CN109945642B - Rapid sintering furnace and sintering process for metal oxide ceramic material - Google Patents
Rapid sintering furnace and sintering process for metal oxide ceramic material Download PDFInfo
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Abstract
The invention relates to a rapid sintering furnace for metal oxide ceramic materials and a sintering process thereof, which solve the problems of short service life, low energy production and unstable process of rapid sintering equipment in the current industrial production. The device comprises a frame, wherein a hearth with a downward opening is arranged on the frame, and the device is characterized in that: the furnace from the top down has set gradually the high temperature cavity, well temperature cavity, the low temperature cavity of intercommunication each other, and low temperature cavity lower extreme opening still is equipped with the fire-resistant insulation pillar that can stretch into from low temperature cavity lower extreme in the frame, and the upper end of fire-resistant insulation pillar is for placing the carrier platform of waiting the sintering material. The invention realizes the use targets of quick organic matter loss, sintering temperature gradient control, crystallization rate gradient control and stable control on a sintering high-temperature region of the metal oxide ceramic material, and ensures the strength, the permeability, the crystallization rate and the crystallization uniformity of the metal oxide after sintering.
Description
Technical Field
The invention belongs to the field of medical materials, and relates to a sintering technology of a functional ceramic material, in particular to a rapid sintering furnace of a metal oxide ceramic material and a sintering process thereof.
Background
Metal oxide ceramic materials, such as alumina and zirconia, are widely used in various fields because of their excellent hardness, corrosion resistance, wear resistance and other physical properties. In recent years, with the development of medical apparatus and instruments in China, metal oxide ceramic materials such as alumina and zirconia are increasingly used as bionic materials in the aspect of replacing hard tissues of human bodies, such as artificial teeth and artificial bones. In view of the extremely high requirements of the hard tissue substitute of the human body on the physical and biological characteristics of the material such as hardness, toughness, wear resistance, biocompatibility and the like, even in the aesthetic fields of transparency, optical texture and the like of the material, the requirements are also put forward, which promotes the ceramic sintering equipment for manufacturing the material to be further improved so as to adapt to the corresponding manufacturing process requirements; meanwhile, as the market demand increases, the production speed for manufacturing the material is also required to be faster; therefore, new sintering equipment for making metal oxide ceramic materials is required to have higher production speeds.
At present, a high-temperature sintering furnace for metal oxide ceramic materials such as alumina and zirconia is generally designed as an integrated hearth, and a single heating body is adopted for heating, namely, the heating body is one of a silicon molybdenum rod and a silicon carbon rod; during production, alumina and zirconia materials to be sintered are placed on an objective table from a normal temperature state, after the materials are pushed into a hearth, a furnace door is closed, a heating body works to heat the hearth to 1450-1550 ℃ for a period of time until the sintering process is completed, then a heating rod stops heating, the hearth is opened to withdraw a product from the hearth, and usually 6-8 hours are required for finishing one process period, and even the continuous operation is also required for about 4 hours.
This design has the following problems: on the one hand, in actual production, a product can bring larger impact to a temperature field in a hearth when entering and exiting the hearth, the stability of the temperature field cannot be effectively ensured by a single heating body and a heat preservation design thereof, and meanwhile, a furnace cavity heat preservation material and an inlet and outlet heat preservation material are extremely easy to crack, and the heat preservation material of each part of the furnace body needs to be replaced partially or completely every 1-2 years; the new round of sintering needs more heating time, and the output efficiency of the equipment per unit time is limited. On the other hand, because the silicon-molybdenum rod heating body is not suitable to operate in the region of 400-700 ℃, otherwise, the silicon-molybdenum rod heating body is easy to oxidize at low temperature, and when the product enters and exits the hearth at high frequency, the service life and the function performance of the silicon-molybdenum rod heating body are greatly reduced; the silicon carbide rod is easy to increase in internal resistance and age when running for a long time at high temperature, so that sintering temperature cannot meet the requirement, and a heating element needs to be replaced in 0.8-1 year. Therefore, the sintering furnace adopting the single heating body design is easy to have the problems of unstable process temperature, easy aging and high maintenance frequency, and has limited rapid sintering capability. And thirdly, the design of a single heating body is difficult to finely control the temperature rising speed and the temperature stability in a high temperature area is poor, so that the sintered finished product is easy to crack, hide crack, insufficient crystallization rate, uneven crystallization and the like.
