High-strength ceramic material and manufacturing process thereof

Abstract

The high-strength ceramic material is prepared from the following raw materials in parts by mass: 50 to 70 parts of silicon carbide, 10 to 20 parts of calcium oxide, 2 to 8 parts of a cosolvent, 1 to 2 parts of potassium oxide, 0.1 to 0.3 part of ferric oxide, 2 to 4 parts of aluminum hydroxide, 0.1 to 0.2 part of cryolite, 5 to 10 parts of quartz sand, 5 to 10 parts of mirabilite, 0.2 to 0.4 part of a reducing agent and 1 to 3 parts of a clarifying agent. Silicon carbide and calcium oxide are used as main raw materials, mirabilite can be used as a clarifying agent, aluminum hydroxide is easy to clarify, and the clarifying agent supported by white arsenic and antimony trioxide is added, so that the discharge of bubbles in the ceramic material is comprehensively promoted, the strength of the ceramic material is greatly improved, and the glossiness is also greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic material manufacturing, in particular to a high-strength ceramic material and a manufacturing process. Background Art

[0002] Ceramic materials are amorphous inorganic non-metallic materials. They are generally made of a variety of inorganic minerals (such as quartz sand, borax, boric acid, barite, barium carbonate, limestone, feldspar, soda ash, etc.) as the main raw materials, and a small amount of auxiliary raw materials are added. Its main components are silicon carbide and other oxides. It is widely used in buildings to block wind and transmit light, and is a mixture. There are also colored ceramic materials that show color by mixing certain metal oxides or salts, and tempered ceramic materials made by physical or chemical methods. Sometimes some transparent plastics (such as polymethyl methacrylate) are also called organic ceramic materials.

[0003] The ceramic materials currently used in general households are not strong enough, especially in the current residential areas with many high-rise buildings. A high-strength ceramic material has a good guarantee for safety. Therefore, an improved technology is urgently needed to solve this problem existing in the prior art. Summary of the invention

[0004] The purpose of the present invention is to provide a high-strength ceramic material and a production process, with silicon carbide and calcium oxide as the main raw materials, Glauber's salt itself can be used as a clarifier, aluminum hydroxide is also easy to clarify, and then a clarifier supported by white arsenic and antimony trioxide is added to comprehensively promote the discharge of bubbles in the ceramic material, greatly improving the strength of the ceramic material while greatly improving the glossiness, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a high-strength ceramic material, which is prepared from the following raw materials in parts by mass: 50-70 parts of silicon carbide, 10-20 parts of calcium oxide, 2-8 parts of solvent, 1-2 parts of potassium oxide, 0.1-0.3 parts of iron oxide, 2-4 parts of aluminum hydroxide, 0.1-0.2 parts of cryolite, 5-10 parts of quartz sand, 5-10 parts of Glauber's salt, 0.2-0.4 parts of reducing agent, and 1-3 parts of clarifier.

[0006] Preferably, it is prepared from the following raw materials in parts by mass: 60 parts of silicon carbide, 15 parts of calcium oxide, 5 parts of solvent, 1 part of potassium oxide, 0.2 parts of iron oxide, 3 parts of aluminum hydroxide, 0.1 parts of cryolite, 7 parts of quartz sand, 7 parts of Glauber's salt, 0.3 parts of reducing agent, and 2 parts of clarifier.

[0007] Preferably, the quartz sand is in the form of 40-60 mesh particles.

[0008] Preferably, the co-solvent is sodium oxide.

[0009] Preferably, the clarifier is prepared by mixing white arsenic and antimony trioxide in a ratio of 1:1.

[0010] Preferably, the reducing agent is carbon powder.

