbon dust 10-15 part, molybdenum silicide 10-15 part, positive silicon Acid second fat 6-8 part, dehydrated alcohol 3-5 part, pure water 3-5 part, thermoplastic phenolic resin 1.5-2.5 part；
2. all aluminium borate whiskers, the silicon carbide micro-powder of 60%-75%, all carbon dusts and all molybdenum silicide micropowders are mixed and stirred for Uniformly, as heart portion material；Remaining silicon carbide micro-powder, all aluminium nitride micropowders and all calcium fluoride are mixed and stirred for all Even, as top layer material；
2) pre-prepared insulator
1. by 1) in the heart portion material that 2. obtains of step and all tetraethoxysilances, dehydrated alcohol, pure water, thermoplastic phenolic resin Putting in the heart portion mould scribbling releasing agent after fat mixing, the contoured three-dimensional size of heart portion mould is all at required target insulator chi Reduce 8mm-10mm on the basis of very little, this heart portion mould is placed at 800 DEG C-850 DEG C, be incubated in protective atmosphere or vacuum environment 5h-8h, it is thus achieved that heart portion blank；
2. by 1) in top layer material place mat 4mm-5mm in the insulator mold scribble releasing agent of 2. obtaining of step;Again will step The rapid heart portion blank 1. obtained is placed in insulator mold middle, the centre of surface of top layer material matting layer；
3. continue to put in insulator mold by top layer material in the case of not affecting heart portion blank dimension, until being filled out by mould It is full of, it is thus achieved that pre-prepared insulator blank；
3) insulator sinters and completes
1. by 2) in the pre-prepared insulator blank that 3. obtains of step be placed in the protective atmosphere of 2-3 times of atmospheric pressure, with 1000 DEG C The heating rate of 200 DEG C/h-250 DEG C/h maintained above is warming up to 1600 DEG C-1700 DEG C, temperature retention time 4h-7h；
2. after having sintered, furnace cooling when furnace temperature T is not less than 1000 DEG C；Furnace temperature T is in 1000 DEG C of half blow-on of 800 DEG C≤T ＜ Door cooling；800 DEG C of air coolings of coming out of the stove of furnace temperature T ＜；The insulator blank of sintering is deviate from mould to T ＜ 150 DEG C by air cooling；
3. use diamond abrasive vibrator deburring equipment that insulator blank is carried out vibrator deburring and polishing, i.e. obtain Required insulator.
Tetraethoxysilance that in the manufacture method of above-mentioned a kind of insulator toughening pottery, wherein: 2), 1. step uses, Dehydrated alcohol, pure water, the weight ratio of thermoplastic phenolic resin are 4:2:2:1.
The protective atmosphere that in the manufacture method of above-mentioned a kind of insulator toughening pottery, wherein: 3), 1. step uses is excellent Elect argon as.
A kind of according to the insulator toughening pottery manufactured by above-mentioned manufacture method, wherein: be divided into heart portion and top layer, its Middle top layer includes the composition of following weight portion: carborundum 17.5-32 part, aluminium nitride 20-30 part, calcium fluoride 1-1.5 part；Heart portion wraps Include the composition of following weight portion: carborundum 58-77.5 part, aluminium borate whisker 2-3 part, indefinite compound 10-15 part of molybdenum.
