Pretreatment method and device before metallization sintering of new energy ceramic device

Abstract

The invention discloses a pretreatment method and device before metallization sintering of a new energy ceramic device, and relates to the technical field of ceramic metallization. S2, adjusting a heat insulation baffle; s3, product movement control; s4, preheating process and temperature control; and S5, continuously entering a kiln for sintering. According to the continuous kiln, the heating device is installed on the track of the furnace inlet of the continuous kiln, ceramic parts are preheated, it is ensured that no condensate water adheres, surface condensation and impurity adsorption caused by the wet hydrogen atmosphere are avoided, the cleanliness of products and the adhesive force of metal layers are remarkably improved, and cracking or falling is prevented. Meanwhile, due to the direct installation of the pretreatment device, the requirement for extra equipment is avoided, the ceramic device stably and efficiently enters the kiln, stagnation and heat loss are reduced, it is ensured that the ceramic device reaches the ideal temperature when entering the sintering stage, and therefore the overall production efficiency and the product quality are optimized.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic metallization, and in particular to a pretreatment method and device for metallization sintering of new energy ceramic devices. Background Art

[0002] At present, the metallization sintering of new energy ceramic devices in the industry mainly adopts continuous kilns and bell-shaped kilns, and wet hydrogen atmosphere is generally used for sintering. Among them, continuous kilns are widely used due to their high efficiency and good adaptability.

[0003] However, after the ceramic device is coated with the metal layer paste, it enters the kiln in a cold state and comes into contact with water vapor in the wet hydrogen atmosphere, causing condensation. This not only forms water marks on the surface of the ceramic device and the metal layer paste, but also easily absorbs impurities in the kiln, causing black spots and dirt on the ceramic surface. In addition, the water marks evaporate rapidly during the heating process, which may cause the metal layer to crack, thereby affecting the quality and reliability of the product. These problems seriously affect the production efficiency and the qualified rate of the product. Therefore, it is urgent to propose effective solutions to these phenomena. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method and device for pre-treating a new energy ceramic device before metallization sintering, which solves the technical problems mentioned in the background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a pretreatment method for a new energy ceramic device before metallization sintering, comprising the following steps:

[0007] S1. Installation of pretreatment device: Install the ceramic pretreatment device on the continuous kiln inlet track to ensure good docking with the kiln to avoid heat loss;

[0008] S2. Heat insulation baffle adjustment: According to the size of the ceramic device and the height of the tray, adjust the height of the heat insulation baffle at the inlet and outlet of the pretreatment device to ensure that the high temperature resistant tray carrying the ceramic device can pass smoothly while minimizing heat loss;

[0009] S3, product movement control: load the ceramic components onto a high temperature resistant tray, and slowly move them along the preheating device and the kiln through the track system, so that the products are moved at a uniform speed, ensuring that the products stay in the preheating area for a sufficient time;

[0010] S4, preheating process and temperature control: send the ceramic components into the preheating device installed on the kiln entrance track, heat the ceramic components in stages from 100℃ to 150℃, make the ceramic components and the metal layer reach above 100℃, and then gradually reduce the temperature to cool to about 60℃;

[0011] S5. Continuously enter the kiln for sintering: The preheated ceramic components continue to move along the track and gradually enter the continuous kiln for sintering.

[0012] As a further preferred embodiment of the present technical solution, in step S3, the advancement speed of the ceramic device on the track is 200 mm every 15 minutes, and the total advancement time is 75 minutes.

[0013] As a further preferred embodiment of the present technical solution, in step S4, the relative humidity in the device needs to be controlled at 30-40% during the preheating stage.

[0014] As a further preferred embodiment of the present technical solution, in step S4, the specific method of heating the ceramic device in stages at 100° C.-150° C. is as follows:

[0015] Initial drying stage: first heat the ceramic components at 100-120℃ for 30-40 minutes;

[0016] Even temperature drying stage: After the initial drying, the temperature is raised to 140-150°C and kept at this temperature for 30-35 minutes to ensure that the main components of the metal paste are fully dried and the residual trace solvent is evaporated;

[0017] Cooling stage: After the ceramic device has completed uniform temperature drying, the temperature is gradually lowered for 5-10 minutes until the ceramic device and the metal layer reach about 60°C to avoid thermal stress on the ceramic device caused by a sudden drop in temperature.

