Method for manufacturing high-temperature-resistant two-dimensional code

Abstract

The invention discloses a method for manufacturing a high-temperature-resistant two-dimensional code. The method comprises the following steps: S1, weighing an aluminum oxide raw material I, and carrying out ball milling to obtain aluminum oxide powder; s2, pressing the prepared aluminum oxide powder into a concave-convex mold with a two-dimensional code pattern shape, and pressing into a module base body; s3, printing ruthenium-based resistance paste on the concave-convex surface of the module substrate, so that the two-dimensional code pattern is uniformly coated with the ruthenium-based resistance paste; s4, weighing an aluminum oxide raw material II to prepare a covering layer; pre-coating interface slurry on one side surface of the covering layer, and covering the concave-convex surface of the module base body with the pre-coated interface slurry to prepare an aluminum oxide ceramic green body; s5, performing hot isostatic pressing sintering on the aluminum oxide ceramic green body to prepare a plurality of aluminum oxide ceramic modules, the covering layer being transparent after sintering, and the ruthenium resistance paste being dark or black after sintering; the aluminum oxide ceramic module manufactured by the method has high strength and high temperature resistance, can be used in a high-temperature scene, and is long in service life.

Description

Technical Field

[0001] The invention belongs to the technical field of alumina ceramic production and relates to a method for producing a high-temperature resistant two-dimensional code. Background Art

[0002] In traditional industries such as steelmaking and casting, steel furnaces are used to hold or transfer molten iron, and their surface temperatures often reach hundreds of degrees Celsius. Labels or signs are installed on the surface of the steel furnace to display the current equipment information of the steel furnace, making it easier for on-site staff to manage and regularly maintain the steel furnace. However, due to the high surface temperature of the steel furnace during use, typical polymer labels will carbonize and become ineffective above 300°C, and metal signs will also deform due to high temperature oxidation. After long-term use, the metal signs will become blurred, making it difficult for staff to use them for subsequent observation. QR codes can cleverly record data information and can be scanned by mobile terminals. The scanned content can be used to manage information and maintain records of the steel furnace. However, there is an urgent need for a high-temperature-resistant QR code to solve the problem of high-temperature intolerance in existing technologies. Summary of the Invention

[0003] In view of the above problems, the present invention proposes a method for producing a high-temperature resistant two-dimensional code, which can effectively solve the problem of high-temperature intolerance in the prior art by preparing an alumina ceramic module with a two-dimensional code.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows: a method for producing a high temperature resistant QR code, comprising the following steps:

[0005] S1. Weighing alumina raw material 1 and ball milling to obtain alumina powder;

[0006] S2, pressing the prepared alumina powder into a concave-convex mold with a QR code pattern, and pressing it into a module matrix;

[0007] S3, printing ruthenium-based resistor paste on the concave and convex surfaces of the module substrate so that the ruthenium-based resistor paste is evenly coated on the QR code pattern;

[0008] S4, weighing alumina raw material 2 to prepare a covering layer; pre-coating one side of the covering layer with interface slurry and then covering it on the concave and convex surface of the module substrate to obtain an alumina ceramic green body;

[0009] S5. Hot isostatic pressing the alumina ceramic green body under an argon environment to produce a plurality of alumina ceramic modules, wherein the cover layer is transparent after sintering, and the ruthenium resistor slurry is dark or black after sintering;

[0010] S6. Multiple alumina ceramic modules can be spliced together to form a complete QR code pattern.

[0011] Furthermore, the alumina raw material 1 contains the following components in percentage by mass: 99.4% Al2O3, 0.1% MgO, and 0.5% Y2O3.

[0012] Furthermore, the preparation process of the aluminum oxide powder in step S1 is as follows:

[0013] S101, weighing and mixing according to the mass percentage of 99.4% Al2O3, 0.1% MgO, and 0.5% Y2O3;

[0014] S102, adding the proportioned raw materials into a ball mill for ball milling;

[0015] S103, adding 0.2-2% by mass of a dispersant and 0.5-5% by mass of a binder to the slurry obtained by ball milling, and adding a certain amount of water so that the material-water mass ratio in the slurry is 0.5:1-2:1, and the slurry viscosity is controlled at 100-300 Pa·s;

[0016] S104, stirring the slurry at 100-500 r / min; finally, drying the stirred slurry to obtain alumina powder.