The high-temperature sintering furnaces used in the industry or industry all have the defects of overlong sintering time, poor sintering quality, high energy consumption, high manufacturing and maintenance cost and the like. Resulting in short life, low energy production and unstable process of the rapid sintering equipment.
Disclosure of Invention
The invention aims to solve the problems of short service life, low energy production and unstable process of rapid sintering equipment in the current industrial production, and provides a rapid sintering furnace for metal oxide ceramic materials and a sintering process thereof.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a metal oxide ceramic material rapid sintering stove, includes the frame, is equipped with downwardly opening's furnace in the frame, its characterized in that: the furnace from the top down has set gradually the high temperature cavity, well temperature cavity, the low temperature cavity of intercommunication each other, and low temperature cavity lower extreme opening still is equipped with the fire-resistant insulation pillar that can stretch into from low temperature cavity lower extreme in the frame, and the upper end of fire-resistant insulation pillar is for placing the carrier platform of waiting the sintering material. The device designs the hearth from top to bottom into a high-temperature chamber, a medium-temperature chamber and a low-temperature chamber with gradually reduced temperature, adopts a three-stage heating structure to carry out duplex heating, forms a sintering chamber with gradient rising sintering temperature from bottom to top in the hearth, and can meet the different temperature requirements of metal oxide ceramic materials in different stages of sintering. And the furnace mouth is downwards arranged, so that the temperature of the whole furnace is the lowest, and heat in the furnace flows upwards, so that the heat loss is reduced. In the sintering process, the fireproof heat-preserving table column stretches into the hearth upwards to plug the hearth opening, and when the fireproof heat-preserving table column stretches out downwards, the hearth opening can be plugged by adopting a baffle plate, so that heat loss is further reduced, energy consumption is reduced, the temperature stability in the hearth is kept, and the sintering process stability of the metal oxide ceramic material is ensured.
Preferably, the furnace wall of the high-temperature chamber is provided with a silicon-molybdenum heating body for three-stage heating; the furnace wall of the medium-temperature chamber is provided with a silicon-carbon heating body for secondary heating; the furnace wall of the low-temperature chamber is provided with an alloy resistance wire for primary heating; thermocouples are respectively arranged on the furnace walls of the high temperature chamber, the medium temperature chamber and the low temperature chamber. The silicon-molybdenum heating body operates at high temperature, the silicon-carbon heating body operates at medium temperature, and the alloy resistance wire operates at low temperature, so that the service life of each heating body is prolonged.
Preferably, the heating temperature of the high-temperature chamber is 1200-1700 ℃; the heating temperature of the medium-temperature chamber is 900-1300 ℃; the heating temperature of the low-temperature chamber is room temperature to 1000 ℃.
Preferably, the top surface of the high-temperature chamber is a concave mirror structure with a high reflection surface. The top wall of the high-temperature chamber can also select a high-reflectivity mirror light refractory insulating brick, and the high-reflectivity mirror can improve the reflecting capability of heat radiation light in the chamber, so that the insulating effect is enhanced.
Preferably, an epitaxial heat preservation sleeve member is arranged below the low-temperature chamber, a vertical channel matched with the outer wall of the refractory heat preservation table column is arranged in the center of the epitaxial heat preservation sleeve member, the upper end of the vertical channel is connected with an opening of the low-temperature chamber, the lower end of the vertical channel is used as a hearth, and an openable heat preservation baffle is arranged at the lower end of the vertical channel. The furnace mouth is prolonged, the heat convection distance inside and outside the furnace is increased, and the heat loss is further reduced.
