Silicon carbide rod with high-temperature anti-oxidation protective coating

Abstract

The utility model provides a silicon carbide rod with a high-temperature antioxidant protective coating, which comprises a silicon carbide rod body, a high-temperature resistant coating is sprayed outside the silicon carbide rod body, the high-temperature resistant coating comprises thermoplastic styrene-butadiene rubber, a polybenzoate coating and an acrylate coating, the thermoplastic styrene-butadiene rubber is sprayed on the outer surface of the silicon carbide rod body, and the polybenzoate coating is coated on the outer surface of the silicon carbide rod body. The polybenzoate coating is sprayed on the outer surface of the thermoplastic styrene-butadiene rubber, the acrylate coating is sprayed on the outer surface of the polybenzoate coating, and the thickness of the thermoplastic styrene-butadiene rubber is smaller than that of the polybenzoate coating and that of the acrylate coating. Through the thermoplastic styrene-butadiene rubber, the polybenzoate coating and the acrylate coating, the thermoplastic styrene-butadiene rubber is arranged on the silicon carbide rod body, the silicon carbide rod body is fully protected when the silicon carbide rod is used, and the polybenzoate coating and the acrylate coating have the advantage of high temperature resistance, so that the high temperature resistance of the base material can be effectively improved when the base material is subjected to high temperature; the service life of the silicon carbide rod body is prolonged.

Description

Technical Field

[0001] The utility model relates to a silicon carbon rod with a high-temperature anti-oxidation protective coating, belonging to the technical field of silicon carbon rods. Background Art

[0002] As a non-metallic high-temperature electric heating element, silicon carbon rod is an important component of heating device and is widely used in various industrial furnaces because of its high temperature resistance, oxidation resistance, corrosion resistance, fast heating, long life, small high temperature deformation, high chemical stability and easy installation and maintenance.

[0003] A Chinese patent publication (publication number: CN 210381350 U) discloses a cylindrical silicon carbon rod related to the field of electric heating element technology. The rod comprises a cylindrical silicon carbon rod body, which is composed of two rods symmetrically arranged along the axis of the rod body and having a semicircular cross-section, with a gap between the two rods. The bottom ends of the two rods are connected by a conductive connector, and the top ends of the two rods are provided with a wiring body, each of which has a wiring through-hole for fixing a power cord. A high-temperature resistant insulating block is installed in the gap between the tops of the two rods, and a high-temperature resistant insulating gasket is provided on the outside of the silicon carbon rod body at a position corresponding to the insulating block. A fixing member for tightening the rod and the insulating block is provided on the outside of the insulating gasket. The cylindrical silicon carbon rod is not only simple to manufacture, occupies a small space, and is strong and durable, but also simpler and more convenient to connect to the power cord.

[0004] However, when used in high-temperature oxidizing environments, silicon carbide rods face oxidation issues. In particular, the reaction with oxygen at high temperatures can cause an oxide layer to form on their surface, affecting their performance and service life. Therefore, in order to improve the service life of silicon carbide rods in high-temperature environments, it is necessary to spray a high-temperature anti-oxidation protective layer on the surface of the silicon carbide rods.

[0005] Therefore, a silicon carbon rod with a high-temperature anti-oxidation protective coating is proposed. Utility Model Content

[0006] In view of this, the present invention provides a silicon carbon rod with a high-temperature anti-oxidation protective coating to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0007] The technical solution of the utility model is achieved as follows: a silicon carbon rod with a high-temperature anti-oxidation protective coating comprises a silicon carbon rod body, the outside of the silicon carbon rod body is sprayed with a high-temperature resistant coating, the high-temperature resistant coating comprises a thermoplastic styrene-butadiene rubber, a polystyrene coating and an acrylate coating, the thermoplastic styrene-butadiene rubber is sprayed on the outer surface of the silicon carbon rod body, the polystyrene coating is sprayed on the outer surface of the thermoplastic styrene-butadiene rubber, and the acrylate coating is sprayed on the outer surface of the polystyrene coating.

[0008] Further preferably, the thickness of the thermoplastic styrene butadiene rubber is smaller than that of the polyphenylene ester coating and the acrylate coating, and the thickness of the thermoplastic styrene butadiene rubber is not less than 20 nm.

[0009] Further preferably, the thickness of the polyphenylene ester coating is greater than the thickness of the thermoplastic styrene-butadiene rubber and less than the thickness of the acrylic ester coating, and the thickness of the polyphenylene ester coating is between 25 nm and 30 nm.

[0010] Further preferably, the thickness of the acrylic coating is greater than that of the thermoplastic styrene-butadiene rubber and polyphenylene ester coatings, and the thickness of the acrylic coating is between 35 nm and 40 nm.

[0011] Further preferably, an anti-oxidation coating is sprayed on the outside of the acrylate coating, and the anti-oxidation coating includes a silicon carbide coating, an aluminum oxide coating and a silicon oxide coating. The silicon carbide coating is sprayed on the outer surface of the acrylate coating, the aluminum oxide coating is sprayed on the outer surface of the silicon carbide coating, and the silicon oxide coating is sprayed on the outer surface of the aluminum oxide coating.