[0018] The present invention also provides a pretreatment device before metallization sintering of new energy ceramic devices, which is used to implement the above-mentioned pretreatment method, including a device body, a temperature controller, a heating device, an adjustment baffle and a thermocouple;

[0019] The device body, which serves as the framework and support structure of the entire device, has a hollow structure inside;

[0020] The temperature controller is installed above the main body of the device and is electrically connected to the heating device and the thermocouple. The temperature controller receives the temperature feedback signal from the thermocouple and controls the power output of the heating tube according to the set temperature parameters, thereby adjusting the temperature of the device.

[0021] The heating device is installed on the inner wall of the device body. The heating device is electrically connected to the temperature controller and is controlled by the temperature controller to achieve the preset temperature requirement.

[0022] Adjustable heat-insulating baffles, located at the front and rear ends of the inner cavity of the device body, can be adjusted in height or position according to the size of the ceramic device or heating requirements;

[0023] Thermocouples are installed on the inner wall of the device body and are used to monitor the temperature inside the device in real time. The measurement data of the thermocouples is transmitted to the temperature controller, which can adjust the output of the heating tube according to the actual temperature.

[0024] As a further preferred embodiment of the present technical solution, the outer shell specification of the device body is 1000*320*300mm, and the inner cavity size specification is 900*420*350mm.

[0025] As a further preferred embodiment of the present technical solution, the inner wall of the inner cavity of the device body is coated with an alumina ceramic thermal insulation coating.

[0026] As a further preferred embodiment of the present technical solution, the heating device is a heating tube, and two heating tubes are respectively installed on the walls on the left and right sides of the inner cavity of the device body.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention installs a heating device on the inlet track of the continuous kiln, and preheats the ceramic components before entering the metallization kiln to ensure that there is no condensed water on the surface, effectively avoiding the condensation phenomenon of the wet hydrogen atmosphere on the surface of the workpiece, thereby reducing the risk of impurity adsorption and improving the cleanliness of the product;

[0029] 2. During the pretreatment process, since the metal layer paste does not contact condensed water, the adhesion of the metal layer is enhanced, effectively preventing cracking and falling off caused by moisture, making the metallization layer of the ceramic device more stable and improving its overall performance;

[0030] 3. The ceramic pretreatment device is directly installed on the inlet track of the continuous kiln, avoiding the need for additional track equipment installation, saving production space, and allowing ceramic devices to enter the furnace quickly and efficiently without changing tracks or waiting during transportation, thereby reducing stagnation time and heat loss, ensuring that the ceramic devices reach the required temperature when entering the kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic flow chart of the steps of the pretreatment method of the present invention;

[0032] Figure 2 It is one of the structural schematic diagrams of the pretreatment device of the present invention;

[0033] Figure 3The second structural schematic diagram of the pretreatment device of the present invention;

[0034] Figure 4 The third structural schematic diagram of the pretreatment device of the present invention;

[0035] Figure 5 This is the fourth structural schematic diagram of the pretreatment device of the present invention;

[0036] In the figure: 1. device body, 2. temperature controller, 3. adjustable heat insulation baffle, 4. heating tube, 5. thermocouple. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings of the specification. 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 creative work are within the scope of protection of the present invention.

[0038] Embodiment 1

[0039] See also Figure 1 In this embodiment, a pretreatment method for a new energy ceramic device before metallization sintering includes the following steps:

[0040] S1. Installation of pretreatment device: Install the ceramic pretreatment device on the continuous kiln inlet track to ensure good docking with the kiln to avoid heat loss;

[0041] S2. Heat insulation baffle adjustment: According to the size of the ceramic device and the height of the tray, adjust the height of the heat insulation baffle at the inlet and outlet of the pretreatment device to ensure that the high temperature resistant tray carrying the ceramic device can pass smoothly while minimizing heat loss;

[0042] S3. Product movement control: Load the ceramic components onto a high temperature resistant tray and slowly move them along the preheating device and the kiln through a track system to advance the products at a uniform speed, ensuring that the products stay in the preheating zone for a sufficient time. Uniform advancement can ensure that each ceramic component obtains the same preheating conditions, thus improving the consistency of product quality.

[0043] S4, preheating process and temperature control: send the ceramic components into the preheating device installed on the kiln entrance track, heat the ceramic components in stages from 100℃ to 150℃, make the ceramic components and the metal layer reach above 100℃, and then gradually reduce the temperature to cool to about 60℃;

[0044] S5. Continuously enter the kiln for sintering: The preheated ceramic components continue to move along the track and gradually enter the continuous kiln for sintering. The preheated ceramic components can smoothly enter the kiln for sintering, reducing the impact of sudden temperature changes and entering the sintering stage in the best state, which helps to improve the uniformity of the sintering process and product quality, and enhance the strength and performance of the final product.