Preferably, the epitaxial heat preservation external member is heat preservation inner tube, heat preservation urceolus, fire-resistant heat preservation cotton and heat exchanger from inside to outside in proper order, and heat preservation inner tube adopts light refractory material, and heat preservation urceolus and heat exchanger adopt metal material, and fire-resistant heat preservation cotton is filled aluminium silicate refractory fiber.
Preferably, a thermocouple rod is embedded in the refractory heat-insulating column in a vertically penetrating mode, and the upper end of the thermocouple rod extends out of the upper end face of the refractory heat-insulating column to serve as a temperature acquisition end.
Preferably, the frame is provided with a driving motor for driving the fire-resistant heat-insulating column to lift, and at least three proximity switches for controlling the lifting position of the fire-resistant heat-insulating column are arranged on the side of the fire-resistant heat-insulating column.
Preferably, the cross sections of the upper and lower channels of the high temperature chamber, the medium temperature chamber and the low temperature chamber are gradually reduced. The channel sizes of the high-temperature chamber, the medium-temperature chamber and the low-temperature chamber can be changed stepwise and gradually reduced, so that the internal temperature of the hearth is stable.
Preferably, the side wall of the hearth is made of a fireproof insulating brick, and fireproof insulating cotton is filled between the outer side of the fireproof insulating brick and the frame.
A sintering process of a metal oxide ceramic material rapid sintering furnace is characterized in that: the method comprises the following steps:
step a: the heat engine stage by stage, the refractory heat-preserving column descends to the lowest position, first starts first heating until the temperature of the low-temperature chamber reaches the set temperature T1, then starts second heating until the temperature of the medium-temperature chamber reaches T2, finally starts third heating until the temperature in the high-temperature chamber reaches the set temperature T3, and forms a temperature gradient interval with gradually increased temperature from bottom to top in the hearth;
step b: the method comprises the steps of sintering materials, namely placing a first batch of materials to be sintered on a carrying platform of a refractory heat-preserving table column, lifting the refractory heat-preserving table column, and sequentially and respectively maintaining set sintering time in a plurality of different temperature gradient intervals from low to high;
step c: c, after the first batch of sintering materials are sintered, lowering the fireproof heat-preserving table column to the bottom end, replacing the next batch of materials to be sintered, and repeating the step b until all the materials to be sintered are sintered;
step d: the step-by-step cooler is firstly closed for three-stage heating until the temperature in the high-temperature chamber reaches the set temperature T4, then closed for two-stage heating until the temperature in the medium-temperature chamber reaches T5, and finally closed for one-stage heating.
Preferably, the step b adopts fixed point control, a low temperature region fixed point is selected in a low temperature chamber range, a medium temperature region fixed point is selected in a medium temperature chamber range, a high temperature region fixed point is selected in a high temperature chamber range, the refractory insulation columns are gradually lifted, the refractory insulation column carrying platform sequentially maintains a set time t1 in the low temperature region fixed point and a set time t2 in the medium temperature region fixed point, and sintering is completed after a set time t3 in the high temperature region fixed point.
As another preferable scheme, the step b adopts dynamic control, the sintering target temperature T6 and duration T4 of the low-temperature chamber are set, the sintering target temperature T7 and duration T5 of the medium-temperature chamber are set, the sintering target temperature T8 and duration T6 of the high-temperature chamber are set, and the sintering of the material to be sintered is completed after the material to be sintered sequentially passes through the low-temperature chamber, the medium-temperature chamber and the high-temperature chamber; in the sintering process of the low-temperature chamber, the medium-temperature chamber and the high-temperature chamber, the top end of the thermocouple rod collects the temperature of the carrying platform in real time, when the temperature of the carrying platform is higher than the target temperature, the refractory insulation platform is lowered, and when the temperature of the carrying platform is lower than the target temperature, the refractory insulation platform is raised.