The insulator toughening pottery prepared according to said method, its specific insulation >=2 × 1013Ω cm, dielectric are strong Degree >=750kV/cm, thermal conductivity >=25W/m K, bending strength >=400Mpa, young's modulus >=320Gpa, fracture toughness >= 25Mpa。
Compared with prior art, the invention have the advantages that the Alborex M 12 being mixed into proper proportion in heart portion material Whisker, molybdenum silicide granule, the former is implanted into toughening fiber at ceramic body, the latter strengthens directly raising heart portion carbonization mutually by intergranular The toughness of silicon pottery, the material on top layer is owing to being also mixed into a certain proportion of carborundum, and therefore the adhesion with heart portion can be very Good, have multiple strengthening to combine supporting zone and buffered region of crossing, simultaneously calcium fluoride also can promote to a certain extent top layer with The adhesion in heart portion and the toughness of aluminium nitride itself, therefore the ceramic fracture toughness of the present invention is up to 4 times of other insulant Above；Carborundum and aluminium nitride are all the extraordinary materials of insulating properties, but are limited to that carborundum is oxidizable, aluminium nitride fragility is the highest Intrinsic propesties, be used alone all cannot adapt to bad working environments (collision damage when such as transporting and install, after the aging short circuit of electric wire High-temperature oxydation, dust storm or hail vibrations etc.), carborundum is disposed primarily in heart portion by the present invention, top layer containing only partially carbonized silicon, a side Face increases the toughness of aluminium nitride, is the most also beneficial in use by hyperthermia induced superficial oxidation, and the silicon dioxide of generation enters one Step promote insulating properties, again be not result in oxidation after fragility raise or transition oxidation after insulating properties reduce, and aluminium nitride because of The addition of carborundum, adds the support of center toughness tissue, and its fracture toughness has considerable lifting, therefore, the present invention is high temperature resistant, Good combination property and main material have complementary functions；It addition, the present invention use be the material of less expensive, Er Qieneng in same domain Adapting to major part bad working environments, basis insulation and heat conductivility are even better than other insulating ceramics, so the economy of the present invention Good, it is suitable for widespread adoption and promotes；It addition, the present invention have selected optimum heating rate in sintering process, use again during cooling Ladder slow cooling, thermal stress and structural stress that insulator own is remaining are the most relatively low, add again vibration in later stage polishing Process, makes internal stress homogenization, improves the uniformity of overall performance, reduces notch sensitivity, and it is tough to be also that the present invention ruptures The major reason that property is high；The technique optimized make the carbon dust in heart portion and molybdenum silicide major part be reacted to external carborundum and The compound of molybdenum has filled up the gap of former Silicon Carbide Powder, improves compactness and the resistance to elevated temperatures of heart portion pottery, and Other heart portion sintering aid all can high-temperature gasification, due in vacuum environment sinter, the sintering aid of all high temperature gasified is equal Detached by vacuum pump, leave and sinter ceramic body completely, without leaving pore and loosening.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
In figure: top layer 1, heart portion 2.
Detailed description of the invention
Embodiment 1:
A kind of toughening pottery, is divided into heart portion 2 and top layer 1, and wherein top layer 1 includes the composition of following weight portion: carborundum 17.5 parts, Aluminium nitride 20 parts, 1 part of calcium fluoride；Heart portion 2 includes the composition of following weight portion: carborundum 58 parts, aluminium borate whisker 2 parts, molybdenum Indefinite compound 10 parts；
A kind of insulator toughening pottery, manufacture method comprises the following steps:
1) raw material prepares
Prepare aluminium borate whisker 2 parts, the silicon carbide micro-powder 70 parts of particle size 3 μm-5 μm, particle size 3 μ the most by weight The aluminium nitride micropowder of m-5 μm 20 parts, 1 part of calcium fluoride powder, carbon dust 10 parts, molybdenum silicide 10 parts, tetraethoxysilance 6 parts, anhydrous second Alcohol 3 parts, pure water 3 parts, thermoplastic phenolic resin 1.5 parts；
2. all aluminium borate whiskers, the silicon carbide micro-powder of 75%, all carbon dusts and all molybdenum silicide micropowders are mixed and stirred for all Even, as heart portion 2 material；Remaining silicon carbide micro-powder, all aluminium nitride micropowders and all calcium fluoride are mixed and stirred for uniformly, As top layer 1 material；
2) pre-prepared insulator
