CN109387077A - A kind of vacuum hotpressing stove temperature control system - Google Patents
A kind of vacuum hotpressing stove temperature control system Download PDFInfo
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- CN109387077A CN109387077A CN201710693474.2A CN201710693474A CN109387077A CN 109387077 A CN109387077 A CN 109387077A CN 201710693474 A CN201710693474 A CN 201710693474A CN 109387077 A CN109387077 A CN 109387077A
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- temperature
- mold
- electromagnetic heater
- supply unit
- power supply
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Classifications
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- 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere
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- 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
-
- 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/14—Arrangements of heating devices
-
- 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/18—Arrangement of controlling, monitoring, alarm or like devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention provides a kind of vacuum hotpressing stove temperature control system, the system comprises: power supply unit, control device, electromagnetic heater, mold, temperature-detecting device, muff；The control device is arranged between the power supply unit and electromagnetic heater, control device is used to control the size of the power supply unit and electromagnetic heater energization and power-off or control power supply unit to electromagnetic heater output electric current, and then control electromagnetic heater is to the heating temperature of mold.Vacuum hotpressing stove temperature control system of the invention has preferable temperature incubation function, so that magnetic powder is hot pressed into green compact at a relative constant temperature always, magnet obtained will have preferable magnetic property.
Description
Technical field
The present invention relates to magnet manufacturing field, in particular to a kind of vacuum hotpressing stove temperature control system.
Background technique
Vacuum hotpressing stove is usually used in preparing anisotropic neodymium iron boron magnetic body.The preparation process of anisotropic neodymium iron boron magnetic body
Are as follows: magnetic powder is first packed into mold, is hot pressed into green compact under a certain temperature and pressure, green compact be it is cylindric, then green compact is put into
Deformation is depressed in the bigger mold of diameter under a certain temperature and pressure, deformed magnet is disc-shaped, after deformation in magnet
Portion's structure changes, and improves magnetic property.During hot pressing and thermal deformation two, temperature is all mostly important factor.
The heating method of vacuum hotpressing stove uses induction heating, and temperature rises fast when the characteristics of induction heating is to heat,
Stop temperature after heating declining rapidly, be not easy that temperature is made to maintain preset value in this way, can not also keep the temperature, influence magnet performance and
The consistency of product.
Summary of the invention
In order to solve vacuum hotpressing stove can not heated at constant temperature the technical issues of, the present invention is implemented as follows:
A kind of vacuum hotpressing stove temperature control system, the system comprises: power supply unit, control device, electromagnetic heater, mould
Tool, temperature-detecting device, muff；
The control device is arranged between the power supply unit and electromagnetic heater, and control device is for controlling the confession
Electric installation and electromagnetic heater are powered and power off, and then control electromagnetic heater to the heating of mold or do not heat；
The temperature-detecting device is electrically connected with control device, for detecting the temperature of mould inside；When temperature detection fills
It sets when detecting that temperature reaches default maximum temperature threshold value in mold, power supply unit and electromagnetic heater power off, electromagnetic heater
Mold is not heated；When temperature-detecting device detects that temperature reaches default minimum temperature threshold in mold, power supply unit with
Electromagnetic heater is powered, and electromagnetic heater heats mold；
The muff package is partly wrapped on the outside of mold, for keeping the temperature to mold.
Preferably, the muff is made of mullite fiber；Its chemical constituent is the AL of 72%-75%2O3, 17%-
20% SiO2, remaining group is divided into ZrO2And Fe2O3。
A kind of vacuum hotpressing stove temperature control system, the system comprises: power supply unit, control device, electromagnetic heater, mould
Tool, temperature-detecting device；
The control device is arranged between the power supply unit and electromagnetic heater, and control device is for controlling the confession
Electric installation exports the size of electric current to electromagnetic heater, and then controls electromagnetic heater to the heating power of mold；
The temperature-detecting device is electrically connected with control device, for detecting the temperature of mould inside；When temperature detection fills
It sets when detecting that temperature reaches default maximum temperature threshold value in mold, power supply unit becomes smaller to the electric current that electromagnetic heater exports,
Electromagnetic heater is reduced to the heating power of mold；When temperature-detecting device detects that temperature reaches default minimum temperature in mold
When threshold value, power supply unit becomes larger to the electric current that electromagnetic heater exports, and increases electromagnetic heater to the heating power of mold.
Preferably, the difference of the maximum temperature threshold value and minimum temperature threshold is not more than 20 DEG C.
Further, the difference of the maximum temperature threshold value and minimum temperature threshold is 5 DEG C.
