Ceramic flash connection device and method

Abstract

The invention discloses a ceramic flash connection device and method.The connection device comprises a solid heating device used for fixing and conducting current to heat ceramic, the solid heating device is provided with a voltmeter in parallel, one end of the solid heating device is connected with a direct-current power source, and the other end of the solid heating device is connected with a slide rheostat; the other end of the direct-current power supply is connected with one end of the data acquisition and analysis device, and the other end of the data acquisition and analysis device is connected with the infrared thermal imager; the method comprises the following steps of: coating a gap between the spliced ceramic chips with graphite paper, putting the ceramic chips in a solid heating device, connecting one end of the ceramic chips with a negative electrode of a direct-current power supply, and connecting the other end of the ceramic chips with a slide rheostat to form a complete loop; the temperature change and shrinkage condition of the joint of the ceramic chip in each stage of flash connection can be mastered in real time, and the voltage of the solid heating device can be conveniently controlled by adjusting the slide rheostat; according to the invention, the voltage required by the flash connection technology can be more accurately controlled, and the ceramic performance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of connection devices, and in particular to a ceramic flash connection device and method. Background Art

[0002] Ceramics have good mechanical properties and excellent chemical stability. They not only attract much attention in industrial applications, but can also be a cultural relic or even a collectible.

[0003] With the widespread application of ceramic materials, ceramic products have also increased. However, ceramics are hard and brittle. Many broken ceramic pieces will appear in industrial production and application. The broken state of ceramic cultural relics when they are unearthed is a problem that needs to be solved. Inspired by the flash sintering technology, Xia et al. first proposed a new field-induced flash joining (FJ) technology. By applying a DC electric field exceeding the threshold to ion-conductive ceramic materials, the "flash" phenomenon is generated, which can connect ceramic materials in a very short time (seconds). By using the flash connection technology, broken ceramic pieces can be quickly connected, which can effectively reduce the loss of ceramics and greatly improve the efficiency of ceramic cultural relic restoration.

[0004] However, the sintering furnace used in the existing ceramic flash connection technology is not only large in size, but also needs to be heated, which consumes a lot of energy. The equipment operation during use is relatively complicated. Applying the flash connection technology to actual work requires a special connection device. Summary of the invention

[0005] Based on the technical problems existing in the background technology, the present invention proposes a ceramic flash connection device and method, which provides a heat source for the joints of the ceramic sheets through a heat fixing device, and realizes low-temperature rapid connection of the ceramic joints under the auxiliary action of a direct current electric field; the temperature changes and shrinkage of the joints of the ceramic sheets at various stages of flash connection can be realized through an infrared thermal imager and a data acquisition and analysis device, which facilitates adjusting a sliding rheostat to control the voltage of the heat fixing device, and can effectively reduce energy consumption and equipment requirements.

[0006] To achieve the above purpose, the specific technical solutions provided by the present invention are as follows:

[0007] A ceramic flash connection device includes a heat fixing device for fixing and conducting current to heat ceramics, a voltmeter is arranged in parallel with the heat fixing device, one end of the heat fixing device is connected to a DC power supply, and the other end is connected to a sliding rheostat, an ammeter is connected in series between the DC power supply and the sliding rheostat, the other end of the DC power supply is connected to a data acquisition and analysis device, and the other end of the data acquisition and analysis device is connected to an infrared thermal imager.

[0008] The heat fixing device includes a base, with base stoppers A and base stoppers B arranged opposite to each other at two ends of the base, a slider arranged on the base between base stoppers A and base stoppers B, one end of the slider being connected to the base stopper B via a spring, and a fixed pole piece B and a fixed pole piece A being arranged opposite to each other at the other end of the slider and the inner side of the base stopper A, respectively.

[0009] The fixed pole piece A and the fixed pole piece B are made of conductive materials, wherein the fixed pole piece A of the heat fixation device is connected to the negative pole of the DC power supply, and the fixed pole piece B is connected to the sliding rheostat to form a loop.

[0010] The conductive material is a graphite sheet, a copper sheet or an aluminum sheet.

