CN106116559B - A kind of electric field-assisted ceramic low-temp quick-combustion device - Google Patents

A kind of electric field-assisted ceramic low-temp quick-combustion device Download PDF

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CN106116559B
CN106116559B CN201610776999.8A CN201610776999A CN106116559B CN 106116559 B CN106116559 B CN 106116559B CN 201610776999 A CN201610776999 A CN 201610776999A CN 106116559 B CN106116559 B CN 106116559B
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power supply
electric field
heating plate
acquisition device
data acquisition
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CN106116559A (en
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刘金铃
王光
王一光
刘佃光
高燕
安立楠
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Southwest Jiaotong University
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    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
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    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
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    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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Abstract

The invention discloses a kind of electric field-assisted ceramic low-temp quick-combustion devices, including heating plate, DC power supply, infrared camera and data acquisition device；The heating plate is separately connected the positive and negative anodes of DC power supply for placement and heating sample, sample both ends；Heating plate corresponding position is provided with infrared camera, and infrared camera connects data acquisition device；The present invention provides thermal energy by heating plate for ceramics, under the auxiliary of DC electric field, realizes the low temperature Fast Sintering of ceramic material；The variation and linear contraction that each stage specimen temperature of in-situ observation flash burning may be implemented by infrared camera and data acquisition device, significantly reduce the requirement of energy consumption and equipment.