1. by 1) in heart portion 2 material that 2. obtains of step and all tetraethoxysilances, dehydrated alcohol, pure water, thermoplastic phenolic Put in heart portion 2 mould scribbling releasing agent after mixed with resin, wherein tetraethoxysilance, dehydrated alcohol, pure water, thermoplasticity phenol The weight ratio of urea formaldehyde is 4:2:2:1, and the contoured three-dimensional size of heart portion 2 mould all subtracts on the basis of required target insulator sizes Few 8mm, is placed in this heart portion 2 mould at 800 DEG C, is incubated 8h, it is thus achieved that heart portion 2 blank in protective atmosphere or vacuum environment；
2. by 1) in top layer 1 material place mat 4mm in the insulator mold scribble releasing agent of 2. obtaining of step;Again by step 1. The heart portion blank obtained is placed in insulator mold middle, the centre of surface of surface 1 material matting layer；
3. continue to put in insulator mold by top layer 1 material in the case of not affecting heart portion 2 blank dimension, until by mould Fill full, it is thus achieved that pre-prepared insulator blank；
3) insulator sinters and completes
1. by 2) in the pre-prepared insulator blank that 3. obtains of step be placed in the argon of 2 times of atmospheric pressure, protect with more than 1000 DEG C The heating rate holding 250 DEG C/h is warming up to 1700 DEG C, temperature retention time 4h；
2. after having sintered, furnace cooling when furnace temperature T is not less than 1000 DEG C；Furnace temperature T is in 1000 DEG C of half blow-on of 800 DEG C≤T ＜ Door cooling；800 DEG C of air coolings of coming out of the stove of furnace temperature T ＜；The insulator blank of sintering is deviate from mould to T ＜ 150 DEG C by air cooling；
3. use diamond abrasive vibrator deburring equipment that insulator blank is carried out vibrator deburring and polishing, i.e. obtain Required insulator.
The insulator toughening pottery produced by the present embodiment, its specific insulation is 5 × 1013Ω cm, dielectric strength For 810kV/cm, thermal conductivity be 29W/m K, bending strength be 430Mpa, young's modulus be 370Gpa, fracture toughness be 31Mpa。
Embodiment 2:
A kind of toughening pottery, is divided into heart portion 2 and top layer 1, and wherein top layer 1 includes the composition of following weight portion: carborundum 32 parts, nitrogen Change 30 parts of aluminum, 1.5 parts of calcium fluoride；Heart portion 2 includes the composition of following weight portion: carborundum 77.5 parts, aluminium borate whisker 3 parts, molybdenum Indefinite compound 15 parts；
A kind of insulator toughening pottery, manufacture method comprises the following steps:
1) raw material prepares
Prepare aluminium borate whisker 3 parts, the silicon carbide micro-powder 80 parts of particle size 3 μm-5 μm, particle size 3 μ the most by weight The aluminium nitride micropowder of m-5 μm 30 parts, 1.5 parts of calcium fluoride powder, carbon dust 15 parts, molybdenum silicide 15 parts, tetraethoxysilance 8 parts, anhydrous Ethanol 5 parts, pure water 5 parts, thermoplastic phenolic resin 2.5 parts；
2. all aluminium borate whiskers, the silicon carbide micro-powder of 60%, all carbon dusts and all molybdenum silicide micropowders are mixed and stirred for all Even, as heart portion 2 material；Remaining silicon carbide micro-powder, all aluminium nitride micropowders and all calcium fluoride are mixed and stirred for uniformly, As top layer 1 material；
2) pre-prepared insulator
1. by 1) in heart portion 2 material that 2. obtains of step and all tetraethoxysilances, dehydrated alcohol, pure water, thermoplastic phenolic Put in heart portion 2 mould scribbling releasing agent after mixed with resin, wherein tetraethoxysilance, dehydrated alcohol, pure water, thermoplasticity phenol The weight ratio of urea formaldehyde is 4:2:2:1, and the contoured three-dimensional size of heart portion 2 mould all subtracts on the basis of required target insulator sizes Few 10mm, is placed in this heart portion 2 mould at 850 DEG C, is incubated 5h, it is thus achieved that heart portion 2 blank in protective atmosphere or vacuum environment；
2. by 1) in top layer 1 material place mat 5mm in the insulator mold scribble releasing agent of 2. obtaining of step;Again by step 1. The heart portion blank obtained is placed in insulator mold middle, the centre of surface of surface 1 material matting layer；
3. continue to put in insulator mold by top layer 1 material in the case of not affecting heart portion 2 blank dimension, until by mould Fill full, it is thus achieved that pre-prepared insulator blank；
3) insulator sinters and completes
1. by 2) in the pre-prepared insulator blank that 3. obtains of step be placed in the argon of 3 times of atmospheric pressure, protect with more than 1000 DEG C The heating rate holding 200 DEG C/h is warming up to 1600 DEG C, temperature retention time 7h；
2. after having sintered, furnace cooling when furnace temperature T is not less than 1000 DEG C；Furnace temperature T is in 1000 DEG C of half blow-on of 800 DEG C≤T ＜ Door cooling；800 DEG C of air coolings of coming out of the stove of furnace temperature T ＜；The insulator blank of sintering is deviate from mould to T ＜ 150 DEG C by air cooling；
3. use diamond abrasive vibrator deburring equipment that insulator blank is carried out vibrator deburring and polishing, i.e. obtain Required insulator.
