CN105525438A - Boron nitride fiber mat and preparation method thereof - Google Patents

Boron nitride fiber mat and preparation method thereof Download PDF

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Publication number
CN105525438A
CN105525438A CN201610037988.8A CN201610037988A CN105525438A CN 105525438 A CN105525438 A CN 105525438A CN 201610037988 A CN201610037988 A CN 201610037988A CN 105525438 A CN105525438 A CN 105525438A
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boron nitride
felt
fiber
nitride fiber
preparation
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CN105525438B (en
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齐学礼
张铭霞
王重海
唐杰
李伶
唐建新
林雪
李茹
黄健
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Beijing mechanical and electrical engineering general design department
Shandong Industrial Ceramics Research and Design Institute Co Ltd
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Shandong Industrial Ceramics Research and Design Institute Co Ltd
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4374—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece using different kinds of webs, e.g. by layering webs
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/498—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)

Abstract

The invention belongs to the technical field of ceramic fiber materials, and in particular relates to a boron nitride fiber mat and a preparation method thereof. The boron nitride fiber mat is prepared from the following raw materials in terms of volume fraction: 50 percent to 100 percent of a boron nitride cellucotton mat, 0 to 50 percent of a doped ceramic cellucotton mat and 0 to 50 percent of a continuous ceramic fiber-reinforced grid. A boron nitride fiber needled mat preform with the volume density of 0.1 to 0.5g/cm<3> is prepared through alternated overlapping and layer-by-layer needling by changing the volume fractions of the three raw materials, so that the preform can serve as an enhanced body of superhigh temperature anti-burning materials and high temperature wave-transmitting materials and can also serve as a high-temperature heatproof material or a high-temperature filtering material; the preparation method is simple in technology, the components and the structure are controllable, large-scale production is easily realized, and an excellent preform forming method is provided for the preparation of superhigh temperature anti-burning, wave-transmitting and heatproof materials in the fields of aviation, spaceflight and military hardware.

