Graphite boat for preparing graphene foam

Abstract

The invention relates to the technical field of graphite boats, in particular to a graphite boat for preparing graphene foam, which comprises a total bottom plate, a total cover plate, a porous support rod and a loading area, the total bottom plate comprises a lower support plate, the lower support plate is provided with a lower support plate bolt threaded hole, the total cover plate comprises an upper cover plate, and the upper cover plate is provided with a lower support plate bolt threaded hole. The whole charging area is divided into multiple layers through positioning of the plug pin holes, all the layers are mutually independent, the situation that the density uniformity is affected by overlarge gravity of lower-layer materials in large-batch assembly is prevented, meanwhile, each charging area is matched with a certain pre-expansion area, and therefore the density uniformity is improved. The graphene foam with the needed expansion degree is obtained by adjusting the weight of the upper pressing plate, meanwhile, the surface flatness of the graphene foam can be kept through the existence of the upper pressing plate, and therefore the graphene foam with the flat surface, the high expansion rate and the high heat-conducting property can be obtained through the graphite boat prepared through the scheme.

Description

Technical Field

[0001] The invention relates to the technical field of graphite boats, in particular to a graphite boat for preparing graphene foam. Background Art

[0002] With the development of electronic devices, high-power devices use more and more integrated chips. The manufacturing process of these chips is becoming more and more sophisticated, and the number of transistors contained in a unit is increasing, which causes the heat generated per unit area to increase. In addition, some devices integrate more chips in a limited space. The chips will inevitably generate a lot of heat during operation, so higher requirements are placed on heat dissipation.

[0003] Graphene heat dissipation film is a new type of interface thermal conductive material. It is a two-dimensional crystal composed of a single layer of carbon atoms tightly packed in a hexagonal shape. It has extremely high thermal conductivity. The thermal conductivity of pure, defect-free single-layer graphene is as high as 5000W / mK, which is the highest so far. The thermal conductivity of heat dissipation film with a thickness of more than micron level can reach 1000W / m·S, which is much higher than the relatively high thermal conductivity of various metals such as silver, copper, gold, and aluminum. The excellent thermal conductivity makes graphene an ideal heat dissipation material for ultra-large-scale nano-integrated circuits. The thermal conductivity of low-density graphene foam can also reach more than 50W / m·S. It can completely replace thermal conductive silicone grease or thermal conductive silicone for the bonding of thermal interface materials.

[0004] Graphene foam is made of graphene oxide film through carbonization and graphitization, using carbonization furnace and graphitization furnace, and the loading rack is a graphite boat, but the existing boat adopts a stacking method, and in order to improve the production capacity and product performance, a pressure burning process is adopted. If it is fixed with screws or a thick graphite plate is used to inhibit expansion. The expanded graphene film obtained by this method is hard and has a high density, which greatly limits the use of graphene foam. In order to prepare flexible, low-density graphene foam, not only can the expansion of the graphene film not be suppressed, but also the expansion must be pursued, and at the same time, it cannot expand freely, and the flatness of the surface of the graphene film must be maintained.

[0005] Therefore, the present invention invents a graphite boat of graphene foam, which can use different pressing plates to control the expansion degree according to customer requirements, and use a multi-layer loading area to ensure the consistency of density. Summary of the invention

[0006] The object of the present invention is to provide a graphite boat for preparing graphene foam to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A graphite boat for preparing graphene foam, comprising a main bottom plate, a main cover plate, a porous support rod and a loading area, wherein the main bottom plate comprises a lower support plate, and a lower support plate latch threaded hole is provided on the lower support plate;

[0009] The main cover plate comprises an upper cover plate, the centers of the four side walls of the upper cover plate are all provided with upper cover plate clamp grooves, and upper cover plate support rod screw holes are provided on the end surface of the upper cover plate and correspond to the lower support plate latch screw holes one by one;

[0010] The ends of the porous support rods are threadedly connected with the upper screws of the cover plate, wherein the side walls of the porous support rods are evenly provided with latch holes from top to bottom, the insides of the latch holes are plugged with latches corresponding to the loading areas, the outer walls of the porous support rods are threadedly connected with the lower screws of the cover plate above the latch holes, and the bottom ends of the porous support rods are threadedly connected with the bottom plate screws;

[0011] The loading area is composed of a loading area and a pre-expansion area, and the loading area includes a lower pressure plate of the loading area and an upper pressure plate of the loading area. A plurality of products to be fired and graphite paper are stacked one above the other between the lower pressure plate of the loading area and the upper pressure plate of the loading area, wherein the products to be fired are arranged on the upper surface of the graphite paper.