The insulator toughening pottery produced by the present embodiment, its specific insulation is 1 × 1014Ω cm, dielectric strength For 830kV/cm, thermal conductivity be 27W/m K, bending strength be 410Mpa, young's modulus be 360Gpa, fracture toughness be 29Mpa。
The operation principle of the present invention is: top layer aluminium nitride/fracture toughness of carborundum own is the lowest, again owing to there being the heart of toughening Portion, when by external impact, is buffered by the relative flexibility supporting layer in heart portion, improves the tolerance to impact, simultaneously Aluminium borate whisker is staggered in heart portion pottery as root system of plant, improves adhesion and the fracture toughness of heart portion pottery, Additionally processing plus technologic details optimization, three kinds of factors jointly act on and make the toughness of the present invention is the 4 of Conventional insulation pottery More than Bei, it is sufficient to adapt to the immalleable bad working environments of other insulating ceramics.
Described above to the disclosed embodiments, only for making professional and technical personnel in the field be capable of or using this Invention.Multiple amendment to these embodiments will be apparent from for those skilled in the art, herein institute The General Principle of definition can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, The present invention is not intended to be limited to the embodiments shown herein, and is to fit to special with principles disclosed herein and novelty The widest scope that point is consistent.

Claims (4)

1. the insulator manufacture method of toughening pottery, it is characterised in that comprise the following steps:
1) raw material prepares
Prepare aluminium borate whisker 2-3 part, silicon carbide micro-powder 70-80 part of particle size 3 μm-5 μm, granule chi the most by weight Aluminium nitride micropowder 20-30 part of very little 3 μm-5 μm, calcium fluoride powder 1-1.5 part, carbon dust 10-15 part, molybdenum silicide 10-15 part, positive silicon Acid second fat 6-8 part, dehydrated alcohol 3-5 part, pure water 3-5 part, thermoplastic phenolic resin 1.5-2.5 part；
2. all aluminium borate whiskers, the silicon carbide micro-powder of 60%-75%, all carbon dusts and all molybdenum silicide micropowders are mixed and stirred for Uniformly, as heart portion material；Remaining silicon carbide micro-powder, all aluminium nitride micropowders and all calcium fluoride are mixed and stirred for all Even, as top layer material；
2) pre-prepared insulator
1. by 1) in heart portion (2) material that 2. obtains of step and all tetraethoxysilances, dehydrated alcohol, pure water, thermoplasticity phenol Putting in heart portion (2) mould scribbling releasing agent after urea formaldehyde mixing, the contoured three-dimensional size of heart portion (2) mould is all at required mesh Reduce 8mm-10mm on the basis of mark insulator sizes, this heart portion (2) mould be placed at 800 DEG C-850 DEG C, at protective atmosphere or 5h-8h it is incubated, it is thus achieved that heart portion (2) blank in vacuum environment；
2. by 1) in top layer (1) material place mat 4mm-5mm in the insulator mold scribble releasing agent of 2. obtaining of step;Again Heart portion blank step 1. obtained is placed in insulator mold middle, the centre of surface of top layer (1) material matting layer；
3. continue to put in insulator mold by top layer (1) material in the case of not affecting heart portion (2) blank dimension, until will Mould is filled full, it is thus achieved that pre-prepared insulator blank；
3) insulator sinters and completes
1. by 2) in the pre-prepared insulator blank that 3. obtains of step be placed in the protective atmosphere of 2-3 times of atmospheric pressure, with 1000 DEG C The heating rate of 200 DEG C/h-250 DEG C/h maintained above is warming up to 1600 DEG C-1700 DEG C, temperature retention time 4h-7h；
2. after having sintered, furnace cooling when furnace temperature T is not less than 1000 DEG C；Furnace temperature T is in 1000 DEG C of half blow-on of 800 DEG C≤T ＜ Door cooling；800 DEG C of air coolings of coming out of the stove of furnace temperature T ＜；The insulator blank of sintering is deviate from mould to T ＜ 150 DEG C by air cooling；
3. use diamond abrasive vibrator deburring equipment that insulator blank is carried out vibrator deburring and polishing, i.e. obtain Required insulator.
