Continuous carbon fiber reinforced crucible preform and preparation method thereof

A preform and carbon fiber technology, applied in the field of crucibles, can solve the problems affecting the service life of the crucible, the continuous fiber content is small, the continuous fiber is insufficient, etc., and achieves the effect of good overall structural stability, guaranteed shape stability, and guaranteed strength.

Active Publication Date: 2014-01-01
JIANGSU TIANNIAO HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the carbon cloth is cut in a zigzag shape, resulting in less continuous fiber content in the overall structure of the prefabricated body. The bottom of the crucible is covered with multiple lobes, and the fiber continuity is poor. It is easy to crack when carrying a large amount of heavy objects for a long time. Local reinforcement measures, but the continuous fiber connecting the crucible side and the bottom of the crucible is still insufficient, and the joint between the crucible side and the bottom of the crucible is easy to fall off as the stress concentration point of the crucible, which affects the service life of the crucible

Method used

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  • Continuous carbon fiber reinforced crucible preform and preparation method thereof
  • Continuous carbon fiber reinforced crucible preform and preparation method thereof
  • Continuous carbon fiber reinforced crucible preform and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The basic unit consists of a layer of 3K plain weave carbon fiber cloth 12 and a layer density of 40g / m 2 The carbon fiber cloth / net tire compound material 10 that net tire 11 is pre-acupuncture formed, and its area density is 320g / m 2 , the pre-needling density is 2 needles / cm 2 ;

[0039] The number of cutting seams 13 of the carbon fiber cloth / net tire composite material 10 for the overall structure layer 5 is 6;

[0040] The number of cutting seams 13 of the carbon fiber cloth / net tire composite material 10 for the local reinforcement layer 6 is 6;

[0041] Fiber reinforcement method-7 continuous fibers form two equal directions (n=2) on the circumference of the beginning 4 of the crucible side. The number of parallel chords 14 formed in a single direction is 23 with a distance of 10 mm. The central axis 9 and the chord 14 are connected to the crucible side The line-surface angle α18 of the plane 16 formed by the wrapping track is 0°;

[0042] Layer design: the ov...

Embodiment 2

[0046] The basic unit is composed of two layers with a density of 400g / m 2 12K twill carbon fiber cloth with a layer density of 60g / m 2 12K grid tire 11 pre-needled carbon fiber cloth / net tire composite material 10, its surface density is 320g / m 2 , the pre-needling density is 3 needles / cm 2 ;

[0047] The overall structure layer 5 is 4 with carbon fiber cloth 12, the opening and cutting seam 13 quantity of net tire 11, as figure 2 shown;

[0048] The number of opening and cutting seams 13 of carbon fiber cloth 12 and mesh tire 11 for local reinforcement layer 6 is 4, as image 3 shown;

[0049] Fiber reinforcement method - 7 continuous fibers form three equal directions (n=3) on the 4th circumference of the crucible side, the number of parallel chords 14 formed in a single direction is 21, and the distance is 20mm. The line-surface angle α18 of the plane 16 formed by the wrapping track is 5°; as Figure 4 and 5 shown;

[0050] Fiber reinforcement method 2: The centr...

Embodiment 3

[0055] The basic unit is composed of a layer with a density of 320g / m 2 6K satin carbon fiber cloth 12 with a second layer density of 50g / m 2 The 12K mesh tire 11;

[0056] The overall structure layer 5 uses carbon fiber cloth 12, the number of opening and cutting seams 10 of the net tire 11 is 6;

[0057] The quantity of opening and cutting seams 10 of carbon fiber cloth 12 and mesh tire 11 for local reinforcing layer 6 is 6;

[0058] Fiber reinforcement mode 2: The central angle θ20 of the cross chord 19 formed by the continuous fibers on the circumference of the first 4 of the crucible side is 90°, and the line-plane angle β24 of the plane 22 formed by the central axis 9 and the chord 19 and the crucible side wrapping track is 30°. The total number of equally divided points m on the 4th circumference of the crucible side is 82;

[0059] Design of the number of layers: the overall structure layer 5 is 23 layers; the local reinforcement layer 6 is 9 layers; the fiber reinf...

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Abstract

The invention discloses a continuous carbon fiber reinforced crucible preform and a preparation method thereof. The preform is molded from basic unit layers and continuous fiber reinforced layers through needle punching; the bottom of a crucible and a connection area of the side and the bottom of the crucible are respectively reinforced by using the continuous fiber winding and laying technology, so the content of continuous fibers connected in an integral structure is effectively increased, strength needed during high load and high swelling stress conditions is guaranteed, cracking of the crucible or disconnection of the connection area of the side and the bottom of the crucible is prevented, and excellent shape stability can be maintained. Thus, the preform has excellent mechanical properties and a stable structure; after carbon / carbon composition, the crucible has good resistance to expansion, good structural stability, high thermal conduction efficiency and a long service life under a high load condition and can meet usage requirements of large-size crystalline silicon furnace crucibles.

Description

technical field [0001] The invention relates to the technical field of crucibles, in particular to a continuous carbon fiber reinforced crucible preform and a preparation method thereof. Background technique [0002] Quartz crucibles are used to store reaction materials in the process of monocrystalline silicon drawing and polycrystalline silicon smelting. Crucibles made of pure quartz will soften and deform at high temperatures, so supporting parts must be used to maintain the shape of the quartz crucible. Isotropic graphite materials have high heat resistance and high thermal shock resistance, especially good chemical stability, it is difficult to react with reactive gases such as SiO, and it is difficult to react with SiO in quartz crucible materials. 2 The reaction rate is low, and it has always been the material of choice for quartz crucibles. In recent years, with the increase in the diameter of silicon wafers, the required graphite crucibles have become larger in siz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C30B35/00
CPCC04B35/83C04B2235/5252C04B2235/77
Inventor 缪云良
Owner JIANGSU TIANNIAO HIGH TECH
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