The invention realizes the use targets of rapid organic matter loss burning of the metal oxide ceramic material, sintering temperature gradient control, crystallization rate gradient control and stable control of a sintering high-temperature region. Secondly, the strength, the permeability, the crystallization rate and the crystallization uniformity of the sintered metal oxide are ensured. Finally, the invention can also adapt to the rapid heating and cooling processes from normal temperature to 1700 ℃, and effectively protect the furnace body materials and functions thereof; the temperature fluctuation of continuous industrial production is small, and the rapid sintering process time is shortened to be within 2.5 hours under the state of heat engine; the equipment has stable performance in long-term operation, the large maintenance period can be prolonged to 3 years or more, and the service life of the furnace body and the productivity thereof are improved by 50% or more.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a half cross-sectional structure of a machine body of the present invention.
Fig. 2 is a schematic structural view of the epitaxial incubation kit of the present invention.
FIG. 3 is a sintering flow chart of step b of the present invention.
Fig. 4 is a step-by-step heat engine flow chart of step a of the present invention.
FIG. 5 is a step-by-step chiller flow chart of step d of the present invention.
In the figure: 1. the device comprises a machine body, 2, a driving motor, 3, a lifting slideway, 4, a proximity switch, 5, a fireproof heat preservation table post, 6, a thermocouple rod, 7, an epitaxial heat preservation sleeve, 71, a vertical channel, 72, a heat preservation inner cylinder, 73, a heat preservation outer cylinder, 74, fireproof heat preservation cotton, 75, a heat shield, 76, a heat preservation baffle, 8, a low-temperature chamber, 9, a medium-temperature chamber, 10, a high-temperature chamber, 11, a thermocouple, 12, an alloy resistance wire, 13, a silicon-carbon heating body, 14, a silicon-molybdenum heating body, 15, a fireproof heat preservation brick, 16, fireproof heat preservation cotton, 17, an audible-visual alarm, 18, a heating body temperature controller, 19, a voltage/current feed-in module, 20, a control switch, 21, a PLC control module and a human-computer interaction interface, 22 and a main temperature controller.
Detailed Description
The invention will be further illustrated by the following examples in conjunction with the accompanying drawings.
Examples: a rapid sintering furnace for metal oxide ceramic materials, as shown in figure 1, comprises a frame 1, wherein a hearth with a downward opening is arranged on the frame. The hearth is provided with a high-temperature chamber 10, a medium-temperature chamber 9 and a low-temperature chamber 8 which are communicated with each other from top to bottom in sequence. The furnace wall of the high-temperature chamber 10 is provided with a silicon-molybdenum heating body 14 for three-stage heating; the furnace wall of the medium-temperature chamber is provided with a silicon-carbon heating body 13 for secondary heating; the furnace wall of the low-temperature chamber is provided with an alloy resistance wire 12 for primary heating; thermocouples 11 are respectively arranged on the furnace walls of the high temperature chamber, the medium temperature chamber and the low temperature chamber. The heating temperature of the high-temperature chamber is 1200-1700 ℃; the heating temperature of the medium-temperature chamber is 900-1300 ℃; the heating temperature of the low-temperature chamber is room temperature to 1000 ℃. The top surface of the high-temperature chamber is a concave mirror structure with a high reflection surface. The sections of the upper and lower channels of the high-temperature chamber, the medium-temperature chamber and the low-temperature chamber are gradually reduced. The side wall of the hearth is made of a fireproof insulating brick 15, and fireproof insulating cotton 16 is filled between the outer side of the fireproof insulating brick and the frame protection cover.