[0045] Furthermore, in step S3, the ceramic device is advanced on the track at a speed of 200 mm every 15 minutes, and the total advancement time is 75 minutes.

[0046] Furthermore, in step S4, the relative humidity in the device needs to be controlled at 30-40% during the preheating stage.

[0047] Furthermore, in step S4, the specific method of heating the ceramic component in stages at 100° C.-150° C. is as follows:

[0048] Initial drying stage: The ceramic components are first heated at 100-120°C for 30-40 minutes. Initial heating can effectively remove moisture from the surface of the ceramic components, reduce the impact of moisture on subsequent drying and sintering, and lay the foundation for the subsequent drying of the metal paste, ensuring that it can effectively adhere in subsequent processes, reduce residual solvents in the ceramic components, and avoid bubbles or cracks caused by volatilization in the subsequent stages.

[0049] Uniform temperature drying stage: After the initial drying, the temperature is raised to 140-150°C and kept warm for 30-35 minutes to ensure that the main components of the metal paste are fully dried and the residual trace solvent is evaporated; the higher temperature ensures that the main components of the metal paste are fully dried, improves its adhesion and durability, evaporates the residual solvent, and reduces the risk of defects in the subsequent sintering process.

[0050] Cooling stage: After the ceramic device is dried at an even temperature, the temperature is gradually lowered for 5-10 minutes until the ceramic device and the metal layer reach about 60°C to avoid thermal stress on the ceramic device caused by a sudden drop in temperature. Slow cooling can effectively prevent thermal stress caused by a sudden drop in temperature, reduce the risk of cracking of the ceramic device, ensure a stronger bond between the metal layer and the ceramic, and reduce the risk of peeling or falling off.

[0051] Through the above steps and specific methods, the reasonable design of the pretreatment device, the adjustment of the heat insulation baffle and the control of the movement of the ceramic components have significantly improved the thermal efficiency and production efficiency, ensured uniform heating, and reduced the risk of thermal stress and product defects. In addition, the staged heating and appropriate humidity control effectively improved the quality of the metal layer and ensured that the ceramic components were in the best condition when entering the sintering stage.

[0052] Embodiment 2

[0053] See also Figure 2-5 In this embodiment, a pretreatment device for new energy ceramic devices before metallization sintering is used to implement the pretreatment method of the first embodiment, including a device body, a temperature controller, a heating device, an adjustment baffle and a thermocouple;

[0054] The device body, which serves as the framework and support structure of the entire device, has a hollow structure inside;

[0055] The temperature controller is installed above the main body of the device and is electrically connected to the heating device and the thermocouple. The temperature controller receives the temperature feedback signal from the thermocouple and controls the power output of the heating tube according to the set temperature parameters, thereby adjusting the temperature of the device.

[0056] The heating device is installed on the inner wall of the device body. The heating device is electrically connected to the temperature controller and is controlled by the temperature controller to achieve the preset temperature requirement.

[0057] Adjustable heat-insulating baffles, located at the front and rear ends of the inner cavity of the device body, can be adjusted in height or position according to the size of the ceramic device or heating requirements;

[0058] Thermocouples are installed on the inner wall of the device body and are used to monitor the temperature inside the device in real time. The measurement data of the thermocouples is transmitted to the temperature controller, which can adjust the output of the heating tube according to the actual temperature.

[0059] The pretreatment device achieves efficient and uniform heating through real-time monitoring and feedback control of the temperature controller and thermocouple, ensuring that the ceramic device obtains sufficient heat distribution. At the same time, the adjustable heat insulation baffle and the alumina ceramic insulation coating in the inner cavity improve the adaptability and thermal efficiency of the device, enhance the stability and durability of the structure, thereby significantly improving the pretreatment effect of the ceramic device and laying the foundation for the quality and efficiency of the subsequent sintering process.

[0060] Furthermore, the outer shell of the device body has a specification of 1000*320*300mm, and the inner cavity size is 900*420*350mm.

[0061] Furthermore, the inner wall of the inner cavity of the device body is coated with an alumina ceramic thermal insulation coating. The application of the alumina ceramic thermal insulation coating improves the thermal efficiency and durability of the device and provides a more reliable guarantee for the pretreatment of ceramic devices.