[0012] As a preferred solution of the present invention, eight porous support rods are provided, wherein the threaded holes of the lower support plate pins and the screw holes of the upper cover plate support rods correspond to the porous support rods, and eight of them are provided respectively, wherein the eight threaded holes of the lower support plate pins are symmetrically arranged in pairs on the lower support plate.

[0013] As a preferred solution of the present invention, the outer wall of the porous support rod and both ends close to the porous support rod are provided with external threads.

[0014] As a preferred solution of the present invention, the two ends of the porous support rod are respectively threadedly connected to the inside of the lower support plate pin threaded hole and the upper cover plate support rod screw hole, and the bottom end of the porous support rod extends through the lower support plate pin threaded hole to the other side of the lower support plate and is threadedly connected to the bottom plate screw, the top end of the porous support rod extends through the upper cover plate support rod screw hole to the other side of the upper cover plate The upper screw of the cover plate is located below the upper cover plate and at the lower screw of the outer wall cover plate of the porous support rod.

[0015] As a preferred solution of the present invention, the main bottom plate, the main cover plate and the porous support rods form a fence-type cylinder, wherein the loading area is provided in multiple groups and is sequentially stacked inside the fence-type cylinder.

[0016] As a preferred solution of the present invention, one end of the latch extends through the latch hole to between the two groups of material areas, and the position of the latch is adjusted to separate the two groups of material areas.

[0017] As a preferred solution of the present invention, one end of the pin extends through the pin hole to between the upper pressure plate in the charging area and the product to be fired. The position of the pin is adjusted to separate the upper pressure plate in the charging area from the product to be fired. The gap formed is the pre-expansion area. The lower pressure plate in the charging area and the upper pressure plate in the charging area are both made of graphite paper.

[0018] As a preferred solution of the present invention, the feeding zone is formed by stacking graphite paper / product to be fired in sequence, which expands during the sintering process, so that the space of the feeding zone becomes larger and the space of the pre-expansion zone becomes smaller.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the present invention, the entire loading area is divided into multiple layers through positioning by pin holes, and each layer is independent of each other to prevent the lower layer of materials from being affected by excessive gravity during large-scale assembly and affecting the uniformity of density. At the same time, each feeding area is equipped with a certain pre-expansion area, and the graphene foam with the required expansion degree can be obtained by adjusting the weight of the upper pressure plate. At the same time, the existence of the upper pressure plate can also maintain the surface flatness of the graphene foam, so that the graphite boat prepared by this scheme is conducive to obtaining graphene foam with a flat surface, a high expansion rate and high thermal conductivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 For the present invention Figure 1 Schematic diagram of some structures;

[0023] Figure 3 For the present invention Figure 2 Schematic diagram of some structures;

[0024] Figure 4 This is a schematic diagram of the porous support rod structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the latch structure of the present invention.

[0026] In the figure: 1. main bottom plate; 2. main cover plate; 3. porous support rod; 4. loading area; 101. lower support plate; 102. threaded hole for pin of lower support plate; 201. upper cover plate; 202. clamp groove of upper cover plate; 203. screw hole for support rod of upper cover plate; 301. upper screw of cover plate; 302. pin hole; 303. pin; 304. lower screw of cover plate; 305. bottom plate screw; 401. feeding area; 402. pre-expansion area; 403. lower pressure plate of loading area; 404. upper pressure plate of loading area; 405. product to be fired; 406. graphite paper. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] For examples, see Figure 1-5 , the present invention provides a technical solution:

[0032] A graphite boat for preparing graphene foam, comprising a main bottom plate 1, a main cover plate 2, a porous support rod 3 and a loading area 4, wherein the main bottom plate 1 comprises a lower support plate 101, and a lower support plate latch threaded hole 102 is provided on the lower support plate 101;

[0033] The main cover plate 2 includes an upper cover plate 201. The centers of the four side walls of the upper cover plate 201 are all provided with upper cover plate clamp grooves 202. Upper cover plate support rod screw holes 203 are provided on the end surface of the upper cover plate 201 and correspond to the lower support plate latch screw holes 102 one by one.

