CN109942303A - A kind of flash burning molding method for preparing of ceramic crystal - Google Patents
A kind of flash burning molding method for preparing of ceramic crystal Download PDFInfo
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- CN109942303A CN109942303A CN201910323444.1A CN201910323444A CN109942303A CN 109942303 A CN109942303 A CN 109942303A CN 201910323444 A CN201910323444 A CN 201910323444A CN 109942303 A CN109942303 A CN 109942303A
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- flash burning
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- ceramic crystal
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Abstract
The present invention relates to a kind of flash burning molding method for preparing of ceramic crystal, it does not need to advance with dry-pressing, cold pressing or the tape casting and prepares green compact, production procedure is thus significantly simplified, smooth processing is carried out to mold, shape of product and size can be more precisely controlled, to make flash burning technology have the basis of industrial applications, auxiliary heating of the invention provides various ways, material can be fast and accurately heated to the critical-temperature of flash burning, the equilibrium temperature that certain time is kept after reaching critical-temperature, improves the stability of sintering process and the efficiency of flash burning.
Description
Technical field
The invention belongs to high brilliant Material Field more particularly to a kind of flash burning molding method for preparing of ceramic crystal.
Background technique
Ceramic material is a kind of important industrial materials, different ceramics have different mechanics, electricity, optics, acoustics,
The performances such as magnetics, thus there is colourful application, become the indispensable important materials of modern society.The system of ceramic material
Standby technique is varied, generally uses molding-sintering-mechanical processing technique process.Sintering be in ceramic material preparation process most
For an important process, it is the important link for feeling material property.In traditional high-sintering process, it needs to disappear
The a large amount of energy is consumed, may cause serious environmental problem.For energy saving, protection environment, many novel sintered technology quilts
It developed, such as the sintering of microwave sintering, HIP sintering, discharge plasma.These new technologies different fields all
There is application, is made that significant contribution for the development of ceramic material.Flash burning technology can realize the densification of ceramics in a few seconds
Process, while sintering temperature is greatly reduced, thus there is the advantages of high-efficient, low energy consumption.Many researchers phase on this basis
After proposing various agglomerating plant based on flash burning principle.
In existing flash burning forming method, how material to be fast and accurately heated to the critical-temperature of flash burning, then reach
By how to keep after critical-temperature, the efficiency of its stability and flash burning how is improved, is still a problem to be solved.
Summary of the invention
In view of the above, the present invention exactly against the above technical problems, provides a kind of flash burning molding of ceramic crystal
Preparation method.
A kind of flash burning molding method for preparing of ceramic crystal, comprising the following steps:
S1, which pours raw material into, is pressed into bone-shaped material in bone-shaped mold, and carries out smooth processing to surface；
Mold is put into the sintering zone of flash burning equipment by S2, applies 40-50MPa pressure using upper and lower ends pressure head, and make bone-shaped
Material is in heating zone middle position, and mold is connected into the circuit of high voltage direct current flash burning power supply.
S3 open auxiliary heating power supply, with the speed of 160 DEG C/min-200 DEG C/min be heated to 1000 DEG C ~ 1200 DEG C or
Until phosphere occurs；
S4 opens high voltage direct current flash burning power supply, in mold two sides and passes to direct current, linearly increasing voltage 200V/cm, until hair
Raw flash burning phenomenon；
S5 control electric current is down to 1000A-1200A, constant current；Continue 15~20s；
S6 is cooled to room temperature, obtains fine and close sintered body；
S7 is polished directly sintered body surface, obtains required product.
A kind of flash burning molding method for preparing of ceramic crystal provided by the invention can be further arranged to auxiliary heating power supply
For induction auxiliary heating.
A kind of flash burning molding method for preparing of ceramic crystal provided by the invention can be further arranged to auxiliary heating power supply
For Microwave-assisted firing.
A kind of flash burning molding method for preparing of ceramic crystal provided by the invention can be further arranged to auxiliary heating power supply
For the heating of infrared auxiliary.
It is composite oxygen that a kind of flash burning molding method for preparing of ceramic crystal provided by the invention, which can be further arranged to raw material,
Change zirconium pelletizing or mixed rare-earth oxide pelletizing.