[0062] Furthermore, the heating device is a heating tube, and two heating tubes are installed on the walls on the left and right sides of the inner cavity of the device body. The inner cavity of the device body is equipped with two heating tubes on the left and right sides. This design can achieve uniform heating, improve heating efficiency, and enhance the flexibility of temperature control and system reliability. In addition, the multi-heating tube configuration can adapt to ceramic devices of different sizes and thermal requirements, providing an efficient and reliable solution for pretreatment before metallization sintering.

[0063] 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 pretreatment method for new energy ceramic devices before metallization sintering, characterized in that: The following steps are involved: S1. Installation of pretreatment device: Install the ceramic pretreatment device on the continuous kiln inlet track to ensure good connection with the kiln to avoid heat loss; S2. Heat insulation baffle adjustment: According to the size of the ceramic device and the height of the tray, adjust the height of the heat insulation baffle at the inlet and outlet of the pretreatment device to ensure that the high temperature resistant tray carrying the ceramic device can pass smoothly while minimizing heat loss; S3, product movement control: load the ceramic components onto a high temperature resistant tray, and slowly move them along the preheating device and the kiln through the track system, so that the products are moved at a uniform speed, ensuring that the products stay in the preheating area for a sufficient time; S4, preheating process and temperature control: send the ceramic components into the preheating device installed on the kiln entrance track, heat the ceramic components in stages from 100℃ to 150℃, make the ceramic components and the metal layer reach above 100℃, and then gradually reduce the temperature to about 60℃; S5. Continuously enter the kiln for sintering: The preheated ceramic components continue to move along the track and gradually enter the continuous kiln for sintering.

2. A new energy ceramic device metallization sintering pre-treatment method according to claim 1, characterized in that: In step S3, the ceramic component is advanced on the track at a speed of 200 mm every 15 minutes, and the total advancement time is 75 minutes.

3. A new energy ceramic device metallization sintering pretreatment method according to claim 1, characterized in that: In step S4, the relative humidity in the device needs to be controlled at 30-40% during the preheating stage.

4. A new energy ceramic device metallization sintering pretreatment method according to claim 1, characterized in that: In step S4, the specific method of heating the ceramic component in stages at 100° C.-150° C. is as follows: Initial drying stage: first heat the ceramic components at 100-120℃ for 30-40 minutes; Even temperature drying stage: After the initial drying, the temperature is raised to 140-150°C and kept at this temperature for 30-35 minutes to ensure that the main components of the metal paste are fully dried and the residual trace solvent is evaporated; Cooling stage: After the ceramic device has completed uniform temperature drying, the temperature is gradually lowered for 5-10 minutes until the ceramic device and the metal layer reach about 60°C to avoid thermal stress on the ceramic device caused by a sudden drop in temperature.

5. A pretreatment device for new energy ceramic devices before metallization sintering, used to implement the pretreatment method according to any one of claims 1 to 4, characterized in that: It includes a device body, a temperature controller, a heating device, an adjustment baffle and a thermocouple; The device body, which serves as the framework and support structure of the entire device, has a hollow structure inside; The temperature controller is installed above the main body of the device and is electrically connected to the heating device and the thermocouple. The temperature controller receives the temperature feedback signal from the thermocouple and controls the power output of the heating tube according to the set temperature parameters, thereby adjusting the temperature of the device. The heating device is installed on the inner wall of the device body. The heating device is electrically connected to the temperature controller and is controlled by the temperature controller to achieve the preset temperature requirement. Adjustable heat-insulating baffles, located at the front and rear ends of the inner cavity of the device body, can be adjusted in height or position according to the size of the ceramic device or heating requirements; Thermocouples are installed on the inner wall of the device body and are used to monitor the temperature inside the device in real time. The measurement data of the thermocouples is transmitted to the temperature controller, which can adjust the output of the heating tube according to the actual temperature.

6. The metallization sintering pre-treatment device for new energy ceramic devices according to claim 5 is characterized in that: The main shell specifications of the device are 1000*320*300mm, and the inner cavity size specifications are 900*420*350mm.

7. The new energy ceramic device metallization sintering pre-treatment device according to claim 5 is characterized in that: The inner wall of the inner cavity of the device body is coated with an alumina ceramic thermal insulation coating.

8. The new energy ceramic device metallization sintering pre-treatment device according to claim 5 is characterized in that: The heating device is a heating tube, and two heating tubes are respectively installed on the walls on the left and right sides of the inner cavity of the device body.

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