[0011] Preferably, the preparation method comprises the following steps:

[0012] Step 1: Add the raw materials into a mixer according to the proportion and mix and stir to obtain a mixture;

[0013] Step 2: Add the mixture into the melting furnace and raise the temperature in the melting furnace to 1300-1600°C to fully dissolve the mixture to obtain a ceramic material liquid;

[0014] Step 3: introducing the ceramic material liquid into the mold and pressing it into shape by a pressing machine to obtain a semi-finished high-temperature ceramic material;

[0015] Step 4: transport the semi-finished high-temperature ceramic material to a heat preservation machine, set the temperature of the heat preservation machine to 450-500°C, keep warm for 2-3 hours, then cool the temperature by 10-20°C until it cools to room temperature to eliminate or reduce the thermal stress in the ceramic material to an allowable value, and finally obtain the present invention.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] With silicon carbide and calcium oxide as the main raw materials, Glauber's salt itself can be used as a clarifier, and aluminum hydroxide is also easy to clarify. Adding clarifiers supported by white arsenic and antimony trioxide can comprehensively promote the discharge of bubbles in the ceramic material, greatly improving the strength of the ceramic material while also greatly improving the glossiness. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The invention provides a technical solution: a high-strength ceramic material is prepared from the following raw materials in parts by mass: 50-70 parts of silicon carbide, 10-20 parts of calcium oxide, 2-8 parts of a solvent, 1-2 parts of potassium oxide, 0.1-0.3 parts of iron oxide, 2-4 parts of aluminum hydroxide, 0.1-0.2 parts of cryolite, 5-10 parts of quartz sand, 5-10 parts of sodium sulfate, 0.2-0.4 parts of a reducing agent and 1-3 parts of a clarifying agent.

[0020] Embodiment 1:

[0021] A high-strength ceramic material is prepared from the following raw materials in parts by mass: 50 parts of silicon carbide, 10 parts of calcium oxide, 2 parts of flux, 1 part of potassium oxide, 0.1 part of iron oxide, 2 parts of aluminum hydroxide, 0.1 part of cryolite, 5 parts of quartz sand, 5 parts of sodium sulfate, 0.2 part of reducing agent and 1 part of clarifier.

[0022] The manufacturing method of this embodiment includes the following steps:

[0023] Step 1: Add the raw materials into a mixer according to the proportion and mix and stir to obtain a mixture;

[0024] Step 2: Add the mixture into the melting furnace, raise the temperature in the melting furnace to 1500°C, and fully dissolve the mixture to obtain a ceramic material liquid;

[0025] Step 3: introducing the ceramic material liquid into the mold and pressing it into shape by a pressing machine to obtain a semi-finished high-temperature ceramic material;

[0026] Step 4: The semi-finished high-temperature ceramic material is transported to a heat preservation machine. The temperature of the heat preservation machine is now set to 400°C, and the heat preservation is continued for 2 hours. The temperature is then lowered by 10°C until it cools to room temperature to eliminate or reduce the thermal stress in the ceramic material to an allowable value, and finally the present invention is obtained.

[0027] Embodiment 2:

[0028] A high-strength ceramic material is prepared from the following raw materials in parts by mass: 55 parts of silicon carbide, 12 parts of calcium oxide, 3 parts of flux, 1 part of potassium oxide, 0.2 parts of iron oxide, 3 parts of aluminum hydroxide, 0.1 parts of cryolite, 6 parts of quartz sand, 6 parts of sodium sulfate, 0.3 parts of reducing agent and 2 parts of clarifying agent.

[0029] The manufacturing method of this embodiment includes the following steps:

[0030] Step 1: Add the raw materials into a mixer according to the proportion and mix and stir to obtain a mixture;

[0031] Step 2: Add the mixture into the melting furnace, raise the temperature in the melting furnace to 1450°C, and fully dissolve the mixture to obtain a ceramic material liquid;

[0032] Step 3: introducing the ceramic material liquid into the mold and pressing it into shape by a pressing machine to obtain a semi-finished high-temperature ceramic material;

[0033] Step 4: The semi-finished high-temperature ceramic material is transported to a heat preservation machine. The temperature of the heat preservation machine is now set to 450°C and kept warm for 3 hours. The temperature is then lowered by 15°C until it cools to room temperature to eliminate or reduce the thermal stress in the ceramic material to an allowable value, and finally the present invention is obtained.