A kind of flash burning molding method for preparing of ceramic crystal provided by the invention can be further arranged to the high straightening in S4
It flows flash burning power supply instantaneous output power and is greater than 2000kW.
A kind of flash burning molding method for preparing of ceramic crystal provided by the invention can be further arranged to S6 temperature-fall period and hold
The continuous time is 45-60min.
A kind of flash burning molding method for preparing of ceramic crystal provided by the invention can be further arranged in S3 heating process
In, heating zone internal temperature is monitored in real time.
It in the present invention, does not need to advance with dry-pressing, cold pressing or the tape casting and prepares green compact, thus significantly simplified production stream
Journey carries out smooth processing to mold, shape of product and size can be more precisely controlled, so that flash burning technology be made to have work
The basis of industryization application, auxiliary heating of the invention provide various ways, material fast and accurately can be heated to flash burning
Critical-temperature keeps the equilibrium temperature of certain time after reaching critical-temperature, improves the stability and flash burning of sintering process
Efficiency.
Specific embodiment
A kind of flash burning molding method for preparing embodiment of ceramic crystal of the present invention is described further.
A kind of flash burning molding method for preparing of ceramic crystal, comprising the following steps:
S1, which pours raw material into, is pressed into bone-shaped material in bone-shaped mold, and carries out smooth processing to surface；
Mold is put into the sintering zone of flash burning equipment by S2, applies 40-50MPa pressure using upper and lower ends pressure head, and make bone-shaped
Material is in heating zone middle position, and mold is connected into the circuit of high voltage direct current flash burning power supply.
S3 open auxiliary heating power supply, with the speed of 160 DEG C/min-200 DEG C/min be heated to 1000 DEG C ~ 1200 DEG C or
Until phosphere occurs；
S4 opens high voltage direct current flash burning power supply, in mold two sides and passes to direct current, linearly increasing voltage 200V/cm, until hair
Raw flash burning phenomenon；
S5 control electric current is down to 1000A-1200A, constant current；Continue 15~20s；
S6 is cooled to room temperature, obtains fine and close sintered body；
S7 is polished directly sintered body surface, obtains required product.
Assisting heating power supply is that the heating of induction auxiliary, Microwave-assisted firing or infrared auxiliary heat three kinds of modes, is adapted to more
Kind different situations.The mode that induction auxiliary is heated to be magnetic induction heating treats agglomerated material and carries out internal heating, and heating speed is fast,
Precisely, raw material internal temperature is uniform for temperature control, can be widely used in the sintering process for preparing high-performance crystalline material, obtain
Crystal phase tissue more better than conventional sintering, performance are more outstanding；Infrared auxiliary is heated to be to be treated by the way of infrared heating
Agglomerated material carries out internal heating, and heating distance is remote, and heating speed is fast, and precisely, raw material internal temperature is uniform for temperature control；Microwave
Auxiliary, which is heated to be by the way of microwave heating, treats the internal heating of agglomerated material progress, does not need heat-conduction medium, heating speed
Degree is fast, and raw material internal temperature is uniform, and capacity usage ratio is high.
Raw material be compound zirconia pelletizing or mixed rare-earth oxide pelletizing, zirconium oxide chemical property torpescence, and
Property with high-melting-point, high resistivity, high refractive index and low thermal coefficient of expansion makes it important heat-resisting material, pottery
Porcelain insulating material and ceramic opacifier, are the primary raw materials manually bored.Band gap is about 5-7eV, guarantees the purity of product.
High voltage direct current flash burning power supply instantaneous output power in S4 is greater than 2000kW, and high voltage generates high power and guarantees moment
Puncture the material in mold, improves the efficiency of flash burning.
The S6 temperature-fall period duration is 45-60min, and enough temperature fall times can reduce product because temperature change is acute
Internal structure is uneven caused by strong, and temperature-fall period will accomplish uniform decrease in temperature in longer time, should also carry out heat preservation work
Make, declines temperature uniformly.
In S3 heating process, heating zone internal temperature is monitored in real time, accomplishes more accurate temperature control.