The beneficial effects of the present invention are:
The present invention maintains the relative constant of temperature in mold using two kinds of mentalities of designing: thinking is first is that in mold outer sheath
With the preferable muff of thermal insulation property, cooperation control power supply unit and electromagnetic heater are powered and power off to maintain temperature in mold
It is relative constant；Thinking is second is that by changing size of the power supply unit to electromagnetic heater output electric current, so that mold receives
Thermal energy and the thermal energy of mold and air exchange reach balance in certain temperature range, for maintaining the opposite of temperature in mold
It is constant.
Detailed description of the invention
Fig. 1 is a kind of vacuum hotpressing stove temperature control system structural schematic diagram provided in an embodiment of the present invention.
Specific embodiment
In order to describe the technical content, the structural feature, the achieved object and the effect of this invention in detail, below in conjunction with embodiment
And attached drawing is cooperated to be explained in detail.
Embodiment 1
A kind of vacuum hotpressing stove temperature control system (as shown in Figure 1), the system comprises: power supply unit, control device, electromagnetism
Heater, mold 1, temperature-detecting device, muff 2；
The control device is arranged between the power supply unit and electromagnetic heater, and control device is for controlling the confession
Electric installation and electromagnetic heater are powered and power off, and then control electromagnetic heater to the heating of mold 1 or do not heat；
The temperature-detecting device is electrically connected with control device, for detecting the temperature inside mold 1；When temperature detection fills
It sets when detecting that temperature reaches default maximum temperature threshold value in mold 1, power supply unit and electromagnetic heater power off, electromagnetic heater
Mold 1 is not heated；When temperature-detecting device detects that temperature reaches default minimum temperature threshold in mold 1, power supply unit
It is powered with electromagnetic heater, electromagnetic heater heats mold 1；The difference of the maximum temperature threshold value and minimum temperature threshold
No more than 20 DEG C；
The muff 2 package is partly wrapped in 1 outside of mold, for being kept the temperature to mold 1, the muff 2 by
Mullite fiber is made；Its chemical constituent is the AL of 72% (being weight percentage below)2O3, 20% SiO2, 4%
ZrO2With 4% Fe2O3.Mullite fiber maximum operation (service) temperature has significant thermal insulation property up to 1600 degree.
After magnetic powder is packed into mold 1, different magnetic powders has different hot pressing temperatures, according to the difference of processing magnetic powder, setting
Different temperature thresholds.When beginning to warm up, 1 temperature of mold is gradually increasing by room temperature, when reaching default maximum temperature threshold value, is supplied
Electric installation and electromagnetic heater power off, and electromagnetic heater does not heat mold 1, kept the temperature by muff 2 to mold 1, because protecting
The material of temperature set 2 is special, has preferable heat insulation effect, after a period of time, the temperature of mold 1 can just drop to preset minimum
Temperature threshold, power supply unit and electromagnetic heater are powered at this time, and electromagnetic heater heats mold 1, until 1 temperature of mold reaches
When default maximum temperature threshold value, power supply unit and electromagnetic heater are powered off, and electromagnetic heater does not heat mold 1.And so on
Circulation realizes the opposite heated at constant temperature to magnetic powder.The size of constant temperature depends on the difference of maximum temperature threshold value and minimum temperature threshold
Value, generally, the difference is smaller, and the effect of heated at constant temperature is more obvious.
Embodiment 2
A kind of vacuum hotpressing stove temperature control system (as shown in Figure 1), the system comprises: power supply unit, control device, electromagnetism
Heater, mold 1, temperature-detecting device, muff 2；
The control device is arranged between the power supply unit and electromagnetic heater, and control device is for controlling the confession
Electric installation and electromagnetic heater are powered and power off, and then control electromagnetic heater to the heating of mold 1 or do not heat；
The temperature-detecting device is electrically connected with control device, for detecting the temperature inside mold 1；When temperature detection fills
It sets when detecting that temperature reaches default maximum temperature threshold value in mold 1, power supply unit and electromagnetic heater power off, electromagnetic heater
Mold 1 is not heated；When temperature-detecting device detects that temperature reaches default minimum temperature threshold in mold 1, power supply unit
It is powered with electromagnetic heater, electromagnetic heater heats mold 1；The difference of the maximum temperature threshold value and minimum temperature threshold
No more than 10 DEG C；
The muff 2 package is partly wrapped in 1 outside of mold, for being kept the temperature to mold 1, the muff 2 by
Mullite fiber is made；The AL that its chemical constituent is 75%2O3, 17% SiO2, 3% ZrO2With 5% Fe2O3.Mullite
Fiber maximum operation (service) temperature has significant thermal insulation property up to 1600 degree.