[0012] Further preferably, the thickness of the silicon carbide coating is equal to the thickness of the aluminum oxide coating and is smaller than the thickness of the silicon oxide coating, and the thicknesses of the silicon carbide coating and the aluminum oxide coating are both between 30 nm and 35 nm.

[0013] Further preferably, the thickness of the silicon oxide coating is between 40 nm and 45 nm.

[0014] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution:

[0015] 1. The utility model uses thermoplastic styrene-butadiene rubber, polystyrene coating and acrylic coating. The thermoplastic styrene-butadiene rubber is on the silicon carbon rod body, which fully protects the silicon carbon rod body during use. The polystyrene coating and acrylic coating have the advantage of high temperature resistance, so that when the substrate is subjected to high temperature, the high temperature resistance of the substrate can be effectively improved, thereby extending the service life of the silicon carbon rod body.

[0016] Second, the present invention utilizes a coating of silicon carbide, aluminum oxide, and silicon oxide. Silicon carbide is a high-hardness ceramic material with excellent thermal and chemical stability, thus exhibiting excellent oxidation resistance in high-temperature environments. Aluminum oxide has high hardness and also excellent corrosion and oxidation resistance. In high-temperature environments, the aluminum oxide coating can effectively protect the material from oxidation damage. Silicon oxide has excellent chemical stability and transparency. In the oxidation-resistant coating, silicon oxide can serve as a filler or part of the coating, providing additional protection and repair functions.

[0017] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 This is a schematic diagram of the three-dimensional front view structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the silicon carbon rod body of the present utility model;

[0021] Figure 3 This is a schematic diagram of the high temperature resistant coating structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the anti-oxidation coating structure of the present invention.

[0023] Reference numerals: 1. silicon carbon rod body; 2. high temperature resistant coating; 201. thermoplastic styrene-butadiene rubber; 202. polystyrene coating; 203. acrylate coating; 3. anti-oxidation coating; 301. silicon carbide coating; 302. aluminum oxide coating; 303. silicon oxide coating. DETAILED DESCRIPTION

[0024] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0025] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] Example 1

[0027] like Figure 1-3As shown, the embodiment of the present invention provides a silicon carbon rod with a high-temperature anti-oxidation protective coating. The outside of the silicon carbon rod body 1 is sprayed with a high-temperature resistant coating 2. The high-temperature resistant coating 2 includes a thermoplastic styrene-butadiene rubber 201, a polystyrene coating 202 and an acrylate coating 203. The thermoplastic styrene-butadiene rubber 201 is sprayed on the outer surface of the silicon carbon rod body 1, the polystyrene coating 202 is sprayed on the outer surface of the thermoplastic styrene-butadiene rubber 201, the acrylate coating 203 is sprayed on the outer surface of the polystyrene coating 202, and the thermoplastic styrene-butadiene rubber 201 is sprayed on the outer surface of the silicon carbon rod body 1. 01 has a thickness less than that of the polystyrene coating 202 and the acrylate coating 203, the thickness of the thermoplastic styrene-butadiene rubber 201 is not less than 20 nm, the thickness of the polystyrene coating 202 is greater than the thickness of the thermoplastic styrene-butadiene rubber 201 and less than the thickness of the acrylate coating 203, the thickness of the polystyrene coating 202 is between 25 nm and 30 nm, the thickness of the acrylate coating 203 is greater than that of the thermoplastic styrene-butadiene rubber 201 and the polystyrene coating 202, and the thickness of the acrylate coating 203 is between 35 nm and 40 nm.

[0028] By means of the thermoplastic styrene-butadiene rubber 201, the polystyrene coating 202 and the acrylate coating 203, the thermoplastic styrene-butadiene rubber 201 on the silicon carbon rod body 1 fully protects the silicon carbon rod body 1 during use. The polystyrene coating 202 and the acrylate coating 203 have the advantage of high temperature resistance, which can effectively improve the high temperature resistance of the substrate when subjected to high temperature, thereby extending the service life of the silicon carbon rod body 1.

[0029] Example 2

[0030] like Figure 1 、 Figure 2 and Figure 4 As shown, in one embodiment, the outer side of the acrylate coating 203 is sprayed with an anti-oxidation coating 3, and the anti-oxidation coating 3 includes a silicon carbide coating 301, an aluminum oxide coating 302 and a silicon oxide coating 303. The silicon carbide coating 301 is sprayed on the outer surface of the acrylate coating 203, the aluminum oxide coating 302 is sprayed on the outer surface of the silicon carbide coating 301, and the silicon oxide coating 303 is sprayed on the outer surface of the aluminum oxide coating 302. The thickness of the silicon carbide coating 301 is equal to the thickness of the aluminum oxide coating 302 and is less than the thickness of the silicon oxide coating 303. The thickness of the silicon carbide coating 301 and the aluminum oxide coating 302 are both between 30nm and 35nm, and the thickness of the silicon oxide coating 303 is between 40nm and 45nm.

