An internally woven carbon fiber structure reinforced shaped crucible

Abstract

This invention provides a crucible reinforced with an internally woven carbon fiber structure. The crucible is a single piece, comprising a bottom and sidewalls. Both the bottom and sidewalls contain a carbon fiber mesh structure woven from one or more carbon fiber ropes. The carbon fiber mesh structure in the bottom and sidewalls is a single, integrally woven structure. The carbon fiber mesh structure has the same shape as the crucible, including one or more carbon fiber ropes radiating outwards from the bottom center and one or more carbon fiber ropes forming a circle. The radiating carbon fiber ropes are spaced above or below the circled carbon fiber ropes, intersecting and densely connected. This invention has anti-crack properties. By densifying the bottom, the crucible's support strength is enhanced, solving the problem of poor thermal shock resistance and easy cracking in one-piece crucibles.

Description

Technical Field

[0001] This invention belongs to the field of crucible technology, specifically relating to a crucible reinforced with an internally woven carbon fiber structure. Background Technology

[0002] Crucibles are an important component of chemical instruments. They are experimental devices used to melt or sinter objects, especially in the field of elemental analysis. Most chemical experiments require rapid cooling of the crucible; otherwise, inaccurate results can occur, leading to unnecessary problems. CN206626952U discloses a graphite crucible consisting of three interconnected layers. The second layer has threaded structures at its top and bottom, while the bottom and top of the first and third layers have matching nuts. The first and third layers have equal thickness, but the first layer is thicker than the second. CN105088147B discloses a crucible structure including a crucible body and a lid. The crucible body includes a bottom wall and side walls. One end of the side wall is connected to the bottom wall, and the lid is attached to the other end. The lid forms an acute angle with the axial direction of the crucible, and the lid has an opening. The crucible of this invention can effectively expand the vapor deposition area and improve the uniformity of vapor deposition. Existing crucibles on the market have poor shock resistance; if they break or crack during use, it will greatly affect the progress of experiments. Existing crucibles have a short lifespan; if materials with a high coefficient of thermal expansion, such as magnesium oxide, are used, the crucible's thermal shock resistance will be very poor, and transverse cracks are prone to occur during use, leading to crucible breakage and the inability to proceed with subsequent melting. Summary of the Invention

[0003] The purpose of this invention is to provide a crucible reinforced with an internally woven carbon fiber structure, which has the property of preventing cracking due to shock, strengthens the support strength of the crucible, and solves the problem of poor thermal shock resistance and easy cracking of one-piece crucibles.

[0004] To achieve the above objectives, the present invention provides an internally woven carbon fiber reinforced crucible. The crucible is integral, comprising a bottom and sidewalls. Both the bottom and sidewalls are provided with carbon fiber mesh structures, which are woven from one or more carbon fiber ropes. The carbon fiber mesh structures in the bottom and sidewalls are integrally woven carbon fiber mesh structures. The carbon fiber mesh structure has the same shape as the crucible, including one or more carbon fiber ropes radiating outward from the bottom center and one or more carbon fiber ropes encircling the crucible in a circle. The one or more carbon fiber ropes radiating outward from the center are spaced above or below the one or more carbon fiber ropes encircling the crucible in a circle. The one or more carbon fiber ropes radiating outward from the bottom center and the one or more carbon fiber ropes encircling the crucible are intersected and connected in a dense manner.

[0005] In a preferred embodiment, the carbon fiber mesh structure of the sidewall includes a first group of carbon fiber ropes and a second group of carbon fiber ropes; the carbon fiber ropes constituting the first group of carbon fiber ropes are oriented in the same direction, and the carbon fiber ropes constituting the second group of carbon fiber ropes are oriented in the same direction.

[0006] This invention provides a crucible reinforced with an internally woven carbon fiber structure. By incorporating a carbon fiber mesh structure inside the crucible and densifying it, the crucible's support strength is enhanced, preventing cracking due to shock. This solves the problems of poor thermal shock resistance and susceptibility to cracking in existing one-piece crucibles. The bottom and sidewalls of the carbon fiber mesh structure are integrally woven, further increasing the crucible's robustness. The structure resembles a woven bamboo basket, with one or more carbon fiber ropes radiating outwards from the bottom center and intersecting with one or more carbon fiber ropes forming a circle, creating a dense structure that strengthens the mesh's support. Experiments revealed that the carbon fiber ropes forming the first group and the second group are aligned in direction, resulting in even stronger sidewalls. It is speculated that this structure is better able to resist the forces generated by the alloy within the crucible during melting, making the crucible less prone to cracking.