After magnetic powder is packed into mold 1, different magnetic powders has different hot pressing temperatures, according to the difference of processing magnetic powder, setting
Different temperature thresholds.When beginning to warm up, 1 temperature of mold is gradually increasing by room temperature, when reaching default maximum temperature threshold value, is supplied
Electric installation and electromagnetic heater power off, and electromagnetic heater does not heat mold 1, kept the temperature by muff 2 to mold 1, because protecting
The material of temperature set 2 is special, has preferable heat insulation effect, after a period of time, the temperature of mold 1 can just drop to preset minimum
Temperature threshold, power supply unit and electromagnetic heater are powered at this time, and electromagnetic heater heats mold 1, until 1 temperature of mold reaches
When default maximum temperature threshold value, power supply unit and electromagnetic heater are powered off, and electromagnetic heater does not heat mold 1.And so on
Circulation realizes the opposite heated at constant temperature to magnetic powder.The size of constant temperature depends on the difference of maximum temperature threshold value and minimum temperature threshold
Value, generally, the difference is smaller, and the effect of heated at constant temperature is more obvious.
Embodiment 3
A kind of vacuum hotpressing stove temperature control system (as shown in Figure 1), the system comprises: power supply unit, control device, electromagnetism
Heater, mold 1, temperature-detecting device, muff 2；
The control device is arranged between the power supply unit and electromagnetic heater, and control device is for controlling the confession
Electric installation and electromagnetic heater are powered and power off, and then control electromagnetic heater to the heating of mold 1 or do not heat；
The temperature-detecting device is electrically connected with control device, for detecting the temperature inside mold 1；When temperature detection fills
It sets when detecting that temperature reaches default maximum temperature threshold value in mold 1, power supply unit and electromagnetic heater power off, electromagnetic heater
Mold 1 is not heated；When temperature-detecting device detects that temperature reaches default minimum temperature threshold in mold 1, power supply unit
It is powered with electromagnetic heater, electromagnetic heater heats mold 1；The difference of the maximum temperature threshold value and minimum temperature threshold
No more than 5 DEG C；
The muff 2 package is partly wrapped in 1 outside of mold, for being kept the temperature to mold 1, the muff 2 by
Mullite fiber is made；The AL that its chemical constituent is 74%2O3, 18% SiO2, 6% ZrO2With 2% Fe2O3.Mullite
Fiber maximum operation (service) temperature has significant thermal insulation property up to 1600 degree.
After magnetic powder is packed into mold 1, different magnetic powders has different hot pressing temperatures, according to the difference of processing magnetic powder, setting
Different temperature thresholds.When beginning to warm up, 1 temperature of mold is gradually increasing by room temperature, when reaching default maximum temperature threshold value, is supplied
Electric installation and electromagnetic heater power off, and electromagnetic heater does not heat mold 1, kept the temperature by muff 2 to mold 1, because protecting
The material of temperature set 2 is special, has preferable heat insulation effect, after a period of time, the temperature of mold 1 can just drop to preset minimum
Temperature threshold, power supply unit and electromagnetic heater are powered at this time, and electromagnetic heater heats mold 1, until 1 temperature of mold reaches
When default maximum temperature threshold value, power supply unit and electromagnetic heater are powered off, and electromagnetic heater does not heat mold 1.And so on
Circulation realizes the opposite heated at constant temperature to magnetic powder.The size of constant temperature depends on the difference of maximum temperature threshold value and minimum temperature threshold
Value, generally, the difference is smaller, and the effect of heated at constant temperature is more obvious.
Embodiment 4
A kind of vacuum hotpressing stove temperature control system (as shown in Figure 1), the system comprises: power supply unit, control device, electromagnetism
Heater, mold 1, temperature-detecting device；
The control device is arranged between the power supply unit and electromagnetic heater, and control device is for controlling the confession
Electric installation exports the size of electric current to electromagnetic heater, and then controls electromagnetic heater to the heating power of mold 1；
The temperature-detecting device is electrically connected with control device, for detecting the temperature inside mold 1；When temperature detection fills
It sets when detecting that temperature reaches default maximum temperature threshold value in mold 1, power supply unit becomes smaller to the electric current that electromagnetic heater exports,
Electromagnetic heater is reduced to the heating power of mold 1；When temperature-detecting device detects that temperature reaches default lowest temperature in mold 1
When spending threshold value, power supply unit becomes larger to the electric current that electromagnetic heater exports, and increases electromagnetic heater to the heating power of mold 1；
The difference of the maximum temperature threshold value and minimum temperature threshold is not more than 20 DEG C.