[0034] Embodiment three:

[0035] A high-strength ceramic material is prepared from the following raw materials in parts by mass: 60 parts of silicon carbide, 15 parts of calcium oxide, 5 parts of flux, 1 part of potassium oxide, 0.2 parts of iron oxide, 3 parts of aluminum hydroxide, 0.1 parts of cryolite, 7 parts of quartz sand, 7 parts of sodium sulfate, 0.3 parts of reducing agent and 2 parts of clarifying agent.

[0036] The manufacturing method of this embodiment includes the following steps:

[0037] Step 1: Add the raw materials into a mixer according to the proportion and mix and stir to obtain a mixture;

[0038] Step 2: Add the mixture into the melting furnace, raise the temperature in the melting furnace to 1500°C, and fully dissolve the mixture to obtain a ceramic material liquid;

[0039] Step 3: introducing the ceramic material liquid into the mold and pressing it into shape by a pressing machine to obtain a semi-finished high-temperature ceramic material;

[0040] Step 4: The semi-finished high-temperature ceramic material is transported to a heat preservation machine. The temperature of the heat preservation machine is now set to 500°C, and the heat preservation is continued for 3 hours. The temperature is then lowered by 15°C until it cools to room temperature to eliminate or reduce the thermal stress in the ceramic material to an allowable value, and finally the present invention is obtained.

[0041] Embodiment 4:

[0042] A high-strength ceramic material is prepared from the following raw materials in parts by mass: 65 parts of silicon carbide, 18 parts of calcium oxide, 7 parts of flux, 2 parts of potassium oxide, 0.3 parts of iron oxide, 3 parts of aluminum hydroxide, 0.2 parts of cryolite, 8 parts of quartz sand, 8 parts of sodium sulfate, 0.4 parts of reducing agent and 3 parts of clarifying agent.

[0043] The manufacturing method of this embodiment includes the following steps:

[0044] Step 1: Add the raw materials into a mixer according to the proportion and mix and stir to obtain a mixture;

[0045] Step 2: Add the mixture into the melting furnace, raise the temperature in the melting furnace to 1550°C, and fully dissolve the mixture to obtain a ceramic material liquid;

[0046] Step 3: introducing the ceramic material liquid into the mold and pressing it into shape by a pressing machine to obtain a semi-finished high-temperature ceramic material;

[0047] Step 4: The semi-finished high-temperature ceramic material is transported to a heat preservation machine. The temperature of the heat preservation machine is now set to 500°C, and the heat preservation is continued for 3 hours. The temperature is then lowered by 20°C until it cools to room temperature to eliminate or reduce the thermal stress in the ceramic material to an allowable value, and finally the present invention is obtained.

[0048] Embodiment five:

[0049] A high-strength ceramic material is prepared from the following raw materials in parts by mass: 70 parts of silicon carbide, 20 parts of calcium oxide, 8 parts of flux, 2 parts of potassium oxide, 0.3 parts of iron oxide, 4 parts of aluminum hydroxide, 0.2 parts of cryolite, 10 parts of quartz, 10 parts of sodium sulfate, 0.4 parts of reducing agent and 3 parts of clarifying agent.

[0050] The manufacturing method of this embodiment includes the following steps:

[0051] Step 1: Add the raw materials into a mixer according to the proportion and mix and stir to obtain a mixture;

[0052] Step 2: Add the mixture into the melting furnace, raise the temperature in the melting furnace to 1500°C, and fully dissolve the mixture to obtain a ceramic material liquid;

[0053] Step 3: introducing the ceramic material liquid into the mold and pressing it into shape by a pressing machine to obtain a semi-finished high-temperature ceramic material;

[0054] Step 4: The semi-finished high-temperature ceramic material is transported to a heat preservation machine. The temperature of the heat preservation machine is now set to 450°C, and the heat preservation is continued for 3 hours. The temperature is then lowered by 20°C until it cools to room temperature to eliminate or reduce the thermal stress in the ceramic material to an allowable value, and finally the present invention is obtained.

[0055] Embodiment six:

[0056] A high-strength ceramic material is prepared from the following raw materials in parts by mass: 60 parts of silicon carbide, 15 parts of calcium oxide, 5 parts of flux, 1 part of potassium oxide, 0.2 parts of iron oxide, 3 parts of aluminum hydroxide, 0.1 parts of cryolite, 7 parts of quartz sand, 7 parts of sodium sulfate, 0.3 parts of reducing agent and 2 parts of clarifying agent.