[0007] In a preferred embodiment, the density of the carbon fiber mesh structure is 1.0–2.0 g / cm³. 3 Its elastic modulus is 250–350 GPa, and its tensile strength is 1000–1500 MPa.

[0008] In a preferred embodiment, the density of the carbon fiber mesh structure is 1.8 g / cm³. 3 Its elastic modulus is 280 GPa and its tensile strength is 1300 MPa.

[0009] In a preferred embodiment, the outer layer of the crucible is made of refractory material.

[0010] In a preferred embodiment, the refractory material is a magnesium aluminum spinel refractory material.

[0011] In a preferred embodiment, the magnesium-aluminum spinel refractory material has an aluminum oxide content of 45-50 wt%, an iron oxide content of ≤1.0 wt%, a refractoriness of 1780℃, and a bulk density of 2.55 g / cm³. 3 .

[0012] The inventors discovered a carbon fiber mesh structure with a density of 1.8 g / cm³. 3The elastic modulus is 280 GPa, which can effectively improve the crucible strength. The tensile strength of the carbon fiber mesh structure is 1300 MPa, which effectively improves the thermal shock resistance of the crucible. This invention uses a carbon fiber mesh structure with extremely low thermal conductivity, which reduces crucible burn-off to a certain extent and improves the crucible's service life. The inventors further discovered that the refractory material is a magnesium aluminate spinel refractory material, which synergistically enhances the crucible's thermal shock resistance and service life with the carbon fiber mesh structure. The inventors speculate that the carbon fiber mesh structure and the magnesium aluminate spinel refractory material undergo a fusion effect at high temperatures, which synergistically improves the crucible's performance. The inventors also found that the magnesium aluminate spinel refractory material has an aluminum oxide content of 45-50 wt%, an iron oxide content ≤1.0 wt%, a refractoriness of 1780℃, and a bulk density of 2.55 g / cm³. 3 The crucible exhibits the best performance. It is speculated that at high temperatures, nano-sized alumina can interact with carbon fibers, enhancing the bonding and compatibility between the carbon fiber network structure and the magnesium-aluminum spinel refractory material, thereby improving the crucible's shock resistance and reducing crack formation.

[0013] In a preferred embodiment, the bottom and sidewalls of the crucible are provided with one or more layers of carbon fiber mesh structure.

[0014] The present invention also provides a method for preparing the aforementioned internally braided carbon fiber structure reinforced molding crucible, comprising the following steps:

[0015] (1) Use carbon fiber rope to weave a carbon fiber mesh structure;

[0016] (2) Place the carbon fiber mesh structure in the middle layer of the mold, and then pour the refractory material.

[0017] In a preferred embodiment, the carbon fiber mesh structure is placed in the middle layer, with a distance control of 10cm intervals to ensure that the carbon fiber mesh structure is centered.

[0018] Compared with existing technologies, the advantages and beneficial effects of this invention are as follows: This invention provides a crucible reinforced with an internally woven carbon fiber structure, which has the property of preventing cracking due to shock. By densifying the crucible internally, the supporting strength of the crucible is strengthened, solving the problem of poor thermal shock resistance and easy cracking of one-piece crucibles. The internal reinforcing fiber mesh in this invention can be modified according to different materials. Attached Figure Description

[0019] Figure 1 A schematic diagram of a crucible reinforced with an internally woven carbon fiber structure;

[0020] Figure 2 A schematic diagram of the carbon fiber mesh structure within the sidewall;

[0021] Figure 3 To and Figure 2 Schematic diagrams of carbon fiber mesh structures with different densities.