[0017] Furthermore, the ball milling solvent used in step S102 is deionized water, the ball milling medium is high-purity alumina balls, the ball milling time is 25 to 35 hours, the ball milling speed is 50 to 100 r / min, and the material-water mass ratio is 1:1 to 3:1.

[0018] Furthermore, the ruthenium-based resistor paste in step S3 contains the following components in percentage by mass: 40-50% of RuO2, 25-30% of Bi2O3-B2O3-SiO2 glass powder, and 20-35% of an organic carrier.

[0019] Furthermore, the preparation process of the ruthenium-based resistor slurry is as follows:

[0020] S301, adding a thickener to a main solvent, and adding an organic additive after it is completely dissolved, and then fully dissolving to obtain an organic carrier;

[0021] S302, mixing and dispersing 40-50% of RuO2 and 25-30% of Bi2O3-B2O3-SiO2 glass powder to obtain a mixed powder with good dispersibility;

[0022] S303, adding the obtained mixed powder to 20-35% of an organic carrier, dispersing the mixed powder evenly, and obtaining a ruthenium-based resistor slurry.

[0023] Furthermore, the second alumina powder is high-purity γ-phase Al2O3 powder.

[0024] Furthermore, the preparation process of the covering layer in step S4 is as follows:

[0025] S401, preparing high-purity γ-phase Al2O3 by thermal decomposition of ammonium aluminum sulfate, and pre-calcining it at 1300°C to prepare alumina slurry;

[0026] S402, grinding the alumina slurry until the particles are less than 1 μm, and then injecting the slurry into a mold to form a covering layer.

[0027] Furthermore, the sintering temperature in step S5 is 1400-1600° C., the sintering pressure is 100-200 MPa, and the sintering time is 2-4 hours.

[0028] Furthermore, the interface slurry contains the following components in percentage by mass: 60-80% of Al2O3 powder and 20-40% of Bi2O3-B2O3-SiO2 glass powder.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. In the present invention, alumina powder is sintered into an alumina ceramic module, which has high strength and high temperature resistance and can meet the requirements of high-temperature scenarios in steelmaking furnaces. Ruthenium-based resistor slurry is sintered in the alumina ceramic module. After sintering, the ruthenium-based resistor slurry turns black or dark, and a QR code pattern can be fully displayed in the alumina ceramic module. By scanning the complete QR code pattern, staff can know the equipment information of the steelmaking furnace. The sintered alumina ceramic module has high stability and can be used on the surface of the steelmaking furnace for a long time.

[0031] 2. In the present invention, a covering layer is sintered on the module substrate. The covering layer becomes transparent after sintering, which can protect the two-dimensional code pattern on the module substrate and improve the overall service life. DETAILED DESCRIPTION

[0032] The following is a clear and complete description of 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 making any creative efforts are within the scope of protection of the present invention.

[0033] Example 1

[0034] The present invention proposes a method for producing a high-temperature resistant two-dimensional code, comprising the following steps:

[0035] S1. Weigh 99.4% Al2O3, 0.1% MgO, and 0.5% Y2O3 according to the following mass percentages; then ball mill to obtain alumina powder;

[0036] S2. Pressing the prepared alumina powder into a concave-convex mold with a QR code pattern and pressing it into a module base; so that the raised parts on the module base can form a complete QR code pattern;

[0037] S3, printing ruthenium-based resistor paste on the concave and convex surfaces of the module substrate so that the ruthenium-based resistor paste is evenly coated on the QR code pattern;

[0038] S4. Weigh high-purity (99.99%) γ-phase Al2O3 powder to prepare a covering layer; pre-coat one side of the covering layer with an interface slurry and then cover the concave and convex surface of the module substrate to obtain an alumina ceramic green body;

[0039] S5. Hot isostatic pressing the alumina ceramic green body under an argon environment, wherein the sintering temperature is 1400-1600° C., the sintering pressure is 100-200 MPa, and the sintering time is 2-4 hours to obtain an alumina ceramic module, wherein the cover layer is transparent after sintering, and the ruthenium resistor slurry is dark or black after sintering;