Description

Boron nitride fiber felt and preparation method thereof
Technical field
The invention belongs to ceramic fibre material technical field, be specifically related to a kind of boron nitride fiber felt and preparation method thereof.
Background technology
FRCMC has the features such as good toughness, good thermal shock, anti-yaw damper excellent performance, is widely used in the abnormal harsh sophisticated technology field of the service conditions such as Aeronautics and Astronautics, electronics, nuclear industry and weaponry.Can substantially meet the demands at present and the mainly SiO be applied 2f/SiO 2, the composite such as Cf/C and Cf/SiC.But along with development that is economic and science and technology, people are more and more higher to the materials demand with excellent properties more.By contrast, the good characteristic such as boron nitride fiber has high temperature resistant, resistance to chemical attack, dielectric properties are excellent, electrical insulating property good, thermal conductivity is good, oxidation resistance temperature than carbon fiber and boron fibre taller, can use for a long time in oxidizing atmosphere below 900 DEG C, and crystal grain can not be grown up in inert atmosphere within 2000 DEG C, intensity also can not decline.Boron nitride fiber strengthens ceramic matric composite and is expected to the defect overcoming fibre reinforced composites, obtains excellent normal temperature and high temperature power, heat, electric combination property, to solve practical application request.
At present, complexity due to boron nitride fiber technology of preparing limits its industrialization large-scale production, domestic only have only a few unit to carry out relevant subject study, and be nearly all be in the laboratory exploratory stage, causes the research of boron nitride fiber precast body forming technique to be reported few.Simultaneously, some characteristics of the difference had due to boron nitride fiber special construction and production technology and other ceramic fibres, causing other ceramic fiber prefabrication forming techniques directly cannot apply to the preparation of boron nitride fiber precast body, strengthening the extensive use of ceramic matric composite because which limit boron nitride fiber.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of boron nitride fiber felt, as the reinforcement of superhigh temperature anti-yaw damper material, high temperature wave-transparent material, also can use as high temperature heat insulation material, high-temperature-resistant filtering material; The present invention provides its preparation method simultaneously, and technique is simple, and parameter is controlled, is easy to accomplish scale production.
Boron nitride fiber felt of the present invention, with volume fraction, raw material is as follows:
The cotton felt 50 ~ 100% of boron nitride fiber;
Doped ceramics cellucotton felt 0 ~ 50%;
Continuous ceramic fiber strengthens grid 0 ~ 50%.
Described boron nitride fiber felt, with volume fraction, is preferably raw material as follows:
The cotton felt 60 ~ 90% of boron nitride fiber;
Doped ceramics cellucotton felt 5 ~ 30%;
Continuous ceramic fiber strengthens grid 5 ~ 30%.
The preparation method of described boron nitride fiber felt, comprises the steps:
(1) preparation of the cotton felt of boron nitride fiber: by shortly for boron nitride fiber cutting, combing, obtains the cotton felt of boron nitride fiber;
(2) preparation of doped ceramics cellucotton felt: by shortly for doped ceramics fiber cutting, combing, obtains doped ceramics cellucotton felt;
(3) continuous ceramic fiber strengthens the preparation of grid: continuous ceramic fortifying fibre is carried out multi-angle laying according to designing requirement, obtains continuous ceramic fiber and strengthens grid;
(4) acupuncture of fibrofelt: cotton for boron nitride fiber felt, doped ceramics cellucotton felt, continuous ceramic fiber are strengthened grid and successively lay, adopts needling process to be prepared into D refraction statics felt precast body.
Wherein:
In step (1), described boron nitride fiber length is 30 ~ 110mm, and diameter is 5 ~ 15 μm.
In step (2), described doped ceramics fiber is one or more in quartz fibre, carbon fiber or Zirconium oxide fibre.
In step (2), described doped ceramics fibre length is 30 ~ 110mm, and diameter is 5 ~ 15 μm.
In step (3), described continuous ceramic fortifying fibre is one or more in boron nitride fiber, quartz fibre or carbon fiber.
In step (3), it is 5 ~ 15 μm that described continuous ceramic fiber strengthens Gitterfasern diameter, every bundle fiber radical 1K ~ 3K, bundle pitch 5 ~ 15mm.
In step (3), described multi-angle is laid and is specially:
First, XY plane lays continuous ceramic fortifying fibre along a direction; Then lay one deck continuous ceramic fortifying fibre in XY plane along with the fiber the laid direction that forms an angle above, this angle can select an angle in 30 °, 45 °, 60 °, 75 ° or 90 °; The fiber that above-mentioned two steps are laid jointly forms continuous ceramic fiber and strengthens grid, lays for the cotton felt of later stage and boron nitride fiber and doped ceramics cellucotton felt lamination.
In step (4), described 0 °/90 ° angles that are successively laid in are laid.Described 0 °/90 ° angles are laid and are specially:
First in XY plane, the cotton felt of boron nitride fiber is laid along a direction (being set as 0 ° of direction); Then doped ceramics cellucotton felt is laid in XY plane along with cotton felt angle in 90 ° (the being set as 90 ° of directions) direction of the boron nitride fiber laid above; Finally lay continuous ceramic fiber in XY plane strengthen grid along with cotton felt angle in 90 ° (the 0 ° of the direction namely set) direction of the fortifying fibre laid above.Above step, every Rotating fields is alternately 0 °, 90 ° layings successively, and laying the number of plies can select as required.
