CN106116559A - 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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CN106116559A
CN106116559A CN201610776999.8A CN201610776999A CN106116559A CN 106116559 A CN106116559 A CN 106116559A CN 201610776999 A CN201610776999 A CN 201610776999A CN 106116559 A CN106116559 A CN 106116559A
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electric field
combustion device
heating plate
source
infrared camera
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CN106116559B (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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Southwest Jiaotong University
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • 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
    • C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
    • C04B35/2633—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead containing barium, strontium or calcium
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • 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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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/02—Sintering grates or tables
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • 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
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/02—Ohmic resistance heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • 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
    • F27D19/00—Arrangements of controlling devices
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • 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
    • C04B2235/6562—Heating rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • 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
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • 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
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0093—Maintaining a temperature gradient
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2001/00—Composition, conformation or state of the charge
    • F27M2001/03—Charges containing minerals
    • F27M2001/035—China
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2003/00—Type of treatment of the charge
    • F27M2003/04—Sintering

Abstract

The invention discloses a kind of electric field-assisted ceramic low-temp quick-combustion device, including heating plate, DC source, infrared camera and data acquisition unit；Described heating plate is for placing and heating sample, and sample two ends connect the both positive and negative polarity of DC source respectively；Heating plate correspondence position is provided with infrared camera, and infrared camera connects data acquisition unit；The present invention provides heat energy by heating plate for pottery, under the auxiliary of DC electric field, it is achieved the low temperature Fast Sintering of ceramic material；Change and the linear contraction of each stage specimen temperature of in-situ observation flash burning can be realized by infrared camera and data acquisition unit, 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 device, be specifically related to a kind of electric field-assisted ceramic low-temp quick-combustion device.
Background technology
Pottery has the performances such as superior mechanics, electricity, optics, acoustics, magnetics, attracts tremendous attention in commercial Application, its Range the most day by day expands；Sintering is the process that ceramic densifying is indispensable, and this process needs to consume substantial amounts of Energy, can cause series of environmental problems simultaneously；In response to save the energy and the call of protection environment, 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, and the extensively application for material is made that contribution；Within 2010, proposed one by Rishi Raj Plant new ceramic post sintering method-flash burning；This sintering method is under electric field-assisted, and ceramic material can realize causing within several seconds Densification, the furnace temperature of sintering is significantly lower than other sintering methods；Existing flash burning device there is problems in that one is firing equipment phase To costly, it is not easy to popularize；Two sintering are to carry out in closed furnace body, are not easy to real-time monitored in situ；Three is existing Some flash burning devices are relatively complicated, are not easy to operation；Four is that the rate of heat addition is relatively slow, is not easy to rapid industry raw Produce；Five be before flash burning device can only measure the variations in temperature of a point during flash burning, it is impossible to measure sample local or Bulk temperature is distributed.
Summary of the invention
The invention provides a kind of simple in construction, convenient, fast, it is simple to the electric field-assisted ceramic low-temp implementing observation burns soon Device.
The technical solution used in the present invention is: a kind of electric field-assisted ceramic low-temp quick-combustion device, including heating plate, unidirectional current Source, infrared camera and data acquisition unit；Described heating plate is for placing and heating sample, and sample two ends connect unidirectional current respectively The both positive and negative polarity in source；Heating plate correspondence position is provided with infrared camera, and infrared camera connects data acquisition unit.
Further, described heating plate is arranged on warm table.
Further, described heater plate surface is provided with one layer of 99 alumina wafer.
Further, described sample two ends connect the both positive and negative polarity of DC source respectively by high temperature alloy silk.
Further, described high temperature alloy silk be nichrome wire, memory alloy wire, lectrothermal alloy wire, platinumiridio silk, One in tungsten rhenium alloy wire, Aludirome silk.
Further, between described DC source and data acquisition unit, connection has voltmeter.
Further, between described DC source and data acquisition unit, connection has ammeter.
Further, there is voltmeter by data line connection between described DC source and data acquisition unit；Directly Connected by data line between stream power supply and data acquisition unit and have ammeter.
Further, described infrared camera data acquiring frequency is adjustable between 10-200 Hz.
The invention has the beneficial effects as follows:
(1) present invention provides heat energy by arranging heating plate for ceramic post sintering, realizes the low of pottery under the auxiliary of DC electric field Temperature Fast Sintering；
(2) present invention infrared camera is set can be with the change of each stage specimen temperature of in-situ observation flash burning and linear contraction；
(3) present configuration is simple, easy to use, quick, effectively reduces the requirement of energy consumption and equipment, can be used for the company of pottery Continuous metaplasia is produced.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram.
In figure: 1-warm table, 2-infrared camera, 3-DC source, 4-data acquisition unit, 5-sample, 6-heating plate, 7- High temperature alloy silk, 8-ammeter, 9-voltmeter, 10-data line.
Detailed description of the invention