After magnetic powder is packed into mold 1, different magnetic powders has different hot pressing temperatures, according to the difference of processing magnetic powder, setting
Different temperature thresholds.When beginning to warm up, 1 temperature of mold is gradually increasing by room temperature, when reaching default maximum temperature threshold value, is supplied
Electric installation becomes smaller to electromagnetic heater output electric current, reduces electromagnetic heater to the heating power of mold 1；Mold 1 and sky at this time
Heat exchange occurs for gas, and (1) when the heat that mold 1 obtains is equal with the heat that air exchanges therewith, the temperature of mold 1 will
Maintain maximum temperature threshold value；(2) when the heat that mold 1 obtains is less than the heat that air exchanges therewith, the temperature of mold 1
Degree, which will be gradually decrease until, reaches minimum temperature threshold, and power supply unit becomes larger to the electric current that electromagnetic heater exports, and increases electromagnetism
Heater is to the heating power of mold 1, and the temperature of mold 1 slowly increases, until temperature reaches default maximum temperature threshold in mold 1
When value, power supply unit becomes smaller to the electric current that electromagnetic heater exports, so on circulate；(3) when the heat that mold 1 obtains is greater than
When the heat that air exchanges therewith, temperature will be more than maximum temperature threshold value, and power supply unit exports electricity to electromagnetic heater
Stream will continue to become smaller until temperature drops to maximum temperature threshold value or less.Control device controls the power supply unit to electromagnetic heater
The size for exporting electric current depends on the heat exchange amount of mold 1 and air, increases or reduce the size of electric current, its purpose is to
So that thermal energy and mold 1 that mold 1 receives and the thermal energy of air exchange reach balance in certain temperature range, for maintaining
Temperature is relative constant in mold 1.
Embodiment 5
A kind of vacuum hotpressing stove temperature control system (as shown in Figure 1), the system comprises: power supply unit, control device, electromagnetism
Heater, mold 1, temperature-detecting device；
The control device is arranged between the power supply unit and electromagnetic heater, and control device is for controlling the confession
Electric installation exports the size of electric current to electromagnetic heater, and then controls electromagnetic heater to the heating power of mold 1；
The temperature-detecting device is electrically connected with control device, for detecting the temperature inside mold 1；When temperature detection fills
It sets when detecting that temperature reaches default maximum temperature threshold value in mold 1, power supply unit becomes smaller to the electric current that electromagnetic heater exports,
Electromagnetic heater is reduced to the heating power of mold 1；When temperature-detecting device detects that temperature reaches default lowest temperature in mold 1
When spending threshold value, power supply unit becomes larger to the electric current that electromagnetic heater exports, and increases electromagnetic heater to the heating power of mold 1；
The difference of the maximum temperature threshold value and minimum temperature threshold is not more than 5 DEG C.
After magnetic powder is packed into mold 1, different magnetic powders has different hot pressing temperatures, according to the difference of processing magnetic powder, setting
Different temperature thresholds.When beginning to warm up, 1 temperature of mold is gradually increasing by room temperature, when reaching default maximum temperature threshold value, is supplied
Electric installation becomes smaller to electromagnetic heater output electric current, reduces electromagnetic heater to the heating power of mold 1；Mold 1 and sky at this time
Heat exchange occurs for gas, and (1) when the heat that mold 1 obtains is equal with the heat that air exchanges therewith, the temperature of mold 1 will
Maintain maximum temperature threshold value；(2) when the heat that mold 1 obtains is less than the heat that air exchanges therewith, the temperature of mold 1
Degree, which will be gradually decrease until, reaches minimum temperature threshold, and power supply unit becomes larger to the electric current that electromagnetic heater exports, and increases electromagnetism
Heater is to the heating power of mold 1, and the temperature of mold 1 slowly increases, until temperature reaches default maximum temperature threshold in mold 1
When value, power supply unit becomes smaller to the electric current that electromagnetic heater exports, so on circulate；(3) when the heat that mold 1 obtains is greater than
When the heat that air exchanges therewith, temperature will be more than maximum temperature threshold value, and power supply unit exports electricity to electromagnetic heater
Stream will continue to become smaller until temperature drops to maximum temperature threshold value or less.Control device controls the power supply unit to electromagnetic heater
The size for exporting electric current depends on the heat exchange amount of mold 1 and air, increases or reduce the size of electric current, its purpose is to
So that thermal energy and mold 1 that mold 1 receives and the thermal energy of air exchange reach balance in certain temperature range, for maintaining
Temperature is relative constant in mold 1.