[0011] The fixed electrode piece A and the fixed electrode piece B are made of insulating material and are equipped with two electrode clamps, one of which is connected to the negative pole of the DC power supply, and the other is connected to the sliding rheostat to form a loop.

[0012] The infrared thermal imager is facing the heat fixation device, and the data acquisition frequency of the infrared thermal imager is between 30-60 Hz.

[0013] The base, base stopper A and base stopper B are made of heat-resistant insulating materials.

[0014] The spring is made of stainless steel wire.

[0015] The resistance value of the sliding rheostat is 5-50000Ω.

[0016] A ceramic flash connection method of a ceramic flash connection device comprises the following steps:

[0017] S1. Wrap the spliced ​​ceramic sheets with graphite paper and fix them between the base block A and the slider of the heat fixation device;

[0018] S2, one end of the fixed heat device is connected to the negative pole of the DC power supply, and the other end of the fixed heat device is connected to the sliding rheostat to form a complete circuit;

[0019] S3, directing the infrared thermal imager toward the joint of the ceramic sheet on the heat fixing device, and using the data acquisition and analysis device to collect real-time data;

[0020] S4, set the current density, turn on the DC power supply, adjust the sliding rheostat according to the real-time data collected by the acquisition and analysis device, and turn off the DC power supply after the ceramic sheet is flash-connected.

[0021] The beneficial effects of the present invention are:

[0022] (1) The present invention provides an infrared thermal imager and a data acquisition and analysis device to grasp in real time the temperature change and shrinkage of the joints of the ceramic sheets at each stage of the flash connection, thereby facilitating the voltage of the heat fixing device to be controlled by adjusting the sliding rheostat, more accurately controlling the voltage required for the flash connection technology, and improving the performance of the ceramic after connection.

[0023] (2) The present invention adopts flash connection technology to connect two cultural relic ceramic pieces, which can significantly reduce the connection temperature and shorten the connection time. The connection of the two ceramic pieces can be achieved in seconds. The device has a simple structure and equipment, is easy and quick to use, is safe, and can effectively reduce energy consumption and equipment requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a circuit connection schematic diagram of the present invention;

[0025] Figure 2 It is a schematic diagram of the upper and lower isometric views of the heat fixing device of the present invention;

[0026] Figure 3 It is a top view of the heat fixing device of the present invention.

[0027] Reference numerals: 1. infrared thermal imager; 2. heat fixation device; 3. voltmeter; 4. data acquisition and analysis device; 5. DC power supply; 6. ammeter; 7. sliding rheostat;

[0028] 2-1, base block A; 2-2, fixed pole piece A; 2-3, fixed pole piece B; 2-4, slider; 2-5, spring; 2-6, base block B; 2-7, base. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 The present invention is further described with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] like Figure 1 As shown, a ceramic flash connection device includes an infrared thermal imager 1; a heat fixing device 2; a voltmeter 3; a data acquisition and analysis device 4; a DC power supply 5; an ammeter 6; and a sliding rheostat 7; the heat fixing device 2 is connected in parallel with the voltmeter 3, one end of the heat fixing device 2 is connected to the DC power supply 5, and the other end is connected to the sliding rheostat 7, the ammeter 6 is connected in series between the DC power supply 5 and the sliding rheostat 7, the other end of the DC power supply 5 is connected to one end of the data acquisition and analysis device 4, and the other end of the data acquisition and analysis device 4 is connected to the infrared thermal imager 1.

[0032] like Figure 2 , 3As shown, the heat fixing device 2 includes a base 2-7, and base blocks A2-1 and base blocks B2-6 are relatively arranged at two ends of the base 2-7. A slider 2-4 is arranged on the base 2-7 between the base block A2-1 and the base block B2-6. One end of the slider 2-4 is connected to the base block B2-6 through a spring 2-5, and the other end of the slider 2-4 and the inner side of the base block A2-1 are relatively arranged with a fixed pole piece B2-3 and a fixed pole piece A2-2 respectively. An insulating base 2-7 and a slider 2-4 are designed. The slider 2-4 fixes the ceramic sheet together with the base block A2-1 under the thrust of the spring 2-5 and the base block B2-6.