The lower end of the low-temperature chamber 8 is opened, a lifting fireproof heat-insulating column 5 which can extend in from the lower end of the low-temperature chamber is further arranged on the frame, the upper end of the fireproof heat-insulating column is a carrying platform for placing materials to be sintered, a thermocouple 6 is arranged in the fireproof heat-insulating column in a penetrating manner from top to bottom, and the upper end of the thermocouple rod extends out of the upper end face of the fireproof heat-insulating column to serve as a temperature acquisition end. The outer wall of the fireproof heat-preserving table column 5 is of a cylinder or polyhedral cylinder structure, the diameter of the cylinder or the diameter of the polyhedral circumcircle of the fireproof heat-preserving table column 5 can be 8-38cm, and the height of the fireproof heat-preserving table column is not more than 1500cm.
An epitaxial heat preservation sleeve 7 is arranged below the low-temperature chamber. The epitaxial heat preservation external member is as shown in fig. 2, and the epitaxial heat preservation external member center is equipped with the vertical passageway 71 with fire-resistant heat preservation pillar outer wall adaptation, and vertical passageway upper end links to each other with the opening of low temperature cavity, and vertical passageway lower extreme is as furnace mouth, and vertical passageway lower extreme is equipped with the heat preservation baffle 76 that can open and shut. The epitaxial heat preservation external member is heat preservation inner tube 72, heat preservation urceolus 73, fire-resistant heat preservation cotton 74 and heat exchanger 75 from inside to outside in proper order, and the heat preservation inner tube adopts light refractory material, and heat preservation urceolus and heat exchanger adopt metal material, and fire-resistant heat preservation cotton is filled aluminium silicate refractory fiber. The vertical channel 71 of the epitaxial heat preservation sleeve is of a cylinder or polyhedral cylinder structure, the diameter of the vertical channel or the diameter of a polyhedron circumcircle can be 10-40cm, and the height of the vertical channel is 5-30cm.
The frame 1 is provided with a driving motor 2 for driving the fire-resistant heat-insulating table column to lift, the frame is also provided with a lifting slideway 3 for the fire-resistant heat-insulating table column to lift up and down, and the lifting slideway 3 is provided with at least three proximity switches 4 for controlling the lifting position of the fire-resistant heat-insulating table column.
The frame 1 is also provided with a heating element temperature controller 18, a voltage/current feed-in module 19, a control switch 20, a PLC control module and a man-machine interaction interface 21, and a main temperature controller 22 at the outer side of the hearth. An audible and visual alarm 17 is also arranged at the top of the frame.
A sintering process of a metal oxide ceramic material rapid sintering furnace comprises the following steps:
step a: the step-by-step heat engine is shown in fig. 4, the refractory heat-preserving column is lowered to the lowest position, first-stage heating is started until the temperature of the low-temperature chamber reaches the set temperature T1, the temperature of the low-temperature chamber is 200 ℃ or less than or equal to T1 and is less than or equal to 900 ℃, then second-stage heating is started until the temperature of the medium-temperature chamber reaches T2, the temperature of the medium-temperature chamber is 700 ℃ or less than or equal to T2 and is less than or equal to 1200 ℃, finally third-stage heating is started until the temperature in the high-temperature chamber reaches the set temperature T3, the temperature of the high-temperature chamber is 1000 ℃ or less than or equal to T3 and is less than or equal to 1750 ℃, and a temperature gradient interval with gradually increased temperature from bottom to top is formed in a hearth;
step b: the method comprises the steps of sintering materials, namely placing a first batch of materials to be sintered on a carrying platform of a refractory heat-preserving table column, lifting the refractory heat-preserving table column, and sequentially and respectively maintaining set sintering time in a plurality of different temperature gradient intervals from low to high;
step c: c, after the first batch of sintering materials are sintered, lowering the fireproof heat-preserving table column to the bottom end, replacing the next batch of materials to be sintered, and repeating the step b until all the materials to be sintered are sintered;
step d: the step-by-step cooling machine is shown in fig. 5, wherein the three-stage heating is firstly turned off until the temperature in the high-temperature chamber reaches the set temperature T4, the temperature T4 is more than or equal to 700 ℃ and less than or equal to 1200 ℃, then the two-stage heating is turned off until the temperature in the medium-temperature chamber reaches T5, the temperature T5 is more than or equal to 900 ℃ and less than or equal to 200 ℃, and finally the first-stage heating is turned off.