[0022] Among them, 1. carbon fiber mesh structure, 2. first group of carbon fiber ropes, and 3. second group of carbon fiber ropes. Detailed Implementation

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1

[0025] Please see Figures 1-2 This embodiment provides an internally woven carbon fiber reinforced crucible. The crucible is integral, including a bottom and sidewalls. A layer of carbon fiber mesh structure 1 is provided inside both the bottom and sidewalls. The carbon fiber mesh structure 1 is woven from one or more carbon fiber ropes. The carbon fiber mesh structure 1 in the bottom and sidewalls is an integrally woven carbon fiber mesh structure 1. The carbon fiber mesh structure 1 has the same shape as the crucible, including one or more carbon fiber ropes radiating outwards from the bottom center and one or more carbon fiber ropes wrapped in a circle. The one or more carbon fiber ropes radiating outwards from the center are spaced above or below the one or more carbon fiber ropes wrapped in the circle, and the one or more carbon fiber ropes radiating outwards from the bottom center and the one or more carbon fiber ropes wrapped in the circle are intersected and connected in a dense manner. The carbon fiber mesh structure 1 of the sidewalls includes a first group of carbon fiber ropes 2 and a second group of carbon fiber ropes 3. The carbon fiber ropes forming the first group of carbon fiber ropes 2 are in the same direction, and the carbon fiber ropes forming the second group of carbon fiber ropes 3 are in the same direction.

[0026] The density of the carbon fiber mesh structure 1 is 1.8 g / cm³. 3 Its elastic modulus is 280 GPa and its tensile strength is 1300 MPa.

[0027] The outer layer of the crucible is made of refractory material, specifically magnesium aluminate spinel refractory. The magnesium aluminate spinel refractory has an aluminum oxide content of 45–50 wt%, an ferric oxide content ≤1.0 wt%, a refractoriness of 1780℃, and a bulk density of 2.55 g / cm³. 3 Purchased from Zibo Fuming Refractory Materials Co., Ltd., YNS-45.

[0028] The method for preparing an internally braided carbon fiber reinforced crucible includes the following steps:

[0029] (1) Use carbon fiber rope to weave a carbon fiber mesh structure;

[0030] (2) Place the carbon fiber mesh structure in the middle layer of the mold, with a distance control of 10cm between each layer to ensure that the carbon fiber mesh structure is centered, and then pour the refractory material.

[0031] Example 2

[0032] Please see Figure 3 This embodiment provides an internally woven carbon fiber reinforced crucible. The crucible is integral, including a bottom and sidewalls. A layer of carbon fiber mesh structure 1 is provided inside both the bottom and sidewalls. The carbon fiber mesh structure 1 is woven from one or more carbon fiber ropes. The carbon fiber mesh structure 1 in the bottom and sidewalls is an integrally woven carbon fiber mesh structure 1. The carbon fiber mesh structure 1 has the same shape as the crucible, including one or more carbon fiber ropes radiating outwards from the bottom center and one or more carbon fiber ropes wrapped in a circle. The one or more carbon fiber ropes radiating outwards from the center are spaced above or below the one or more carbon fiber ropes wrapped in the circle, and the one or more carbon fiber ropes radiating outwards from the bottom center and the one or more carbon fiber ropes wrapped in the circle are intersected and connected in a dense manner. The carbon fiber mesh structure 1 of the sidewalls includes a first group of carbon fiber ropes 2 and a second group of carbon fiber ropes 3. The carbon fiber ropes forming the first group of carbon fiber ropes 2 are in the same direction, and the carbon fiber ropes forming the second group of carbon fiber ropes 3 are in the same direction.

[0033] The density of the carbon fiber mesh structure 1 is 1.0 g / cm³. 3 Its elastic modulus is 340 GPa and its tensile strength is 1000 MPa.

[0034] The outer layer of the crucible is made of refractory material, specifically magnesium aluminate spinel refractory. The magnesium aluminate spinel refractory has an aluminum oxide content of 45–50 wt%, an ferric oxide content ≤1.0 wt%, a refractoriness of 1780℃, and a bulk density of 2.55 g / cm³. 3 Purchased from Zibo Fuming Refractory Materials Co., Ltd., YNS-45.

[0035] The method for preparing an internally braided carbon fiber reinforced crucible includes the following steps:

[0036] (1) Use carbon fiber rope to weave a carbon fiber mesh structure;

[0037] (2) Place the carbon fiber mesh structure in the middle layer of the mold, with a distance control of 10cm between each layer to ensure that the carbon fiber mesh structure is centered, and then pour the refractory material.