Description

A kind of electric field-assisted ceramic low-temp quick-combustion device
Technical field
The present invention relates to a kind of ceramic low-temp quick-combustion devices, and in particular to a kind of electric field-assisted ceramic low-temp quick-combustion device.
Background technique
Ceramics have the performances such as superior mechanics, electricity, optics, acoustics, magnetics, attract tremendous attention in industrial application, Use scope also increasingly expands；Sintering is an indispensable process of ceramic densifying, this process needs to consume a large amount of Energy, while a series of environmental problems can be caused；In response to energy saving and protection environment call, researcher is continually developed New sintering technology；Such as microwave sintering, HIP sintering, discharge plasma sintering etc.；These sintering methods are not only saved The energy, also improves the performance of material, is made that contribution for the extensive use of material；One is proposed by Rishi Raj within 2010 The new ceramic post sintering method-flash burning of kind；For this sintering method under electric field-assisted, cause is can be realized in ceramic material in a few seconds The furnace temperature of densification, sintering is significantly lower than other sintering methods；Existing flash burning device has the following problems: first is that heating equipment phase To more expensive, it is not easy to popularize；Second is that sintering is carried out in closed furnace body, it is not easy to observation in real time in situ；Third is that existing Some flash burning devices are relatively complicated, are not easy to operate；Fourth is that the rate of heat addition is relatively slow, it is raw to be not easy to quick chemical industry It produces；Fifth is that flash burning device before can only measure the temperature change of a point during flash burning, be not capable of measuring sample part or Bulk temperature distribution.
Summary of the invention
It is simple, convenient, fast that the present invention provides a kind of structures, and the electric field-assisted ceramic low-temp of observation convenient to carry out is burnt fastly Device.
The technical solution adopted by the present invention is that: a kind of electric field-assisted ceramic low-temp quick-combustion device, including heating plate, direct current Source, infrared camera and data acquisition device；The heating plate is separately connected direct current for placement and heating sample, sample both ends The positive and negative anodes in source；Heating plate corresponding position is provided with infrared camera, and infrared camera connects data acquisition device.
Further, the heating plate is arranged on warm table.
Further, the heater plate surface is provided with one layer of 99 alumina wafer.
Further, the sample both ends pass through the positive and negative anodes of high temperature alloy silk connection DC power supply respectively.
Further, the high temperature alloy silk be nichrome wire, memory alloy wire, lectrothermal alloy wire, platinumiridio silk, One of tungsten rhenium alloy wire, Aludirome silk.
Further, voltmeter is connected between the DC power supply and data acquisition device.
Further, ammeter is connected between the DC power supply and data acquisition device.
Further, voltmeter is connected with by data line between the DC power supply and data acquisition device；Directly Ammeter is connected with by data line between galvanic electricity source and data acquisition device.
Further, the infrared camera data acquiring frequency is adjustable between 10-200 Hz.
The beneficial effects of the present invention are:
(1) present invention provides thermal energy by setting heating plate for ceramic post sintering, and ceramics are realized under the auxiliary of DC electric field Low temperature Fast Sintering；
(2) present invention setting infrared camera can be with the variation of each stage specimen temperature of in-situ observation flash burning and linear receipts Contracting；
(3) the configuration of the present invention is simple, easy to use, quick, effectively reduces the requirement of energy consumption and equipment, can be used for ceramics Continuous production.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
In figure: 1- warm table, 2- infrared camera, 3- DC power supply, 4- data acquisition device, 5- sample, 6- heating plate, 7- High temperature alloy silk, 8- ammeter, 9- voltmeter, 10- data line.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
As shown in Figure 1, a kind of electric field-assisted ceramic low-temp quick-combustion device, including heating plate 6, DC power supply 3, infrared camera 2 and data acquisition device 4；For the heating plate 6 for placement and heating sample 5,5 both ends of sample are separately connected DC power supply 3 Positive and negative anodes；6 corresponding position of heating plate is provided with infrared camera 2, and infrared camera 2 connects data acquisition device 4.
In use, providing required temperature by heating plate 6 for the sintering of sample 5, and direct current is formed by external dc power supply 3 Field excitation rapid mass transfer realizes the low temperature quick densifying of ceramic material, and can be observed and be burnt by 2 real-time in-situ of infrared camera Tie each 5 temperature of stage sample and linear contraction；The voltage of DC power supply 3 is continuously adjustable in 0-1000V, and accuracy is ± 0.5%；The electric current of DC power supply 3 is continuously adjusted between 0-30V, and accuracy is ± 0.5%, when can satisfy lot of materials flash burning Requirement to voltage and current；Heating plate 6 can provide sufficiently high temperature for ceramic post sintering, reduce and want to high-temperature service It asks；6 temperature of heating plate is in room temperature to 500oBetween C be continuously adjusted, heating rate is fast, can be completed within ten minutes from room temperature to 500oThe heating of C；The measurement of temperature measurement and ceramic body size can be achieved at the same time in infrared camera 2；Temperature measurement range from 40oC-2500oC, the accuracy of temperature measurement is ± 1oC；Dimensional measurement ranges 0-500mm, the accuracy of dimensional measurement ± 1mm；Data acquisition device 4 can temperature to sample 5 and size carry out real-time display, provide convenience for sintering process；By The display of the snapshots and data acquisition device 4 of infrared camera 2, can observe the linear contraction of sample 5 in real time.
Further, the heating plate 6 is arranged on warm table 1；It is heated up by warm table 1 to heating plate 6.
Further, 6 surface of heating plate is provided with one layer of 99 alumina wafer.
Further, 5 both ends of sample pass through the positive and negative anodes that high temperature alloy silk 7 connects DC power supply 3 respectively.
Further, the high temperature alloy silk 7 is nichrome wire, memory alloy wire, lectrothermal alloy wire, platinumiridio One of silk, tungsten rhenium alloy wire, Aludirome silk.
Further, voltmeter 9 is connected between the DC power supply 3 and data acquisition device 4；Connecting voltmeter 9 can To realize the real-time display to voltage, convenience is provided for sintering process control.
Further, ammeter 8 is connected between the DC power supply 3 and data acquisition device 4；Connecting ammeter 8 can To realize the real-time display to electric current, convenience is provided for sintering process control.
Further, voltmeter is connected with by data line 10 between the DC power supply 3 and data acquisition device 4 9；Ammeter 8 is connected with by data line 10 between DC power supply 3 and data acquisition device 4.
Further, 2 data acquiring frequency of infrared camera is adjustable between 10-200 Hz.
Embodiment 1
La is sintered using apparatus of the present invention0.6Sr0.4Co0.2Fe0.8O3Specific step is as follows for ceramics:
1) both ends of band sample 5 are connected to the positive and negative anodes of DC power supply 3 by high temperature alloy silk 7, then by sample 5 It lies on 99 alumina wafers on 6 surface of heating plate；
2) warm table 1 is set in 300oC is started to warm up, and after reaching set temperature, is kept the temperature 30min, is made the temperature of sample 5 Degree and 1 surface temperature of warm table reach balance；
3) when warm table 1 is kept the temperature, 30V is set by voltage, electric current is set as 7.2A；
4) infrared camera 2, voltmeter 9, ammeter 8 and data acquisition device 4, real-time temperature collection, linear shrinkage, electricity are connected Pressure and current data；
5) it after keeping the temperature 30min, connects DC power supply 3 and keeps the temperature 60s in this case, then after flash burning occurs in sample 5 DC power supply 3, warm table 1 are closed, sintering terminates.
Embodiment 2
La is sintered using apparatus of the present invention0.6Sr0.4Co0.2Fe0.8O3Specific step is as follows for ceramics:
1) both ends of band sample 5 are connected to the positive and negative anodes of DC power supply 3 by high temperature alloy silk 7, then by sample 5 It lies on 99 alumina wafers on 6 surface of heating plate；
2) warm table 1 is set in 200oC is started to warm up, and after reaching set temperature, is kept the temperature 30min, is made the temperature of sample 5 Degree and 1 surface temperature of warm table reach balance；
3) when warm table 1 is kept the temperature, 60V is set by voltage, electric current is set as 7.2A；
4) infrared camera 2, voltmeter 9, ammeter 8 and data acquisition device 4, real-time temperature collection, linear shrinkage, electricity are connected Pressure and current data；
5) it after keeping the temperature 30min, connects DC power supply 3 and keeps the temperature 60s in this case, then after flash burning occurs in sample 5 DC power supply 3, warm table 1 are closed, sintering terminates.
Embodiment 3
Co is sintered using apparatus of the present invention2MnO4Specific step is as follows for ceramics:
1) both ends of band sample 5 are connected to the positive and negative anodes of DC power supply 3 by high temperature alloy silk 7, then by sample 5 It lies on 99 alumina wafers on 6 surface of heating plate；
2) warm table 1 is set in 300oC is started to warm up, and after reaching set temperature, is kept the temperature 30min, is made the temperature of sample 5 Degree and 1 surface temperature of warm table reach balance；
3) when warm table 1 is kept the temperature, 50V is set by voltage, electric current is set as 10A；
4) infrared camera 2, voltmeter 9, ammeter 8 and data acquisition device 4, real-time temperature collection, linear shrinkage, electricity are connected Pressure and current data；
5) it after keeping the temperature 30min, connects DC power supply 3 and keeps the temperature 60s in this case, then after flash burning occurs in sample 5 DC power supply 3, warm table 1 are closed, sintering terminates.
Embodiment 4
La is sintered using apparatus of the present invention0.6Sr0.4Co0.2Fe0.8O3Specific step is as follows for ceramics:
1) both ends of band sample 5 are connected to the positive and negative anodes of DC power supply 3 by high temperature alloy silk 7, then by sample 5 It lies on 99 alumina wafers on 6 surface of heating plate；
2) warm table 1 is set in 200oC is started to warm up, and after reaching set temperature, is kept the temperature 30min, is made the temperature of sample 5 Degree and 1 surface temperature of warm table reach balance；
3) when warm table 1 is kept the temperature, 100V is set by voltage, electric current is set as 10A；
4) infrared camera 2, voltmeter 9, ammeter 8 and data acquisition device 4, real-time temperature collection, linear shrinkage, electricity are connected Pressure and current data；
5) it after keeping the temperature 30min, connects DC power supply 3 and keeps the temperature 60s in this case, then after flash burning occurs in sample 5 DC power supply 3, warm table 1 are closed, sintering terminates.
The present invention provides thermal energy by heating plate 6 for ceramics, under the auxiliary of DC electric field, realizes the low temperature of ceramic material Fast Sintering；Each 5 temperature of stage sample of in-situ observation flash burning may be implemented by infrared camera 2 and data acquisition device 4 Variation and linear contraction, significantly reduce the requirement of energy consumption and equipment, can be used for the continuous production of ceramics.

