CN215517747U - Preparation device of germanium window material for large-size infrared optics - Google Patents
Preparation device of germanium window material for large-size infrared optics Download PDFInfo
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- CN215517747U CN215517747U CN202122351574.1U CN202122351574U CN215517747U CN 215517747 U CN215517747 U CN 215517747U CN 202122351574 U CN202122351574 U CN 202122351574U CN 215517747 U CN215517747 U CN 215517747U
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- heating system
- heat insulation
- window material
- infrared optics
- lifting device
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Abstract
The utility model discloses a preparation device of a large-size germanium window material for infrared optics, which comprises a heating system, a heat insulation system, a rotary lifting device and a die device, wherein the heating system is arranged in the heat insulation system, the die device is arranged in the heating system, the bottom of the die device is connected with the rotary lifting device, and the lower part of the rotary lifting device penetrates through the centers of the bottoms of the heating system and the heat insulation system. The method solves the practical problems that the existing equipment for preparing the germanium window material for the large-size infrared optics has complex equipment structure, great technical difficulty, low crystallization rate of the prepared germanium single crystal, difficult subsequent forming and processing, long running period, large raw material consumption and high production cost.
Description
Technical Field
The utility model relates to the technical field of production and processing of infrared optical materials and application thereof, in particular to a preparation device of a large-size germanium window material for infrared optics.
Background
The germanium single crystal material has the advantages of good infrared transmission performance, higher refractive index, low dispersion, no deliquescence, high mechanical strength, good chemical stability and the like, is widely applied to infrared detection and thermal imaging systems, is one of the most ideal infrared optical materials at present, is a preferred infrared material of an optical system (8-12 mu m wave band) of a thermal imager, and is used for processing infrared optical elements such as an infrared optical lens, an infrared optical window and the like. The national autonomous controllable requirements of infrared cameras or thermal imagers applied to satellite-borne, ship-borne and aircraft-borne systems are increasing day by day, and the devices need large-size germanium optical materials for manufacturing optical elements such as infrared optical lenses, infrared optical windows and the like of optical systems of the devices.
Germanium materials applied to infrared optics, electronics and solar energy generally need to be grown into germanium single crystals, and currently, the most common growth methods of the germanium single crystals mainly comprise a CZ (Czochralski) method and a VGF (vertical gradient freeze) method. The Czochralski method for growing the infrared germanium single crystal with the caliber less than 300mm is relatively mature, but the Czochralski method for growing the germanium single crystal with the caliber more than 300mm is still a process bottleneck and a technical short plate for the Czochralski growth of the germanium single crystal, and limits and restricts the development and application of a large-size infrared optical element.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device for preparing a large-size germanium window material for infrared optics, which solves the practical problems that the existing equipment for preparing the large-size germanium window material for infrared optics has complex equipment structure and great technical difficulty, the prepared germanium single crystal has low crystallization rate, and the following forming and processing are difficult, the running period is long, the raw material consumption is large, and the production cost is high.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a preparation device of a large-size germanium window material for infrared optics comprises a heating system, a heat insulation system, a rotary lifting device and a die device, wherein the heating system is arranged in the heat insulation system, the die device is arranged in the heating system, the bottom of the die device is connected with the rotary lifting device, and the lower part of the rotary lifting device penetrates through the centers of the bottoms of the heating system and the heat insulation system.
As a further preferable aspect of the present invention, the heating system includes an upper heater, a lower heater, and a bottom heater, the upper heater is disposed on an upper portion of an inner wall of the thermal insulation system, the lower heater is disposed on a lower portion of the inner wall of the thermal insulation system, and the bottom heater is disposed at a bottom of an inner cavity of the thermal insulation system.
As a further preferred aspect of the present invention, the thermal insulation system has a cylindrical structure.
As a further preferable mode of the present invention, the rotary lifting device includes a rotary shaft and a tray which are sequentially arranged from bottom to top, the top of the tray is connected with the bottom of the mold device, and the inner bottom surface of the mold device is a flat smooth surface.
As a further preferred of the present invention, the heating system, the thermal insulation system, the rotary lifting device and the mold device are all made of high purity hot-pressed graphite or composite carbon-carbon composite material.
As a further preferred aspect of the present invention, the heating system, the heat insulation system, the rotary elevating device and the mold device are all disposed in a vacuum furnace.