[0038] Example 3

[0039] This embodiment provides an internally woven carbon fiber reinforced crucible. The crucible is integral, including a bottom and sidewalls. Both the bottom and sidewalls contain multiple layers of carbon fiber mesh structures 1, which are woven from one or more carbon fiber ropes. The carbon fiber mesh structures 1 in the bottom and sidewalls are integrally woven. The carbon fiber mesh structure 1 has the same shape as the crucible, including one or more carbon fiber ropes radiating outwards from the bottom center and one or more carbon fiber ropes forming a circle. The radiating carbon fiber ropes are spaced above or below the circled carbon fiber ropes, and the radiating carbon fiber ropes and the circled carbon fiber ropes are intersected and densely connected. The carbon fiber mesh structure 1 on the sidewalls includes a first group of carbon fiber ropes 2 and a second group of carbon fiber ropes 3. The carbon fiber ropes forming the first group of carbon fiber ropes 2 are aligned in direction, and the carbon fiber ropes forming the second group of carbon fiber ropes 3 are aligned in direction.

[0040] The density of the carbon fiber mesh structure 1 is 1.8 g / cm³. 3 Its elastic modulus is 280 GPa and its tensile strength is 1300 MPa.

[0041] The outer layer of the crucible is made of refractory material, specifically magnesium aluminate spinel refractory. The magnesium aluminate spinel refractory has an aluminum oxide content of 45–50 wt%, an ferric oxide content ≤1.0 wt%, a refractoriness of 1780℃, and a bulk density of 2.55 g / cm³. 3 Purchased from Zibo Fuming Refractory Materials Co., Ltd., YNS-45.

[0042] The method for preparing an internally braided carbon fiber reinforced crucible includes the following steps:

[0043] (1) Use carbon fiber rope to weave a carbon fiber mesh structure and stack multiple layers of carbon fiber mesh structures together.

[0044] (2) Place the carbon fiber mesh structure in the middle layer of the mold, with a distance control of 10cm between each layer to ensure that the carbon fiber mesh structure is centered, and then pour the refractory material.

[0045] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A crucible reinforced with an internally woven carbon fiber structure, the crucible being a single piece comprising a bottom and sidewalls, characterized in that, The bottom and sidewalls of the crucible are both equipped with carbon fiber mesh structures, which are woven from one or more carbon fiber ropes. The carbon fiber mesh structures in the bottom and sidewalls are integrally woven carbon fiber mesh structures. The carbon fiber mesh structure has the same shape as the crucible, including one or more carbon fiber ropes radiating outward from the bottom center and one or more carbon fiber ropes wrapped in a circle. The one or more carbon fiber ropes radiating outward from the center are spaced above or below the one or more carbon fiber ropes wrapped in a circle. The one or more carbon fiber ropes radiating outward from the bottom center and the one or more carbon fiber ropes wrapped in a circle are intersected and connected in a dense manner. The carbon fiber mesh structure of the sidewall includes a first group of carbon fiber ropes and a second group of carbon fiber ropes. The carbon fiber ropes that make up the first group of carbon fiber ropes are in the same direction, and the carbon fiber ropes that make up the second group of carbon fiber ropes are in the same direction. The density of the carbon fiber mesh structure is 1.8 g / cm³. 3 Its elastic modulus is 280 GPa and its tensile strength is 1300 MPa; The outer layer of the crucible is made of magnesium aluminum spinel refractory material, with an aluminum oxide content of 45-50 wt%, an iron oxide content of ≤1.0 wt%, a refractoriness of 1780℃, and a bulk density of 2.55 g / cm³. 3 ; The preparation method of the crucible reinforced with an internally woven carbon fiber structure includes the following steps: (1) Use carbon fiber rope to weave a carbon fiber mesh structure; (2) Place the carbon fiber mesh structure in the middle layer of the mold, and then pour the refractory material.

2. The internally woven carbon fiber reinforced crucible according to claim 1, characterized in that, The bottom and side walls of the crucible are each provided with one or more layers of carbon fiber mesh structure.

3. The method for preparing the internally woven carbon fiber structure reinforced crucible according to any one of claims 1 to 2, characterized in that, Includes the following steps: (1) Use carbon fiber rope to weave a carbon fiber mesh structure; (2) Place the carbon fiber mesh structure in the middle layer of the mold, and then pour the refractory material.

4. The method for preparing the internally woven carbon fiber structure reinforced crucible according to claim 3, characterized in that, The carbon fiber mesh structure is placed in the middle layer, with a distance control of 10cm intervals to ensure that the carbon fiber mesh structure is centered.

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