Claims (7)

1. a kind of electric field-assisted ceramic low-temp quick-combustion device, it is characterised in that: including heating plate (6), DC power supply (3), infrared Camera (2) and data acquisition device (4)；For placement and heating sample (5), sample (5) both ends connect the heating plate (6) respectively Connect the positive and negative anodes of DC power supply (3)；Heating plate (6) corresponding position is provided with infrared camera (2), and infrared camera (2) connects data Acquisition device (4)；The heating plate (6) is arranged on warm table (1)；Heating plate (6) surface is provided with one layer of 99 oxidation Aluminium flake.
2. a kind of electric field-assisted ceramic low-temp quick-combustion device according to claim 1, it is characterised in that: the sample (5) Both ends pass through the positive and negative anodes of high temperature alloy silk (7) connection DC power supply (3) respectively.
3. a kind of electric field-assisted ceramic low-temp quick-combustion device according to claim 2, it is characterised in that: the high temperature alloy Silk (7) is one of nichrome wire, memory alloy wire, platinumiridio silk, tungsten rhenium alloy wire, Aludirome silk.
4. a kind of electric field-assisted ceramic low-temp quick-combustion device according to claim 1, it is characterised in that: the DC power supply (3) it is connected between data acquisition device (4) voltmeter (9).
5. a kind of electric field-assisted ceramic low-temp quick-combustion device according to claim 1, it is characterised in that: the DC power supply (3) it is connected between data acquisition device (4) ammeter (8).
6. a kind of electric field-assisted ceramic low-temp quick-combustion device according to claim 4 or 5, it is characterised in that: the direct current Voltmeter (9) are connected with by data line (10) between power supply (3) and data acquisition device (4)；DC power supply (3) sum number Ammeter (8) are connected with according to data line (10) are passed through between acquisition device (4).
7. a kind of electric field-assisted ceramic low-temp quick-combustion device according to claim 1, it is characterised in that: the infrared camera (2) data acquiring frequency is adjustable between 10-200Hz.
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