Described 0 °/90 ° angles lay point four kinds of situations:
The first: described boron nitride fiber felt is by the cotton felt of boron nitride fiber, doped ceramics cellucotton felt, when continuous ceramic fiber enhancing grid is made, first in XY plane, the cotton felt of boron nitride fiber is being laid along a direction (being set as 0 ° of direction), and then lay doped ceramics cellucotton felt (being set as 90 ° of directions) with the cotton felt angle direction in 90 ° of the boron nitride fiber laid, lay continuous ceramic fiber in 0 ° of direction of setting again and strengthen grid, according to the cotton felt of boron nitride fiber, doped ceramics cellucotton felt, the order that continuous ceramic fiber strengthens grid is successively laid, the angle successively laid is 90 °.
The second: when described boron nitride fiber felt is become by the cotton felt of boron nitride fiber, doped ceramics cellucotton felt, first in XY plane, the cotton felt of boron nitride fiber is being laid along a direction (being set as 0 ° of direction), and then lay doped ceramics cellucotton felt (being set as 90 ° of directions) with the cotton felt angle direction in 90 ° of the boron nitride fiber laid, successively lay according to the order of the cotton felt of boron nitride fiber, doped ceramics cellucotton felt, the angle successively laid is 90 °.
The third: when described boron nitride fiber felt is made up of the cotton felt of boron nitride fiber, continuous ceramic fiber enhancing grid, first in XY plane, the cotton felt of boron nitride fiber is being laid along a direction (being set as 0 ° of direction), and then lay continuous ceramic fiber with the cotton felt angle direction in 90 ° of the boron nitride fiber laid and strengthen grid (being set as 90 ° of directions), the order strengthening grid according to the cotton felt of boron nitride fiber, continuous ceramic fiber is successively laid, and the angle successively laid is 90 °.
4th kind: when described boron nitride fiber felt is become by the cotton felt of boron nitride fiber, first in XY plane, the cotton felt of boron nitride fiber is being laid along a direction (being set as 0 ° of direction), then lay boron nitride fiber in 90 ° of angle directions cotton, successively lay according to the laying angle of 90 °.
In step (4), described needling process, needling density 5 ~ 40 pins/cm 2, interlayer density 5 ~ 25 layers/10mm; Bulk density 0.1 ~ the 0.5g/cm of described Nomex precast body 3.
Compared with prior art, beneficial effect of the present invention is as follows:
(1) the present invention prepares boron nitride fiber felt fibre diameter used and volume fraction can control according to Application Areas, realizes the controllability of special construction.
(2) precast body prepared by the present invention as the reinforcement of superhigh temperature anti-yaw damper material, high temperature wave-transparent material, also can use as high temperature heat insulation material, high-temperature-resistant filtering material.
(3) preparation technology of the present invention is simple, and composition and structure-controllable, be easy to accomplish scale production, and the preparation for materials such as Aeronautics and Astronautics, weaponry field superhigh temperature anti-yaw damper, wave transparent, solar heat protection provides a kind of precast body forming method of excellence.
Accompanying drawing explanation
Fig. 1 is boron nitride fiber felt picture prepared by the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described.
The all raw materials used in embodiment, except specified otherwise, are commercial.
Embodiment 1
Described boron nitride fiber felt, with volume fraction, raw material is as follows:
The cotton felt 70% of boron nitride fiber;
The cotton felt 30% of quartz fibre.
Its preparation method is as follows:
(1) preparation of the cotton felt of boron nitride fiber: by shortly for boron nitride fiber cutting, combing, obtains the cotton felt of boron nitride fiber; Described boron nitride fiber length is 30 ~ 50mm, and diameter is 8 μm;
(2) preparation of the cotton felt of quartz fibre: by shortly for quartz fibre cutting, combing, obtains the cotton felt of quartz fibre; Described quartz fibre length is 30 ~ 50mm, and diameter is 5 μm;
(3) acupuncture of fibrofelt: cotton for boron nitride fiber felt, the cotton felt of quartz fibre 0 ° in the in-plane direction/90 ° angles are successively laid, adopts needling process to be prepared into D refraction statics felt precast body.
Described needling process needling density 5 pins/cm 2, interlayer density 10 layers/10mm; Prepared boron nitride fiber Nomex precast body 350mm × 300mm × 35mm, bulk density is 0.1g/cm 3.
Embodiment 2
Described boron nitride fiber felt, with volume fraction, raw material is as follows:
The cotton felt 90% of boron nitride fiber;
Fibre reinforced grid 10%.
Its preparation method is as follows:
(1) preparation of the cotton felt of boron nitride fiber: by shortly for boron nitride fiber cutting, combing, obtains the cotton felt of boron nitride fiber; Described boron nitride fiber length is 40 ~ 90mm, and diameter is 12 μm;
(2) preparation of fibre reinforced grid: carbon fiber is carried out multi-angle laying according to designing requirement, obtains fibre reinforced grid; Described fibre reinforced Gitterfasern diameter is 15 μm, every bundle fiber radical 2K, bundle pitch 15mm;
(3) acupuncture of fibrofelt: cotton for boron nitride fiber felt, fibre reinforced grid 0 ° in the in-plane direction/90 ° angles are successively alternately laid, adopts needling process to be prepared into D refraction statics felt precast body.
Described needling process needling density 10 pins/cm 2, interlayer density 5 layers/10mm; Prepared boron nitride fiber Nomex precast body 200mm × 120mm × 20mm, bulk density is 0.3g/cm 3.