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As it is shown in figure 1, a kind of electric field-assisted ceramic low-temp quick-combustion device, including heating plate 6, DC source 3, infrared camera 2 and data acquisition unit 4；Described heating plate 6 is for placing and heating sample 5, and sample 5 two ends connect DC source 3 respectively Both positive and negative polarity；Heating plate 6 correspondence position is provided with infrared camera 2, and infrared camera 2 connects data acquisition unit 4.
During use, provide temperature required by heating plate 6 for sample 5 sintering, and formed unidirectional current by external dc power supply 3 Field excitation rapid mass transfer, it is achieved the low temperature quick densifying of ceramic material, and can be burnt by the observation of infrared camera 2 real-time in-situ Tie each stage sample 5 temperature and linear contraction；The voltage of DC source 3 at 0-1000V continuously adjustabe, accuracy is ± 0.5%；The electric current of DC source 3 continuously adjustabe between 0-30V, accuracy is ± 0.5%, it is possible to when meeting lot of materials flash burning Requirement to voltage and current；Heating plate 6 can provide sufficiently high temperature for ceramic post sintering, reduces and wants high-temperature service Ask；Heating plate 6 temperature is in room temperature to 500oContinuously adjustabe between C, heating rate is fast, can complete within ten minutes from room temperature to 500oThe intensification of C；Infrared camera 2 can realize temperature survey and the measurement of ceramic body size simultaneously；Temperature measurement range from 40oC-2500oC, thermometric accuracy is ± 1oC；Dimensional measurement ranges 0-500mm, the accuracy of dimensional measurement ± 1mm；The temperature of sample 5 and size can be shown by data acquisition unit 4 in real time, provide convenient for sintering process；By The snapshots of infrared camera 2 and the display of data acquisition unit 4, can be with the linear contraction of real-time monitored sample 5.
Further, described heating plate 6 is arranged on warm table 1；By warm table 1, heating plate 6 is heated up.
Further, described heating plate 6 surface configuration has one layer of 99 alumina wafer.
Further, described sample 5 two ends connect the both positive and negative polarity of DC source 3 respectively by high temperature alloy silk 7.
Further, described high temperature alloy silk 7 is nichrome wire, memory alloy wire, lectrothermal alloy wire, platinumiridio One in silk, tungsten rhenium alloy wire, Aludirome silk.
Further, between described DC source 3 and data acquisition unit 4, connection has voltmeter 9；Connecting voltmeter 9 can To realize the real-time display to voltage, control to provide convenient for sintering process.
Further, between described DC source 3 and data acquisition unit 4, connection has ammeter 8；Connecting ammeter 8 can To realize the real-time display to electric current, control to provide convenient for sintering process.
Further, there is voltmeter by data line 10 connection between described DC source 3 and data acquisition unit 4 9；Connected by data line 10 between DC source 3 and data acquisition unit 4 and have ammeter 8.
Further, described infrared camera 2 data acquiring frequency is adjustable between 10-200 Hz.
Embodiment 1
Use apparatus of the present invention sintering La0.6Sr0.4Co0.2Fe0.8O3Specifically comprising the following steps that of pottery
1) two ends of band sample 5 are connected to by high temperature alloy silk 7 both positive and negative polarity of DC source 3, subsequently sample 5 are kept flat On 99 alumina wafers on heating plate 6 surface；
2) warm table 1 is set in 300oC, starts to warm up, after reaching design temperature, be incubated 30min, make sample 5 temperature and Warm table 1 surface temperature reaches balance；
3) when warm table 1 is incubated, voltage being set to 30V, electric current is set to 7.2A；
4) connect infrared camera 2, voltmeter 9, ammeter 8 and data acquisition unit 4, Real-time Collection temperature, linear shrinkage, voltage and Current data；
5), after insulation 30min, connect DC source 3, after flash burning occurs in sample 5, be incubated 60s in this case, be then turned off DC source 3, warm table 1, sintering terminates.
Embodiment 2
Use apparatus of the present invention sintering La0.6Sr0.4Co0.2Fe0.8O3Specifically comprising the following steps that of pottery
1) two ends of band sample 5 are connected to by high temperature alloy silk 7 both positive and negative polarity of DC source 3, subsequently sample 5 are kept flat On 99 alumina wafers on heating plate 6 surface；
2) warm table 1 is set in 200oC, starts to warm up, after reaching design temperature, be incubated 30min, make sample 5 temperature and Warm table 1 surface temperature reaches balance；
3) when warm table 1 is incubated, voltage being set to 60V, electric current is set to 7.2A；
4) connect infrared camera 2, voltmeter 9, ammeter 8 and data acquisition unit 4, Real-time Collection temperature, linear shrinkage, voltage and Current data；
5), after insulation 30min, connect DC source 3, after flash burning occurs in sample 5, be incubated 60s in this case, be then turned off DC source 3, warm table 1, sintering terminates.
Embodiment 3
Use apparatus of the present invention sintering Co2MnO4Specifically comprising the following steps that of pottery
1) two ends of band sample 5 are connected to by high temperature alloy silk 7 both positive and negative polarity of DC source 3, subsequently sample 5 are kept flat On 99 alumina wafers on heating plate 6 surface；
2) warm table 1 is set in 300oC, starts to warm up, after reaching design temperature, be incubated 30min, make sample 5 temperature and Warm table 1 surface temperature reaches balance；
3) when warm table 1 is incubated, voltage being set to 50V, electric current is set to 10A；
4) connect infrared camera 2, voltmeter 9, ammeter 8 and data acquisition unit 4, Real-time Collection temperature, linear shrinkage, voltage and Current data；
5), after insulation 30min, connect DC source 3, after flash burning occurs in sample 5, be incubated 60s in this case, be then turned off DC source 3, warm table 1, sintering terminates.
Embodiment 4
Use apparatus of the present invention sintering La0.6Sr0.4Co0.2Fe0.8O3Specifically comprising the following steps that of pottery
1) two ends of band sample 5 are connected to by high temperature alloy silk 7 both positive and negative polarity of DC source 3, subsequently sample 5 are kept flat On 99 alumina wafers on heating plate 6 surface；
2) warm table 1 is set in 200oC, starts to warm up, after reaching design temperature, be incubated 30min, make sample 5 temperature and Warm table 1 surface temperature reaches balance；
3) when warm table 1 is incubated, voltage being set to 100V, electric current is set to 10A；
4) connect infrared camera 2, voltmeter 9, ammeter 8 and data acquisition unit 4, Real-time Collection temperature, linear shrinkage, voltage and Current data；
5), after insulation 30min, connect DC source 3, after flash burning occurs in sample 5, be incubated 60s in this case, be then turned off DC source 3, warm table 1, sintering terminates.
The present invention provides heat energy by heating plate 6 for pottery, under the auxiliary of DC electric field, it is achieved the low temperature of ceramic material Fast Sintering；Each stage sample 5 temperature of in-situ observation flash burning can be realized by infrared camera 2 and data acquisition unit 4 Change and linear contraction, significantly reduce the requirement of energy consumption and equipment, can be used for the continuous prodution of pottery.