[0033] The fixed electrode piece A and the fixed electrode piece B of the fixed heat device are made of conductive materials, specifically graphite sheets, copper sheets, aluminum sheets or other conductive metal electrodes.

[0034] The heat fixing device 2 is used to fix and conduct electric current to heat the ceramic sheet. After the spliced ​​ceramic sheet seams are wrapped with graphite paper, they are placed in the heat fixing device 2 and fixed by the base block A2-2 and the slider 2-4. The fixed pole piece A2-2 is connected to the negative pole of the DC power supply 5, and the fixed pole piece B2-3 is connected to the sliding rheostat 7 to form a complete circuit; the infrared thermal imager 1 is facing the ceramic sheet joints on the heat fixing device 2 and is connected to the data acquisition and analysis device 4. The infrared thermal imager 1 and the data acquisition and analysis device 4 can realize the temperature changes and contraction of the ceramic sheet joints at various stages of flash connection, which is convenient for adjusting the sliding rheostat 7 to control the voltage of the heat fixing device 2.

[0035] The base stopper A, the sliding block and the base stopper B of the heat fixing device are made of heat-resistant insulating materials.

[0036] The spring of the heat fixing device is made of stainless steel wire.

[0037] The resistance value of the sliding rheostat is 5-50000Ω.

[0038] The infrared thermal imager and the data acquisition and analysis device are connected via a dedicated data transmission line.

[0039] The data acquisition frequency of the infrared thermal imager is between 30-60 Hz.

[0040] When in use, the jointed ceramic sheets are wrapped with graphite paper strips, the thickness of which is between 0.01-3 mm and the width of which is 5-20 mm on both sides of the joints. After being wrapped, the strips are placed in the heat fixing device 2, the fixed pole piece A2-2 of the heat fixing device 2 is connected to the negative pole of the DC power supply 5, and the fixed pole piece B2-3 is connected to the sliding rheostat 7; then the infrared thermal imager 1 is placed directly opposite the heat fixing device 2 and connected to the data acquisition and analysis device 4, and the temperature change and contraction of the joints of the two ceramic sheets at each stage of the flash connection can be observed in situ, so as to appropriately adjust the sliding rheostat 7 to control the temperature of the ceramic sheets. The voltage of the solid heat device is adjusted; the voltage of the DC power supply 5 is continuously adjustable between 0-2000V, with an accuracy of ±1%, which can meet most ceramic connection requirements; the infrared thermal imager 1 and the data acquisition and analysis device 4 can simultaneously measure the temperature change and size of the ceramic sheet connection seam; the temperature measurement range is from 10℃-3000℃, with an accuracy of ±1℃; the size measurement range is 0-200mm, with an accuracy of ±1mm; the data acquisition and analysis device 4 can display the connection results at the seam, which is convenient for adjusting the sliding rheostat 7 to control the voltage.

[0041] The ceramic flash connection method using a ceramic flash connection device of the present invention comprises the following specific steps:

[0042] 1) After the spliced ​​alumina ceramic sheets are covered with graphite paper, they are placed vertically in the direction of the base 2-7 between the base stopper A2-2 and the slider 2-4 of the heat fixing device 2 for fixing;

[0043] 2) The graphite pole piece A2-2 of the heat fixing device 2 is connected to the negative electrode of the DC power supply 5, and the graphite pole piece B2-3 is connected to the sliding resistor 7;

[0044] 3) The infrared thermal imager 1 is placed directly on the joint of the ceramic sheet on the heat fixing device 2 and connected to the data acquisition and analysis device 4;

[0045] 4) Set the current density to 200mA / mm 2 ;

[0046] 5) Turn on the DC power supply 5. After the ceramic piece is flash-connected, turn off the DC power supply 5 and the flash-connection ends.

[0047] Example 2

[0048] like Figure 1As shown, a ceramic flash connection device includes an infrared thermal imager 1; a heat fixing device 2; a voltmeter 3; a data acquisition and analysis device 4; a DC power supply 5; an ammeter 6; and a sliding rheostat 7; the heat fixing device 2 is connected in parallel with the voltmeter 3, one end of the heat fixing device 2 is connected to the DC power supply 5, and the other end is connected to the sliding rheostat 7, the ammeter 6 is connected in series between the DC power supply 5 and the sliding rheostat 7, the other end of the DC power supply 5 is connected to one end of the data acquisition and analysis device 4, and the other end of the data acquisition and analysis device 4 is connected to the infrared thermal imager 1.