It in the present invention, does not need to advance with dry-pressing, cold pressing or the tape casting and prepares green compact, need to only suppress acquisition in a mold
Bone-shaped model charge, thus production procedure has been significantly simplified, smooth processing is carried out to mold, can be more precisely controlled
Shape of product and size, so that flash burning technology be made to have the basis of industrial applications, auxiliary heating of the invention provides more
Material, can be fast and accurately heated to the critical-temperature of flash burning by kind mode, and certain time is kept after reaching critical-temperature
Equilibrium temperature improves the stability of sintering process and the efficiency of flash burning.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (8)
1. a kind of flash burning molding method for preparing of ceramic crystal, which comprises the following steps:
S1, which pours raw material into, is pressed into bone-shaped material in bone-shaped mold, and carries out smooth processing to surface；
Mold is put into the sintering zone of flash burning equipment by S2, applies 40-50MPa pressure using upper and lower ends pressure head, and make bone-shaped
Material is in heating zone middle position, and mold is connected into the circuit of high voltage direct current flash burning power supply；
S3 open auxiliary heating power supply, with the speed of 160 DEG C/min-200 DEG C/min be heated to 1000 DEG C ~ 1200 DEG C or until
Phosphere occurs；
S4 opens high voltage direct current flash burning power supply, in mold two sides and passes to direct current, linearly increasing voltage 200V/cm, until hair
Raw flash burning phenomenon；
S5 control electric current is down to 1000A-1200A, constant current；Continue 15~20s；
S6 is cooled to room temperature, obtains fine and close sintered body；
S7 is polished directly sintered body surface, obtains required product.
2. a kind of flash burning molding method for preparing of ceramic crystal according to claim 1, which is characterized in that the auxiliary adds
Thermoelectric generator is induction auxiliary heating.
3. a kind of flash burning molding method for preparing of ceramic crystal according to claim 1, which is characterized in that the auxiliary adds
Thermoelectric generator is Microwave-assisted firing.
4. a kind of flash burning molding method for preparing of ceramic crystal according to claim 1, which is characterized in that the auxiliary adds
Thermoelectric generator is the heating of infrared auxiliary.
5. a kind of flash burning molding method for preparing of ceramic crystal according to claim 1, which is characterized in that the raw material is
Compound zirconia pelletizing or mixed rare-earth oxide pelletizing.
6. a kind of flash burning molding method for preparing of ceramic crystal according to claim 1, which is characterized in that the high pressure in S4
Direct current flash burning power supply instantaneous output power is greater than 2000kW.
7. a kind of flash burning molding method for preparing of ceramic crystal according to claim 1, which is characterized in that the S6 cooling
Process duration is 45-60min.
8. a kind of flash burning molding method for preparing of ceramic crystal according to claim 1, which is characterized in that heated in S3
Cheng Zhong monitors heating zone internal temperature in real time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910323444.1A CN109942303A (en) | 2019-04-22 | 2019-04-22 | A kind of flash burning molding method for preparing of ceramic crystal |
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| CN201910323444.1A CN109942303A (en) | 2019-04-22 | 2019-04-22 | A kind of flash burning molding method for preparing of ceramic crystal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112374536A (en) * | 2020-10-19 | 2021-02-19 | 中国工程物理研究院材料研究所 | Rapid preparation of spinel type Li at low temperature4Ti5O12Method for preparing lithium titanate material |
| CN114222724A (en) * | 2019-07-29 | 2022-03-22 | 国立大学法人东海国立大学机构 | Method and apparatus for manufacturing sintered body |
-
2019
- 2019-04-22 CN CN201910323444.1A patent/CN109942303A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114222724A (en) * | 2019-07-29 | 2022-03-22 | 国立大学法人东海国立大学机构 | Method and apparatus for manufacturing sintered body |
| CN114222724B (en) * | 2019-07-29 | 2024-02-06 | 国立大学法人东海国立大学机构 | Method and apparatus for producing sintered body |
| 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 |
| CN112374536A (en) * | 2020-10-19 | 2021-02-19 | 中国工程物理研究院材料研究所 | Rapid preparation of spinel type Li at low temperature4Ti5O12Method for preparing lithium titanate material |
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Application publication date: 20190628 |