[0034] The end of the porous support rod 3 is threadedly connected with an upper cover screw 301, wherein the side wall of the porous support rod 3 is evenly provided with a latch hole 302 from top to bottom, and a latch 303 is inserted and pulled out inside the latch hole 302 and corresponds to the loading area 4, and the outer wall of the porous support rod 3 and above the latch hole 302 is threadedly connected with a lower cover screw 304, and the bottom end of the porous support rod 3 is threadedly connected with a bottom plate screw 305;

[0035] The loading area 4 is composed of a loading area 401 and a pre-expansion area 402. The loading area 401 includes a lower pressure plate 403 of the loading area and an upper pressure plate 404 of the loading area. A plurality of products to be fired 405 and graphite paper 406 are stacked one above the other between the lower pressure plate 403 of the loading area and the upper pressure plate 404 of the loading area, wherein the products to be fired 405 are arranged on the upper surface of the graphite paper 406.

[0036] As a preferred embodiment of the present invention: eight porous support rods 3 are arranged, wherein the lower support plate pin threaded holes 102 and the upper cover plate support rod screw holes 203 correspond to the porous support rods 3 respectively, and eight are arranged respectively, wherein the eight lower support plate pin threaded holes 102 are symmetrically arranged in pairs on the lower support plate 101.

[0037] As a preferred embodiment of the present invention: the outer wall of the porous support rod 3 and both ends close to the porous support rod 3 are provided with external threads.

[0038] As a preferred embodiment of the present invention: the two ends of the porous support rod 3 are respectively threadedly connected to the lower support plate pin threaded hole 102 and the upper cover plate support rod screw hole 203, and the bottom end of the porous support rod 3 extends through the lower support plate pin threaded hole 102 to the other side of the lower support plate 101 and is threadedly connected with a bottom plate screw 305, and the top end of the porous support rod 3 extends through the upper cover plate support rod screw hole 203 to the other side of the upper cover plate 201 The upper cover plate upper screw 301, the lower outer wall cover plate screw 304 located below the upper cover plate 201 and the porous support rod 3 can be fixed to the main bottom plate 1 and the main cover plate 2 with screws.

[0039] As a preferred embodiment of the present invention: the main bottom plate 1, the main cover plate 2 and the porous support rods 3 form a fence-type cylinder, wherein the loading area 4 is arranged in multiple groups and is stacked in sequence inside the fence-type cylinder.

[0040] As a preferred embodiment of the present invention: one end of the latch 303 extends through the latch hole 302 to between the two groups of material areas 4, and the position of the latch 303 is adjusted to separate the two groups of material areas 4.

[0041] As a preferred embodiment of the present invention: one end of the latch 303 extends through the latch hole 302 to between the upper pressure plate 404 of the charging area and the product to be fired 405, and the position of the latch 303 is adjusted to separate the upper pressure plate 404 of the charging area from the product to be fired 405, and the gap formed is the pre-expansion area 402, and the lower pressure plate 403 of the charging area and the upper pressure plate 404 of the charging area are both made of graphite paper.

[0042] The graphite boat material is graphite; the main bottom plate 1 provides the bottom support function of the entire structure; the lower support plate pin threaded hole 102 and the upper cover plate support rod screw hole can be used to screw the porous support rod 3; the main cover plate 2 provides the function of fixing the porous support rod 3 and providing the lifting function; the upper cover plate clamp groove 202 provides the lifting function;

[0043] As a preferred embodiment of the present invention, the feeding area 401 is formed by stacking graphite paper and the product to be fired in sequence, which expands during the sintering process, so that the space of the feeding area 401 becomes larger and the space of the pre-expansion area 402 becomes smaller.

[0044] The working process of the present invention is as follows: the graphite boat for preparing graphene foam designed by the present invention is composed of four parts: a main bottom plate 1, a main cover plate 2, a porous support rod 3 and a loading area 4. The loading area 4 is divided into multiple areas by a latch 303 on the porous support rod 3, and each area has a feeding area 401 and a pre-expansion area 402. The feeding area 401 uses graphite paper / products to be fired to be stacked in sequence, which expands during the sintering process, and the space of the feeding area 401 becomes larger, while the space of the pre-expansion area 402 becomes smaller, thereby obtaining graphene foam.