[0049] The heat fixing device 2 includes a base 2-7, at two ends of which a base block A2-1 and a base block B2-6 are arranged opposite to each other, a slider 2-4 is arranged on the base 2-7 between the base block A2-1 and the base block B2-6, one end of the slider 2-4 is connected to the base block B2-6 via a spring 2-5, and a fixed pole piece B2-3 and a fixed pole piece A2-2 are arranged opposite to each other at the other end of the slider 2-4 and the inner side of the base block A2-1, respectively. An insulating base 2-7 and a slider 2-4 are designed, and the slider 2-4 fixes the ceramic sheet together with the base block A2-1 under the thrust of the spring 2-5 and the base block B2-6.

[0050] The fixed pole piece A2-2 and the fixed pole piece B2-3 are made of insulating material and are equipped with two electrode clamps, one of which is connected to the negative pole of the DC power supply 5, and the other is connected to the sliding rheostat 7 to form a loop.

[0051] The heat fixing device 2 is used to fix and conduct electric current to heat the ceramic sheet. After the spliced ​​ceramic sheet seams are wrapped with graphite paper, they are placed in the heat fixing device 2 and fixed by the base block A2-2 and the slider 2-4. Two electrode clamps respectively clamp the two ends of the graphite paper, one electrode clamp is connected to the negative pole of the DC power supply 5, and the other electrode clamp is connected to the sliding rheostat 7 to form a complete circuit; the infrared thermal imager 1 is facing the ceramic sheet joints on the heat fixing device 2 and is connected to the data acquisition and analysis device 4. The infrared thermal imager 1 and the data acquisition and analysis device 4 can realize the temperature changes and contraction of the ceramic sheet joints at various stages of flash connection, which is convenient for adjusting the sliding rheostat 7 to control the voltage of the heat fixing device 2.

[0052] The base stopper A, the sliding block and the base stopper B of the heat fixing device are made of heat-resistant insulating materials.

[0053] The spring of the heat fixing device is made of stainless steel wire.

[0054] The resistance value of the sliding rheostat is 5-50000Ω.

[0055] The infrared thermal imager and the data acquisition and analysis device are connected via a dedicated data transmission line.

[0056] The data acquisition frequency of the infrared thermal imager is adjustable between 30-60 Hz.

[0057] When in use, the jointed ceramic sheets are wrapped with graphite paper strips, the thickness of which is between 0.01 and 3 mm, and the width of which is 5 to 20 mm on both sides of the joints. After being wrapped, the strips are placed in the heat-fixing device 2, one electrode chuck is connected to the negative pole of the DC power supply 5, and the other electrode chuck is connected to the sliding rheostat 7; then the infrared thermal imager 1 is placed facing the heat-fixing device 2 and connected to the data acquisition and analysis device 4, and the temperature change and contraction of the joints of the two ceramic sheets at each stage of the flash connection can be observed in situ, and the sliding rheostat 7 can be appropriately adjusted to control the heat-fixing device. The voltage of the DC power supply 5 is continuously adjustable between 0-2000V with an accuracy of ±1%, which can meet the vast majority of ceramic connection requirements; the infrared thermal imager 1 and the data acquisition and analysis device 4 can simultaneously measure the temperature change and size of the ceramic sheet connection seam; the temperature measurement range is from 10°C to 3000°C with an accuracy of ±1°C; the size measurement range is 0-200mm with an accuracy of ±1mm; the data acquisition and analysis device 4 can display the connection result at the seam, which is convenient for adjusting the sliding rheostat 7 to control the voltage.