[0040] In this embodiment, the preparation process of the aluminum oxide powder in step S1 is as follows:

[0041] S101, weighing and mixing according to the mass percentage of 99.4% Al2O3, 0.1% MgO, and 0.5% Y2O3;

[0042] S102, adding the proportioned raw materials into a ball mill for ball milling; wherein the ball milling solvent used is deionized water, the ball milling medium is high-purity alumina balls, the ball milling time is 25 to 35 hours, the ball milling speed is 50 to 100 r / min, and the material-water mass ratio is 1:1 to 3:1;

[0043] S103, adding 0.2-2% by mass of a dispersant and 0.5-5% by mass of a binder to the slurry obtained by ball milling, and adding a certain amount of water so that the material-water mass ratio in the slurry is 0.5:1-2:1, and the slurry viscosity is controlled at 100-300 Pa·s;

[0044] S104, stirring the slurry at 100-500 r / min; finally, drying the stirred slurry to obtain alumina powder.

[0045] In this embodiment, after being pressed into a module base, the module base can be degreased by atmospheric degreasing or vacuum degreasing, with a heating rate of 0.2 to 5°C / min, a degreasing temperature of 450 to 1000°C, and a degreasing time of 4 to 10 hours.

[0046] In this embodiment, the ruthenium resistor paste in step S3 contains the following components by mass percentage: 40-50% RuO2, 25-30% Bi2O3-B2O3-SiO2 glass powder, and 20-35% organic vehicle. The preparation process is as follows:

[0047] S301, adding a thickener to a main solvent, and adding an organic additive after it is completely dissolved, and then fully dissolving to obtain an organic carrier;

[0048] S302, mixing and dispersing 40-50% of RuO2 and 25-30% of Bi2O3-B2O3-SiO2 glass powder to obtain a mixed powder with good dispersion;

[0049] S303, adding the obtained mixed powder to 20-35% of an organic carrier, dispersing the mixed powder evenly, and obtaining a ruthenium-based resistor slurry.

[0050] In this embodiment, the process of preparing the covering layer in step S4 is as follows:

[0051] S401, preparing high-purity γ-phase Al2O3 by thermal decomposition of ammonium aluminum sulfate, and pre-calcining it at 1300°C to prepare alumina slurry;

[0052] S402, grinding the alumina slurry until the particles are less than 1 μm, and then injecting the slurry into a mold to form a covering layer.

[0053] In this embodiment, the interface slurry contains the following components in mass percentage: 60-80% Al2O3 powder, 20-40% Bi2O3-B2O3-SiO2 glass powder, which are fully mixed with the organic vehicle to obtain the interface slurry. After sintering, the difference in thermal expansion coefficient between the interface slurry and the module substrate is ≤0.5*10 -6 / ℃. After sintering, the interface slurry sinters the module base and the cover layer into one.

[0054] Through the above-mentioned manufacturing method, the cover layer of the sintered alumina ceramic module is transparent on one side, while the ruthenium resistor paste is dark or black after sintering, so the complete QR code pattern on the module substrate can be clearly seen; the density of the sintered alumina ceramic module is 3.5g / cm 3 , with a temperature resistance of over 1300°C, a Rockwell hardness ≥80HRA, and extremely high wear resistance; it can meet the needs of use in high-temperature scenarios of steelmaking furnaces and can be used for a long time; staff can know the equipment information of the steelmaking furnace by scanning the complete QR code pattern; and the transparent covering layer after sintering also has the performance parameters of alumina ceramics, which can protect the QR code pattern on the module substrate and improve the overall service life.

[0055] Example 2

[0056] The difference from the above embodiment is that: in step S2, multiple module substrates are prepared, and the two-dimensional code patterns on the multiple module substrates can be assembled to form a complete two-dimensional code pattern; therefore, when installing the alumina ceramic module on the steelmaking furnace, multiple alumina ceramic modules are assembled on the steelmaking furnace by splicing, which can reduce the size of the alumina ceramic module and reduce its manufacturing cost and difficulty;

[0057] Furthermore, in this embodiment, when the module base and the covering layer are formed, a dovetail mortise and tenon structure or a serrated structure can be designed between them to reduce the gap between the multiple alumina ceramic modules after assembly, ensuring that the assembled QR code can be stably recognized.