In the step b, fixed-point control can be adopted, that is, as shown in the right side of fig. 3, a low-temperature area fixed point is selected in the range of the low-temperature chamber, a medium-temperature area fixed point is selected in the range of the medium-temperature chamber, a high-temperature area fixed point is selected in the range of the high-temperature chamber, the refractory insulation columns are gradually lifted, the refractory insulation column carrying platform sequentially maintains a set time t1 at the low-temperature area fixed point and a set time t2 at the medium-temperature area fixed point, and sintering is completed after the set time t3 at the high-temperature area fixed point.
Step b may also adopt dynamic control, that is, as shown in the left side of fig. 3, a low-temperature chamber sintering target temperature T6 and a duration T4 are set, a medium-temperature chamber sintering target temperature T7 and a duration T5, a high-temperature chamber sintering target temperature T8 and a duration T6, and sintering is completed after the material to be sintered passes through the low-temperature chamber, the medium-temperature chamber and the high-temperature chamber in sequence; in the sintering process of the low-temperature chamber, the medium-temperature chamber and the high-temperature chamber, the top end of the thermocouple rod collects the temperature of the carrying platform in real time, when the temperature of the carrying platform is higher than the target temperature, the refractory insulation platform is lowered, and when the temperature of the carrying platform is lower than the target temperature, the refractory insulation platform is raised.
Claims (8)
1. The utility model provides a metal oxide ceramic material rapid sintering stove, includes the frame, is equipped with downwardly opening's furnace in the frame, its characterized in that: the furnace chamber is sequentially provided with a high-temperature chamber, a medium-temperature chamber and a low-temperature chamber which are mutually communicated from top to bottom, the lower end of the low-temperature chamber is provided with an opening, a lifting refractory heat-preserving table column which can extend in from the lower end of the low-temperature chamber is also arranged on the frame, and the upper end of the refractory heat-preserving table column is a carrying platform for placing materials to be sintered; the top surface of the high-temperature chamber is a concave mirror structure with a high reflection surface; the fire-resistant heat-insulating table column extends upwards into the hearth to seal the hearth opening, and when the fire-resistant heat-insulating table column is pulled downwards, a baffle plate is used for sealing the hearth opening; the sections of the upper and lower channels of the high-temperature chamber, the medium-temperature chamber and the low-temperature chamber are gradually reduced.
2. A rapid sintering furnace for metal oxide ceramic materials according to claim 1, wherein: the furnace wall of the high-temperature chamber is provided with a silicon-molybdenum heating body for three-stage heating; the furnace wall of the medium-temperature chamber is provided with a silicon-carbon heating body for secondary heating; the furnace wall of the low-temperature chamber is provided with an alloy resistance wire for primary heating; thermocouples are respectively arranged on the furnace walls of the high-temperature chamber, the medium-temperature chamber and the low-temperature chamber, thermocouple rods are embedded in the refractory heat-preservation table columns in a vertically penetrating mode, and the upper ends of the thermocouple rods extend out of the upper end faces of the refractory heat-preservation table columns to serve as temperature collecting ends.
3. A rapid sintering furnace for metal oxide ceramic materials according to claim 1 or 2, characterized in that: the heating temperature of the high-temperature chamber is 1200-1700 ℃; the heating temperature of the medium-temperature chamber is 900-1300 ℃; the heating temperature of the low-temperature chamber is room temperature to 1000 ℃.