[0031] Silicon carbide coating 301, aluminum oxide coating 302, and silicon oxide coating 303 are formed. Silicon carbide is a high-hardness ceramic material with excellent thermal and chemical stability, thus exhibiting excellent oxidation resistance in high-temperature environments. Aluminum oxide has high hardness and also excellent corrosion and oxidation resistance. In high-temperature environments, aluminum oxide coating 302 effectively protects the material from oxidation damage. Silicon oxide has excellent chemical stability and transparency. In the oxidation-resistant coating 3, silicon oxide can serve as a filler or part of the coating, providing additional protection and repair functions.

[0032] When the utility model is in operation: first, the surface of the silicon carbon rod body 1 is cleaned and then dried, the surface of the silicon carbon rod body 1 is sprayed with thermoplastic styrene butadiene rubber 201, the silicon carbon rod body 1 is evenly sprayed and covered, and the silicon carbon rod body 1 is placed to cool after covering. After cooling, the surface of the plastic styrene butadiene rubber 201 is sprayed with acrylate coating 203 and polyphenylene ester coating 202. When subjected to high temperature, the temperature is absorbed and reduced. After cooling, the surface of the acrylate coating 203 is sprayed with silicon carbide coating 301. When the silicon carbide coating 301 is used in a high temperature environment, it can greatly reduce the oxidation rate of the silicon carbon rod body 1. Then, the surface of the silicon carbide coating 301 is sprayed with aluminum oxide coating 302 and silicon oxide coating 303. When used in a high temperature environment, the service life of the silicon carbon rod body 1 is extended and a small repair effect is achieved, thereby ensuring the normal use of the silicon carbon rod body 1. The sprayed silicon carbon rod body is dried and cured so that the coating is stably fixed on the surface of the silicon carbon rod body 1.

[0033] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A silicon carbon rod with a high-temperature anti-oxidation protective coating, comprising a silicon carbon rod body (1), characterized in that: The outer surface of the silicon carbon rod body (1) is sprayed with a high-temperature resistant coating (2), and the high-temperature resistant coating (2) comprises a thermoplastic styrene-butadiene rubber (201), a polyphenylene ester coating (202), and an acrylate coating (203). The thermoplastic styrene-butadiene rubber (201) is sprayed on the outer surface of the silicon carbon rod body (1), the polyphenylene ester coating (202) is sprayed on the outer surface of the thermoplastic styrene-butadiene rubber (201), and the acrylate coating (203) is sprayed on the outer surface of the polyphenylene ester coating (202).

2. The silicon carbon rod with a high-temperature anti-oxidation protective coating according to claim 1, characterized in that: The thickness of the thermoplastic styrene-butadiene rubber (201) is smaller than that of the polyphenylene ester coating (202) and the acrylic ester coating (203), and the thickness of the thermoplastic styrene-butadiene rubber (201) is not less than 20 nm.

3. The silicon carbon rod with a high-temperature anti-oxidation protective coating according to claim 2, characterized in that: The thickness of the polyphenylene ester coating (202) is greater than the thickness of the thermoplastic styrene-butadiene rubber (201) and less than the thickness of the acrylic ester coating (203), and the thickness of the polyphenylene ester coating (202) is between 25 nm and 30 nm.

4. The silicon carbon rod with a high-temperature anti-oxidation protective coating according to claim 3, characterized in that: The thickness of the acrylic ester coating (203) is greater than that of the thermoplastic styrene-butadiene rubber (201) and the polyphenylene ester coating (202), and the thickness of the acrylic ester coating (203) is between 35 nm and 40 nm.

5. The silicon carbon rod with a high-temperature anti-oxidation protective coating according to claim 4, characterized in that: The outer side of the acrylate coating (203) is sprayed with an anti-oxidation coating (3), wherein the anti-oxidation coating (3) comprises a silicon carbide coating (301), an aluminum oxide coating (302) and a silicon oxide coating (303), wherein the silicon carbide coating (301) is sprayed on the outer surface of the acrylate coating (203), the aluminum oxide coating (302) is sprayed on the outer surface of the silicon carbide coating (301), and the silicon oxide coating (303) is sprayed on the outer surface of the aluminum oxide coating (302).

6. The silicon carbon rod with a high-temperature anti-oxidation protective coating according to claim 5, characterized in that: The thickness of the silicon carbide coating (301) is equal to the thickness of the aluminum oxide coating (302) and is smaller than the thickness of the silicon oxide coating (303). The thicknesses of the silicon carbide coating (301) and the aluminum oxide coating (302) are both between 30 nm and 35 nm.

7. The silicon carbon rod with a high-temperature anti-oxidation protective coating according to claim 6, characterized in that: The thickness of the silicon oxide coating (303) is between 40 nm and 45 nm.

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