[0057] The manufacturing method of this embodiment includes the following steps:

[0058] Step 1: Add the raw materials into a mixer according to the proportion and mix and stir to obtain a mixture;

[0059] Step 2: Add the mixture into the melting furnace, raise the temperature in the melting furnace to 1500°C, and fully dissolve the mixture to obtain a ceramic material liquid;

[0060] Step 3: introducing the ceramic material liquid into the mold and pressing it into shape by a pressing machine to obtain a semi-finished high-temperature ceramic material;

[0061] Step 5: The semi-finished high-temperature ceramic material is transported to a heat preservation machine. The temperature of the heat preservation machine is now set to 450°C, and the heat preservation is continued for 2 hours. The temperature is then lowered by 20°C until it cools to room temperature to eliminate or reduce the thermal stress in the ceramic material to an allowable value, and finally the present invention is obtained.

[0062] The high-strength ceramic materials prepared in various embodiments of the present invention were subjected to tests on impact and abrasion resistance, bending strength and glossiness, and the data obtained are as follows:

[0063] Mohs hardness Bending strengthMpa Glossiness Embodiment 1 6.3 102 91 Embodiment 2 6.7 108 94 Embodiment 3 6.9 112 99 Embodiment 4 6.7 107 98 Embodiment 5 6.4 104 99 Embodiment 6 6.8 110 99

[0064] It can be seen from the data in the above table that the high-strength ceramic material prepared in Example 3 can achieve the best performance.

[0065] 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 high-strength ceramic material used in electrical equipment, characterized in that: The invention is prepared from the following raw materials in parts by mass: 50-70 parts of silicon carbide, 10-20 parts of calcium oxide, 2-8 parts of solvent, 1-2 parts of potassium oxide, 0.1-0.3 parts of iron oxide, 2-4 parts of aluminum hydroxide, 0.1-0.2 parts of cryolite, 5-10 parts of quartz sand, 5-10 parts of sodium sulfate, 0.2-0.4 parts of reducing agent and 1-3 parts of clarifying agent.

2. The high-strength ceramic material used in electrical equipment according to claim 1, characterized in that: The product is prepared from the following raw materials in parts by mass: 60 parts of silicon carbide, 15 parts of calcium oxide, 5 parts of solvent, 1 part of potassium oxide, 0.2 parts of iron oxide, 3 parts of aluminum hydroxide, 0.1 parts of cryolite, 7 parts of quartz sand, 7 parts of sodium sulfate, 0.3 parts of reducing agent and 2 parts of clarifier.

3. The high-strength ceramic material used in electrical equipment according to claim 1, characterized in that: The quartz sand is 40-60 mesh particles.

4. The high-strength ceramic material used in electrical equipment according to claim 1, characterized in that: The co-solvent is sodium oxide.

5. The high-strength ceramic material used in electrical equipment according to claim 1, characterized in that: The clarifier is prepared by mixing white arsenic and antimony trioxide in a ratio of 1:

1.

6. The high-strength ceramic material used in electrical equipment according to claim 1, characterized in that: The reducing agent is carbon powder.

7. A method for manufacturing a high-strength ceramic material used in electrical equipment according to claim 1, characterized in that: The following steps are involved: Step 1: Add the raw materials into a mixer according to the proportion and mix and stir to obtain a mixture; Step 2: Add the mixture into the melting furnace and raise the temperature in the melting furnace to 1300-1600°C to fully dissolve the mixture to obtain a ceramic material liquid; Step 3: introducing the ceramic material liquid into the mold and pressing it into shape by a pressing machine to obtain a semi-finished high-temperature ceramic material; Step 4: transport the semi-finished high-temperature ceramic material to a heat preservation machine, set the temperature of the heat preservation machine to 450-500°C, keep warm for 2-3 hours, then cool the temperature by 10-20°C until it cools to room temperature to eliminate or reduce the thermal stress in the ceramic material to an allowable value, and finally obtain the present invention.