Embodiment 3
Described boron nitride fiber felt, with volume fraction, raw material is as follows:
The cotton felt 75% of boron nitride fiber;
The cotton felt 15% of quartz fibre;
Boron nitride fiber strengthens grid 10%.
Its preparation method is as follows:
(1) preparation of the cotton felt of boron nitride fiber: by shortly for boron nitride fiber cutting, combing, obtains the cotton felt of boron nitride fiber; Described boron nitride fiber length is 90 ~ 110mm, and diameter is 6 μm;
(2) preparation of the cotton felt of quartz fibre: by shortly for quartz fibre cutting, combing, obtains the cotton felt of quartz fibre; Described quartz fibre length is 90 ~ 110mm, and diameter is 10 μm;
(3) boron nitride fiber strengthens the preparation of grid: boron nitride fiber is carried out multi-angle laying according to designing requirement, obtains boron nitride fiber and strengthens grid; It is 8 μm that described boron nitride fiber strengthens Gitterfasern diameter, every bundle fiber radical 1K, bundle pitch 10mm;
(4) acupuncture of fibrofelt: cotton for boron nitride fiber felt, the cotton felt of quartz fibre, boron nitride fiber are strengthened grid 0 ° in the in-plane direction/90 ° angles and successively lay, adopts needling process to be prepared into D refraction statics felt precast body.
Described needling process needling density 20 pins/cm 2, interlayer density 15 layers/10mm; Prepared boron nitride fiber Nomex precast body 300mm × 200mm × 40mm, bulk density is 0.2g/cm 3.
Embodiment 4
Described boron nitride fiber felt, with volume fraction, raw material is as follows:
The cotton felt 90% of boron nitride fiber;
Carbon fiber cotton felt 5%;
Quartz fibre strengthens grid 5%.
Its preparation method is as follows:
(1) preparation of the cotton felt of boron nitride fiber: by shortly for boron nitride fiber cutting, combing, obtains the cotton felt of boron nitride fiber; Described boron nitride fiber length is 80 ~ 100mm, and diameter is 15 μm;
(2) preparation of carbon fiber cotton felt: by shortly for carbon fiber cutting, combing, obtains carbon fiber cotton felt; Described carbon fiber length is 60 ~ 80mm, and diameter is 15 μm;
(3) quartz fibre strengthens the preparation of grid: quartz fibre is carried out multi-angle laying according to designing requirement, obtains quartz fibre and strengthens grid; It is 13 μm that described quartz fibre strengthens Gitterfasern diameter, every bundle fiber radical 2.5K, bundle pitch 5mm;
(4) acupuncture of fibrofelt: cotton for boron nitride fiber felt, carbon fiber cotton felt, quartz fibre are strengthened grid 0 ° in the in-plane direction/90 ° angles and successively alternately lay, adopts needling process to be prepared into D refraction statics felt precast body.
Described needling process needling density 25 pins/cm 2, interlayer density 18 layers/10mm; Prepared boron nitride fiber Nomex precast body 200mm × 150mm × 30mm, bulk density is 0.4g/cm 3.
Embodiment 5
Described boron nitride fiber felt, with volume fraction, raw material is as follows:
The cotton felt 60% of boron nitride fiber;
Carbon fiber cotton felt 30%;
Quartz fibre strengthens grid 10%.
Its preparation method is as follows:
(1) preparation of the cotton felt of boron nitride fiber: by shortly for boron nitride fiber cutting, combing, obtains the cotton felt of boron nitride fiber; Described boron nitride fiber length is 55 ~ 80mm, and diameter is 11 μm;
(2) preparation of carbon fiber cotton felt: by shortly for carbon fiber cutting, combing, obtains carbon fiber cotton felt; Described carbon fiber length is 80 ~ 100mm, and diameter is 13 μm;
(3) quartz fibre strengthens the preparation of grid: quartz fibre is carried out multi-angle laying according to designing requirement, obtains quartz fibre and strengthens grid; It is 13 μm that described quartz fibre strengthens Gitterfasern diameter, every bundle fiber radical 3K, bundle pitch 8mm;
(4) acupuncture of fibrofelt: cotton for boron nitride fiber felt, carbon fiber cotton felt, quartz fibre are strengthened grid 0 ° in the in-plane direction/90 ° angles and successively alternately lay, adopts needling process to be prepared into D refraction statics felt precast body.
Described needling process needling density 40 pins/cm 2, interlayer density 20 layers/10mm; Prepared boron nitride fiber Nomex precast body 250mm × 150mm × 25mm, bulk density is 0.5g/cm 3.
Embodiment 6
Described boron nitride fiber felt, with volume fraction, raw material is as follows:
The cotton felt 60% of boron nitride fiber;
The cotton felt 10% of Zirconium oxide fibre;
Quartz fibre strengthens grid 30%.
Its preparation method is as follows:
(1) preparation of the cotton felt of boron nitride fiber: by shortly for boron nitride fiber cutting, combing, obtains the cotton felt of boron nitride fiber; Described boron nitride fiber length is 55 ~ 80mm, and diameter is 10 μm;
(2) preparation of the cotton felt of Zirconium oxide fibre: by shortly for Zirconium oxide fibre cutting, combing, obtains the cotton felt of Zirconium oxide fibre; Described Zirconium oxide fibre length is 50 ~ 70mm, and diameter is 5 μm;
(3) quartz fibre strengthens the preparation of grid: quartz fibre is carried out multi-angle laying according to designing requirement, obtains quartz fibre and strengthens grid; It is 13 μm that described quartz fibre strengthens Gitterfasern diameter, every bundle fiber radical 1.5K, bundle pitch 12mm;
(4) acupuncture of fibrofelt: cotton for boron nitride fiber felt, the cotton felt of Zirconium oxide fibre, quartz fibre are strengthened grid 0 ° in the in-plane direction/90 ° angles and successively alternately lay, adopts needling process to be prepared into D refraction statics felt precast body.
Described needling process needling density 30 pins/cm 2, interlayer density 25 layers/10mm; Prepared boron nitride fiber Nomex precast body 250mm × 150mm × 25mm, bulk density is 0.3g/cm 3.