[0045] Example 1: A graphite boat with an inner diameter of 320*360mm is prepared, which is surrounded by 8 40mm thick porous support rods, with a gap of 20*10mm, a pin size of 50*10*20mm, a support plate and a cover plate with a size of 320*360*5mm graphite plates, and a total base plate and cover plate thickness of 30mm.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A graphite boat for preparing graphene foam, comprising a main bottom plate (1), a main cover plate (2), a porous support rod (3) and a loading area (4), characterized in that: The main bottom plate (1) comprises a lower support plate (101), and a lower support plate latch threaded hole (102) is provided on the lower support plate (101); The main cover plate (2) comprises an upper cover plate (201), the centers of the four side walls of the upper cover plate (201) are all provided with upper cover plate clamp grooves (202), and upper cover plate support rod screw holes (203) are provided on the end surface of the upper cover plate (201) and correspond one to one with the lower support plate latch threaded holes (102); The end of the porous support rod (3) is threadedly connected to the upper screw (301) of the cover plate, wherein the side wall of the porous support rod (3) is evenly provided with a latch hole (302) from top to bottom, and a latch (303) is inserted and pulled out inside the latch hole (302) and corresponding to the loading area (4), and the outer wall of the porous support rod (3) and located above the latch hole (302) is threadedly connected to the lower screw (304) of the cover plate, and the bottom end of the porous support rod (3) is threadedly connected to the bottom plate screw (305); The loading area (4) is composed of a loading area (401) and a pre-expansion area (402), wherein the loading area (401) includes a loading area lower pressure plate (403) and a loading area upper pressure plate (404), and a plurality of products to be fired (405) and graphite paper (406) are stacked one above the other between the loading area lower pressure plate (403) and the loading area upper pressure plate (404), wherein the products to be fired (405) are arranged on the upper surface of the graphite paper (406).

2. A graphite boat for preparing graphene foam according to claim 1, characterized in that: The multi-hole support rods (3) are provided in eight numbers, wherein the lower support plate pin threaded holes (102) and the upper cover plate support rod screw holes (203) correspond to the multi-hole support rods (3) respectively, and are provided in eight numbers, wherein the eight lower support plate pin threaded holes (102) are symmetrically arranged in pairs on the lower support plate (101).

3. A graphite boat for preparing graphene foam according to claim 2, characterized in that: External threads are provided on the outer wall of the porous support rod (3) and at both ends close to the porous support rod (3).

4. A graphite boat for preparing graphene foam according to claim 3, characterized in that: The two ends of the porous support rod (3) are respectively threadedly connected to the inside of the lower support plate pin threaded hole (102) and the upper cover plate support rod screw hole (203), and the bottom end of the porous support rod (3) extends through the lower support plate pin threaded hole (102) to the other side of the lower support plate (101) and is threadedly connected to the bottom plate screw (305), and the top end of the porous support rod (3) extends through the upper cover plate support rod screw hole (203) to the other side of the upper cover plate (201) The upper cover plate (201) and the outer wall cover plate lower screw (304) is located below the upper cover plate (201) and on the porous support rod (3).

5. A graphite boat for preparing graphene foam according to claim 4, characterized in that: The main bottom plate (1), the main cover plate (2) and the porous support rods (3) form a fence-type cylinder, wherein a plurality of loading areas (4) are arranged and stacked in sequence inside the fence-type cylinder.

6. A graphite boat for preparing graphene foam according to claim 5, characterized in that: One end of the latch (303) extends through the latch hole (302) to between the two groups of material areas (4), and the position of the latch (303) is adjusted to separate the two groups of material areas (4).

7. The graphite boat for preparing graphene foam according to claim 5, characterized in that: One end of the latch (303) extends through the latch hole (302) to between the upper pressing plate (404) of the charging area and the product to be fired (405). The position of the latch (303) is adjusted to separate the upper pressing plate (404) of the charging area from the product to be fired (405). The gap formed is the pre-expansion area (402). The lower pressing plate (403) of the charging area and the upper pressing plate (404) of the charging area are both made of graphite paper.

8. The graphite boat for preparing graphene foam according to claim 7, characterized in that: The feeding area (401) is formed by stacking graphite paper / product to be fired in sequence, which expands during the sintering process, so that the space of the feeding area (401) becomes larger and the space of the pre-expansion area (402) becomes smaller.

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