The above description is only an embodiment of the present invention, is not intended to limit scope of patent protection of the invention, all utilizations
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (5)
1. a kind of vacuum hotpressing stove temperature control system, which is characterized in that the system comprises: power supply unit, control device, electromagnetism add
Hot device, mold, temperature-detecting device, muff；
The control device is arranged between the power supply unit and electromagnetic heater, and control device is described for Denso for controlling
It sets and is powered and powers off with electromagnetic heater, and then control electromagnetic heater to the heating of mold or do not heat；
The temperature-detecting device is electrically connected with control device, for detecting the temperature of mould inside；When temperature-detecting device is examined
When measuring temperature in mold and reaching default maximum temperature threshold value, power supply unit and electromagnetic heater are powered off, and electromagnetic heater is to mould
Tool does not heat；When temperature-detecting device detects that temperature reaches default minimum temperature threshold in mold, power supply unit and electromagnetism
Heater is powered, and electromagnetic heater heats mold；
The muff package is partly wrapped on the outside of mold, for keeping the temperature to mold.
2. vacuum hotpressing stove temperature control system as described in claim 1, which is characterized in that the muff is by mullite fiber
It is made；Its chemical constituent is the AL of 72%-75%2O3, 17%-20% SiO2, remaining group is divided into ZrO2And Fe2O3。
3. a kind of vacuum hotpressing stove temperature control system, which is characterized in that the system comprises: power supply unit, control device, electromagnetism add
Hot device, mold, temperature-detecting device；
The control device is arranged between the power supply unit and electromagnetic heater, and control device is described for Denso for controlling
The size to electromagnetic heater output electric current is set, and then controls electromagnetic heater to the heating power of mold；
The temperature-detecting device is electrically connected with control device, for detecting the temperature of mould inside；When temperature-detecting device is examined
When measuring temperature in mold and reaching default maximum temperature threshold value, power supply unit becomes smaller to the electric current that electromagnetic heater exports, and reduces
Heating power of the electromagnetic heater to mold；When temperature-detecting device detects that temperature reaches default minimum temperature threshold in mold
When, power supply unit becomes larger to the electric current that electromagnetic heater exports, and increases electromagnetic heater to the heating power of mold.
4. the vacuum hotpressing stove temperature control system as described in claims 1 to 3 is any, which is characterized in that the maximum temperature threshold
The difference of value and minimum temperature threshold is not more than 20 DEG C.
5. vacuum hotpressing stove temperature control system as claimed in claim 4, which is characterized in that the maximum temperature threshold value with it is minimum
The difference of temperature threshold is 5 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710693474.2A CN109387077A (en) | 2017-08-14 | 2017-08-14 | A kind of vacuum hotpressing stove temperature control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710693474.2A CN109387077A (en) | 2017-08-14 | 2017-08-14 | A kind of vacuum hotpressing stove temperature control system |
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| Publication Number | Publication Date |
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| CN109387077A true CN109387077A (en) | 2019-02-26 |
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ID=65416448
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| CN201710693474.2A Pending CN109387077A (en) | 2017-08-14 | 2017-08-14 | A kind of vacuum hotpressing stove temperature control system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003017425A (en) * | 2001-06-29 | 2003-01-17 | Sony Corp | Diffusion furnace type semiconductor manufacturing equipment |
| CN101462348A (en) * | 2008-10-27 | 2009-06-24 | 黄旭峰 | Electromagnetic heating system of injection mould machine |
| CN105783501A (en) * | 2016-03-16 | 2016-07-20 | 中国科学院宁波材料技术与工程研究所 | Vacuum hot-pressing sintering furnace |
| CN105964321A (en) * | 2016-06-30 | 2016-09-28 | 长安大学 | Device and method for heating asphalt in laboratory |
| CN106800419A (en) * | 2017-01-18 | 2017-06-06 | 太原科技大学 | A kind of preparation method of the enhanced Al-Mg-B ceramic material of SWCN |
-
2017
- 2017-08-14 CN CN201710693474.2A patent/CN109387077A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003017425A (en) * | 2001-06-29 | 2003-01-17 | Sony Corp | Diffusion furnace type semiconductor manufacturing equipment |
| CN101462348A (en) * | 2008-10-27 | 2009-06-24 | 黄旭峰 | Electromagnetic heating system of injection mould machine |
| CN105783501A (en) * | 2016-03-16 | 2016-07-20 | 中国科学院宁波材料技术与工程研究所 | Vacuum hot-pressing sintering furnace |
| CN105964321A (en) * | 2016-06-30 | 2016-09-28 | 长安大学 | Device and method for heating asphalt in laboratory |
| CN106800419A (en) * | 2017-01-18 | 2017-06-06 | 太原科技大学 | A kind of preparation method of the enhanced Al-Mg-B ceramic material of SWCN |
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Application publication date: 20190226 |
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