A kind of insulator toughening the most according to claim 1 pottery manufacture method, it is characterised in that: 2) in step 1. The tetraethoxysilance of employing, dehydrated alcohol, pure water, the weight ratio of thermoplastic phenolic resin are 4:2:2:1.
A kind of insulator toughening the most according to claim 2 pottery manufacture method, it is characterised in that: 3) in step 1. The protective atmosphere used is preferably argon.
4. one kind according to the insulator manufactured by manufacture method described in Claims 2 or 3 with toughening pottery, it is characterised in that: Being divided into heart portion (2) and top layer (1), wherein top layer (1) includes the composition of following weight portion: carborundum 17.5-32 part, aluminium nitride 20-30 part, calcium fluoride 1-1.5 part；Heart portion (2) includes the composition of following weight portion: carborundum 58-77.5 part, aluminium borate whisker 2-3 part, indefinite compound 10-15 part of molybdenum.
CN201610678026.0A 2016-08-17 2016-08-17 A kind of insulator toughening pottery and manufacture method thereof Pending CN106278342A (en)

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CN109108268A (en) * 2018-08-20 2019-01-01 杨燕军 A kind of composite straight line style saw blade and its manufacturing method for semiconductor slice
CN109175378A (en) * 2018-08-20 2019-01-11 杨燕军 A kind of specialty metal saw blade and its manufacturing method using micro-arc oxidation process
CN109227973A (en) * 2018-08-20 2019-01-18 杨燕军 A kind of compound ultrahigh hardness saw blade of aluminium base diamond and its manufacturing method
CN109516793A (en) * 2019-01-21 2019-03-26 福建省威尔陶瓷股份有限公司 A kind of low-temp ceramics product and preparation method thereof

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CN107686337A (en) * 2017-09-02 2018-02-13 佛山市嘉亿艺术陶瓷研究有限公司 A kind of toughness reinforcing clay based on particulate reinforcement technology
CN108203300A (en) * 2018-02-07 2018-06-26 陕西科谷新材料科技有限公司 A kind of preparation method of high tenacity, high resistivity silicon carbide ceramics
CN108203300B (en) * 2018-02-07 2021-09-17 陕西科谷新材料科技有限公司 Preparation method of high-toughness and high-resistivity silicon carbide ceramic
CN109108268A (en) * 2018-08-20 2019-01-01 杨燕军 A kind of composite straight line style saw blade and its manufacturing method for semiconductor slice
CN109175378A (en) * 2018-08-20 2019-01-11 杨燕军 A kind of specialty metal saw blade and its manufacturing method using micro-arc oxidation process
CN109227973A (en) * 2018-08-20 2019-01-18 杨燕军 A kind of compound ultrahigh hardness saw blade of aluminium base diamond and its manufacturing method
CN109108268B (en) * 2018-08-20 2020-09-29 杨燕军 Composite linear scribing knife for semiconductor slicing and manufacturing method thereof
CN109516793A (en) * 2019-01-21 2019-03-26 福建省威尔陶瓷股份有限公司 A kind of low-temp ceramics product and preparation method thereof

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