4. A rapid sintering furnace for metal oxide ceramic materials according to claim 1 or 2, characterized in that: the low temperature chamber below is provided with epitaxial heat preservation external member, the center of epitaxial heat preservation external member is equipped with the vertical passageway with fire-resistant heat preservation pillar outer wall adaptation, and vertical passageway upper end links to each other with the opening of low temperature chamber, and vertical passageway lower extreme is as the furnace mouth, and vertical passageway lower extreme is equipped with the heat preservation baffle that can open and shut, epitaxial heat preservation external member is heat preservation inner tube, heat preservation urceolus, fire-resistant heat preservation cotton and heat exchanger from inside to outside in proper order, and the heat preservation inner tube adopts light refractory material, and heat preservation urceolus and heat exchanger adopt metal material, and fire-resistant heat preservation cotton is filled aluminium silicate refractory fiber.
5. A rapid sintering furnace for metal oxide ceramic materials according to claim 1 or 2, characterized in that: the fire-resistant heat-preserving table column is characterized in that a driving motor for driving the fire-resistant heat-preserving table column to lift is arranged on the frame, and at least three proximity switches for controlling the lifting position of the fire-resistant heat-preserving table column are arranged on the side of the fire-resistant heat-preserving table column on the frame.
6. A sintering process of a rapid sintering furnace for metal oxide ceramic materials, which uses the rapid sintering furnace for metal oxide ceramic materials according to claim 1, characterized in that: the method comprises the following steps:
step a: the heat engine stage by stage, the refractory heat-preserving column descends to the lowest position, first starts first heating until the temperature of the low-temperature chamber reaches the set temperature T1, then starts second heating until the temperature of the medium-temperature chamber reaches T2, finally starts third heating until the temperature in the high-temperature chamber reaches the set temperature T3, and forms a temperature gradient interval with gradually increased temperature from bottom to top in the hearth;
step b: the method comprises the steps of sintering materials, namely placing a first batch of materials to be sintered on a carrying platform of a refractory heat-preserving table column, lifting the refractory heat-preserving table column, and sequentially and respectively maintaining set sintering time in a plurality of different temperature gradient intervals from low to high;
step c: c, after the first batch of sintering materials are sintered, lowering the fireproof heat-preserving table column to the bottom end, replacing the next batch of materials to be sintered, and repeating the step b until all the materials to be sintered are sintered;
step d: the step-by-step cooler is firstly closed for three-stage heating until the temperature in the high-temperature chamber reaches the set temperature T4, then closed for two-stage heating until the temperature in the medium-temperature chamber reaches T5, and finally closed for one-stage heating.
7. The sintering process of the rapid sintering furnace for metal oxide ceramic materials according to claim 6, wherein: and b, adopting fixed point control, selecting a low-temperature region fixed point in a low-temperature chamber range, selecting a medium-temperature region fixed point in a medium-temperature chamber range, selecting a high-temperature region fixed point in a high-temperature chamber range, gradually lifting a refractory heat preservation table column, sequentially maintaining a refractory heat preservation table column carrying platform for a set time t1 at the low-temperature region fixed point and a set time t2 at the medium-temperature region fixed point, and completing sintering after maintaining a set time t3 at the high-temperature region fixed point.
8. The sintering process of the rapid sintering furnace for metal oxide ceramic materials according to claim 6, wherein: step b adopts dynamic control, and sets a low-temperature chamber sintering target temperature T6 and a duration time T4, a medium-temperature chamber sintering target temperature T7 and a duration time T5, and a high-temperature chamber sintering target temperature T8 and a duration time T6, wherein the material to be sintered is sintered after passing through the low-temperature chamber, the medium-temperature chamber and the high-temperature chamber in sequence; in the sintering process of the low-temperature chamber, the medium-temperature chamber and the high-temperature chamber, the top end of the thermocouple rod collects the temperature of the carrying platform in real time, when the temperature of the carrying platform is higher than the target temperature, the refractory insulation platform is lowered, and when the temperature of the carrying platform is lower than the target temperature, the refractory insulation platform is raised.
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