[0058] The ceramic flash connection method using a ceramic flash connection device of the present invention comprises the following specific steps:

[0059] 1) After the spliced ​​zirconia ceramic sheets are covered with graphite paper, they are placed parallel to each other between the base block A and the slider of the heat fixing device 2 for fixing;

[0060] 2) Clamp the two ends of the graphite paper with electrode clamps, one electrode clamp is connected to the negative pole of the DC power supply 5, and the other electrode clamp is connected to the sliding rheostat 7;

[0061] 3) The infrared thermal imager 1 is placed directly on the joint of the ceramic sheet on the heat fixing device 2 and connected to the data acquisition and analysis device 4;

[0062] 4) Set the current density to 300mA / mm 2 ;

[0063] 5) Turn on the DC power supply 5. After the ceramic piece is flash-connected, turn off the DC power supply 5 and the flash-connection ends.

Claims

1. A ceramic flash connection device, characterized in that: The invention comprises a heat fixing device (2) for fixing and conducting electric current to heat ceramics, wherein a voltmeter (3) is arranged in parallel with the heat fixing device (2), one end of the heat fixing device (2) is connected to a DC power supply (5), and the other end is connected to a sliding rheostat (7), an ammeter (6) is connected in series between the DC power supply (5) and the sliding rheostat (7), the other end of the DC power supply (5) is connected to a data acquisition and analysis device (4), and the other end of the data acquisition and analysis device (4) is connected to an infrared thermal imager (1).

2. A ceramic flash connection device according to claim 1, characterized in that: The heat fixing device (2) comprises a base (2-7), a base stopper A (2-1) and a base stopper B (2-6) are arranged opposite to each other at two ends of the base (2-7), a slider (2-4) is arranged on the base (2-7) between the base stopper A (2-1) and the base stopper B (2-6), one end of the slider (2-4) is connected to the base stopper B (2-6) via a spring (2-5), and a fixed pole piece B (2-3) and a fixed pole piece A (2-2) are arranged opposite to each other at the other end of the slider (2-4) and the inner side of the base stopper A (2-1).

3. A ceramic flash connection device according to claim 2, characterized in that: The fixed pole piece A (2-2) and the fixed pole piece B (2-3) are made of conductive materials, wherein the fixed pole piece A (2-2) of the heat fixation device (2) is connected to the negative pole of the DC power supply (5), and the fixed pole piece B (2-3) is connected to the sliding rheostat (7) to form a loop.

4. A ceramic flash connection device according to claim 3, characterized in that: The conductive material is a graphite sheet, a copper sheet or an aluminum sheet.

5. A ceramic flash connection device according to claim 2, characterized in that: The fixed electrode piece A (2-2) and the fixed electrode piece B (2-3) are made of insulating material and are equipped with two electrode clamps, one of which is connected to the negative electrode of the DC power supply (5) and the other is connected to the sliding rheostat (7) to form a loop.

6. A ceramic flash connection device according to claim 1, characterized in that: The infrared thermal imager (1) is directly facing the heat fixing device (2), and the data acquisition frequency of the infrared thermal imager (1) is between 30-60 Hz.

7. A ceramic flash connection device according to claim 2, characterized in that: The base (2-7), base stopper A (2-1) and base stopper B (2-6) are made of heat-resistant insulating materials.

8. A ceramic flash connection device according to claim 2, characterized in that: The spring (2-5) is made of stainless steel wire.

9. A ceramic flash connection device according to claim 1, characterized in that: The resistance value of the sliding rheostat (7) is in the range of 5-50000Ω.

10. A ceramic flash connection method based on the device of any one of claims 1 to 9, characterized in that: The following steps are involved: S1, wrapping the spliced ​​ceramic sheets with graphite paper, and placing them between the base stopper A (2-2) and the slider (2-4) of the heat fixing device (2) to fix them; S2, one end of the heat fixing device (2) is connected to the negative electrode of the DC power supply (5), and the other end of the heat fixing device (2) is connected to the sliding rheostat (7), forming a complete circuit; S3, placing the infrared thermal imager (1) directly at the joint of the ceramic sheet on the heat fixing device (2), and using the data collection and analysis device (4) to collect real-time data; S4, setting the current density, connecting the DC power supply (5), adjusting the sliding rheostat (7) according to the real-time data collected by the collection and analysis device (4), and turning off the DC power supply (5) after the ceramic sheet is flash-connected.

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