Claims (10)

1. a boron nitride fiber felt, it is characterized in that: with volume fraction, raw material is as follows:
The cotton felt 50 ~ 100% of boron nitride fiber;
Doped ceramics cellucotton felt 0 ~ 50%;
Continuous ceramic fiber strengthens grid 0 ~ 50%.
2. boron nitride fiber felt according to claim 1, it is characterized in that: with volume fraction, raw material is as follows:
The cotton felt 60 ~ 90% of boron nitride fiber;
Doped ceramics cellucotton felt 5 ~ 30%;
Continuous ceramic fiber strengthens grid 5 ~ 30%.
3. a preparation method for the boron nitride fiber felt described in claim 1 or 2, is characterized in that: comprise the steps:
(1) preparation of the cotton felt of boron nitride fiber: by shortly for boron nitride fiber cutting, combing, obtains the cotton felt of boron nitride fiber;
(2) preparation of doped ceramics cellucotton felt: by shortly for doped ceramics fiber cutting, combing, obtains doped ceramics cellucotton felt;
(3) continuous ceramic fiber strengthens the preparation of grid: continuous ceramic fortifying fibre is carried out multi-angle laying according to designing requirement, obtains continuous ceramic fiber and strengthens grid;
(4) acupuncture of fibrofelt: cotton for boron nitride fiber felt, doped ceramics cellucotton felt, continuous ceramic fiber are strengthened grid and successively lay, adopts needling process to be prepared into D refraction statics felt precast body.
4. the preparation method of boron nitride fiber felt according to claim 3, is characterized in that: in step (1), and described boron nitride fiber length is 30 ~ 110mm, and diameter is 5 ~ 15 μm.
5. the preparation method of boron nitride fiber felt according to claim 3, is characterized in that: in step (2), and described doped ceramics fiber is one or more in quartz fibre, carbon fiber or Zirconium oxide fibre.
6. the preparation method of boron nitride fiber felt according to claim 3, is characterized in that: in step (2), and described doped ceramics fibre length is 30 ~ 110mm, and diameter is 5 ~ 15 μm.
7. the preparation method of boron nitride fiber felt according to claim 3, is characterized in that: in step (3), and described continuous ceramic fortifying fibre is one or more in boron nitride fiber, quartz fibre or carbon fiber.
8. the preparation method of boron nitride fiber felt according to claim 3, is characterized in that: in step (3), and it is 5 ~ 15 μm that described continuous ceramic fiber strengthens Gitterfasern diameter, every bundle fiber radical 1K ~ 3K, bundle pitch 5 ~ 15mm.
9. the preparation method of boron nitride fiber felt according to claim 3, is characterized in that: in step (4), and described 0 °/90 ° angles that are successively laid in are laid.
10. the preparation method of boron nitride fiber felt according to claim 3, is characterized in that: in step (4), described needling process, needling density 5 ~ 40 pins/cm 2, interlayer density 5 ~ 25 layers/10mm; Bulk density 0.1 ~ the 0.5g/cm of described Nomex precast body 3.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109931460A (en) * 2018-11-29 2019-06-25 苏州宏久航空防热材料科技有限公司 A kind of double-walled detachable high-temperature pipe joint insulation cover
CN111716862A (en) * 2020-05-22 2020-09-29 宜兴市华恒高性能纤维织造有限公司 Three-dimensional prefabricated part with needling and superficial sewing functions and preparation method thereof
CN115385705A (en) * 2022-09-30 2022-11-25 山东工业陶瓷研究设计院有限公司 Boron nitride fiber felt and preparation method thereof

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