Claims (9)

1. an electric field-assisted ceramic low-temp quick-combustion device, it is characterised in that: include heating plate (6), DC source (3), infrared Camera (2) and data acquisition unit (4)；Described heating plate (6) is for placing and heating sample (5), and sample (5) two ends connect respectively Connect the both positive and negative polarity of DC source (3)；Heating plate (6) correspondence position is provided with infrared camera (2), and infrared camera (2) connects data Harvester (4).
A kind of electric field-assisted ceramic low-temp quick-combustion device the most according to claim 1, it is characterised in that: described heating plate (6) it is arranged on warm table (1).
A kind of electric field-assisted ceramic low-temp quick-combustion device the most according to claim 1, it is characterised in that: described heating plate (6) surface configuration has one layer of 99 alumina wafer.
A kind of electric field-assisted ceramic low-temp quick-combustion device the most according to claim 1, it is characterised in that: described sample (5) Two ends connect the both positive and negative polarity of DC source (3) respectively by high temperature alloy silk (7).
A kind of electric field-assisted ceramic low-temp quick-combustion device the most according to claim 4, it is characterised in that: described high temperature alloy Silk (7) is in nichrome wire, memory alloy wire, lectrothermal alloy wire, platinumiridio silk, tungsten rhenium alloy wire, Aludirome silk One.
A kind of electric field-assisted ceramic low-temp quick-combustion device the most according to claim 1, it is characterised in that: described DC source (3) and connect between data acquisition unit (4) and have voltmeter (9).
A kind of electric field-assisted ceramic low-temp quick-combustion device the most according to claim 1, it is characterised in that: described DC source (3) and connect between data acquisition unit (4) and have ammeter (8).
8. according to a kind of electric field-assisted ceramic low-temp quick-combustion device described in claim 6 or 7, it is characterised in that: described direct current Connected by data line (10) between power supply (3) and data acquisition unit (4) and have voltmeter (9)；DC source (3) sum Ammeter (8) is had according to being connected by data line (10) between harvester (4).
A kind of electric field-assisted ceramic low-temp quick-combustion device the most according to claim 1, it is characterised in that: described infrared camera (2) data acquiring frequency is adjustable between 10-200Hz.
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Cited By (4)

* Cited by examiner, † Cited by third party
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CN106630974A (en) * 2016-11-25 2017-05-10 中国工程物理研究院材料研究所 Flash sintering method of low-temperature flash sintering ceramic and obtained ceramic and device thereof
CN110357633A (en) * 2019-07-11 2019-10-22 上海交通大学 A kind of method that room temperature quickly prepares titanium aluminium-carbon ceramic
CN110606751A (en) * 2019-09-18 2019-12-24 上海交通大学 Method for graphene-assisted room-temperature flash firing of ceramic material
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