[0058] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for producing a high temperature resistant two-dimensional code, characterized in that: The following steps are involved: S1. Weighing alumina raw material 1 and ball milling to obtain alumina powder; S2, pressing the prepared alumina powder into a concave-convex mold with a QR code pattern, and pressing it into a module matrix; S3, printing ruthenium-based resistor paste on the concave and convex surfaces of the module substrate so that the ruthenium-based resistor paste is evenly coated on the QR code pattern; S4, weighing alumina raw material 2 to prepare a covering layer; pre-coating one side of the covering layer with interface slurry and then covering it on the concave and convex surface of the module substrate to obtain an alumina ceramic green body; S5. Hot isostatic pressing is performed on the alumina ceramic green body to produce a plurality of alumina ceramic modules, wherein the cover layer is transparent after sintering, and the ruthenium resistor slurry is dark or black after sintering; S6. Multiple alumina ceramic modules can be spliced together to form a complete QR code pattern.

2. The method for producing a high-temperature resistant two-dimensional code according to claim 1, wherein: The alumina raw material 1 contains the following components in percentage by mass: 99.4% Al2O3, 0.1% MgO, and 0.5% Y2O3.

3. The method for producing a high-temperature resistant two-dimensional code according to claim 2, wherein: The preparation process of the aluminum oxide powder in step S1 is as follows: S101, weighing and mixing according to the mass percentage of 99.4% Al2O3, 0.1% MgO, and 0.5% Y2O3; S102, adding the proportioned raw materials into a ball mill for ball milling; S103, adding 0.2-2% by mass of a dispersant and 0.5-5% by mass of a binder to the slurry obtained by ball milling, and adding a certain amount of water so that the material-water mass ratio in the slurry is 0.5:1-2:1, and the slurry viscosity is controlled at 100-300 Pa·s; S104, stirring the slurry at 100-500 r / min; finally, drying the stirred slurry to obtain alumina powder.

4. The method for producing a high-temperature resistant two-dimensional code according to claim 3, wherein: The ball milling solvent used in step S102 is deionized water, the ball milling medium is high-purity alumina balls, the ball milling time is 25 to 35 hours, the ball milling speed is 50 to 100 r / min, and the material-water mass ratio is 1:1 to 3:

1.

5. The method for producing a high temperature resistant two-dimensional code according to claim 1, wherein: The ruthenium-based resistor paste in step S3 contains the following components in percentage by mass: 40-50% of RuO2, 25-30% of Bi2O3-B2O3-SiO2 glass powder, and 20-35% of an organic vehicle.

6. The method for producing a high-temperature resistant two-dimensional code according to claim 5, characterized in that: The preparation process of the ruthenium resistor slurry is as follows: S301, adding a thickener to a main solvent, and adding an organic additive after it is completely dissolved, and then fully dissolving to obtain an organic carrier; S302, mixing and dispersing 40-50% of RuO2 and 25-30% of Bi2O3-B2O3-SiO2 glass powder to obtain a mixed powder with good dispersion; S303, adding the obtained mixed powder to 20-35% of an organic carrier, dispersing the mixed powder evenly, and obtaining a ruthenium-based resistor slurry.

7. The method for producing a high temperature resistant two-dimensional code according to claim 1, wherein: The second alumina powder is high-purity γ-phase Al2O3 powder.

8. The method for producing a high temperature resistant two-dimensional code according to claim 7, wherein: The preparation process of the covering layer in step S4 is as follows: S401, preparing high-purity γ-phase Al2O3 by thermal decomposition of ammonium aluminum sulfate, and pre-calcining it at 1300°C to prepare alumina slurry; S402, grinding the alumina slurry until the particles are less than 1 μm, and then injecting the slurry into a mold to form a covering layer.

9. The method for producing a high temperature resistant two-dimensional code according to claim 1, wherein: The sintering temperature in step S5 is 1400-1600° C., the sintering pressure is 100-200 MPa, and the sintering time is 2-4 hours.

10. The method for producing a high temperature resistant two-dimensional code according to claim 1, wherein: The interface slurry contains the following components in percentage by mass: 60-80% of Al2O3 powder and 20-40% of Bi2O3-B2O3-SiO2 glass powder.