The device has a simple structure, and the method for preparing the large-size germanium window material for the infrared optics by using the device comprises the following steps:
s1, firstly, the mould device is lifted to the upper heating area of the heating system, and then the high-purity germanium ingot is loaded into the mould device, wherein the loading amount is determined by the shape, the thickness or the size of the prepared germanium crystal material;
s2, adding a dopant according to a certain mass ratio;
s3, vacuumizing, filling protective gas, starting an upper heater in a heating system, heating and melting the high-purity germanium ingot, cooling to a certain temperature after the high-purity germanium ingot is melted, keeping the temperature constant, and stirring and shaking uniformly;
s4, starting a lower heater and a bottom heater in the heating system again, raising the temperature to a certain temperature, and keeping the temperature constant, wherein the lower heater and the bottom heater in the heating system have a temperature difference with the upper heater;
s5, utilizing a rotary lifting device to downwards bring the die device to a lower heating area of the heating system at a constant speed of 5-40 mm/h;
s6, keeping the constant temperature of the lower heating area for 5-20 h;
s7, cooling the heating system to room temperature at the cooling rate of 3-15 ℃/h, and taking out the obtained germanium crystal after the temperature is reduced to the room temperature.
Compared with the prior art, the utility model can at least achieve one of the following beneficial effects:
1. the preparation device of the germanium window material for the large-size infrared optics has the advantages of simple structure, simplicity and convenience in operation and easiness in control.
2. The preparation device is used for manufacturing the large-size germanium window material for infrared optics, is efficient and rapid, saves raw materials, and is low in production cost.
Drawings
FIG. 1 is a schematic structural diagram of a device for preparing a large-size germanium window material for infrared optics according to the present invention.
FIG. 2 is a top view of the inventive die apparatus.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Specific example 1:
fig. 1 and 2 show a preparation device of a large-size germanium window material for infrared optics, which comprises a heating system 1, a heat insulation system 2, a rotating and lifting device 3 and a mold device 4, wherein the heating system 1 is arranged in the heat insulation system 2, the mold device 4 is arranged in the heating system 1, the bottom of the mold device 4 is connected with the rotating and lifting device 3, and the lower part of the rotating and lifting device 3 penetrates through the centers of the bottoms of the heating system 1 and the heat insulation system 2.
Specific example 2:
the present embodiment further describes the heating system 1 on the basis of the specific embodiment 1, where the heating system 1 includes an upper heater 11, a lower heater 12, and a bottom heater 13, the upper heater 11 is disposed on the upper portion of the inner wall of the thermal insulation system 2, the lower heater 12 is disposed on the lower portion of the inner wall of the thermal insulation system 2, and the bottom heater 13 is disposed at the bottom of the inner cavity of the thermal insulation system 2.
Specific example 3:
this embodiment is further described with reference to the specific embodiment 1, wherein the thermal insulation system 2 is a cylindrical structure.
Specific example 4:
the embodiment further describes the rotating and lifting device 3 on the basis of specific embodiment 1, the rotating and lifting device 3 includes a rotating shaft 31 and a tray 32 which are sequentially arranged from bottom to top, the top of the tray 32 is connected with the bottom of the mold device 4, and the inner bottom surface of the mold device 4 is a flat smooth surface.
Specific example 5:
in this embodiment, the manufacturing materials of the heating system 1, the thermal insulation system 2, the rotary lifting device 3 and the mold device 4 are further described on the basis of the specific embodiment 1, and the heating system 1, the thermal insulation system 2, the rotary lifting device 3 and the mold device 4 are all made of high-purity hot-pressed graphite or composite carbon-carbon composite material.
Specific example 6:
in this embodiment, the arrangement positions of the heating system 1, the thermal insulation system 2, the rotary lifting device 3 and the mold device 4 are further described on the basis of the specific embodiment 1, and the heating system 1, the thermal insulation system 2, the rotary lifting device 3 and the mold device 4 are all arranged in the vacuum furnace.
The device has a simple structure, and the method for preparing the large-size germanium window material for the infrared optics by using the device comprises the following steps:
s1, firstly, the mould device is lifted to the upper heating area of the heating system, and then the high-purity germanium ingot is loaded into the mould device, wherein the loading amount is determined by the shape, the thickness or the size of the prepared germanium crystal material;
s2, adding a dopant according to a certain mass ratio;
s3, vacuumizing, filling protective gas, starting an upper heater in a heating system, heating and melting the high-purity germanium ingot, cooling to a certain temperature after the high-purity germanium ingot is melted, keeping the temperature constant, and stirring and shaking uniformly;
s4, starting a lower heater and a bottom heater in the heating system again, raising the temperature to a certain temperature, and keeping the temperature constant, wherein the lower heater and the bottom heater in the heating system have a temperature difference with the upper heater;
s5, utilizing a rotary lifting device to downwards bring the die device to a lower heating area of the heating system at a constant speed of 5-40 mm/h;
s6, keeping the constant temperature of the lower heating area for 5-20 h;
s7, cooling the heating system to room temperature at the cooling rate of 3-15 ℃/h, and taking out the obtained germanium crystal after the temperature is reduced to the room temperature.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.
Claims (6)
1. The preparation device of the large-size germanium window material for the infrared optics is characterized by comprising a heating system (1), a heat insulation system (2), a rotary lifting device (3) and a die device (4), wherein the heating system (1) is arranged in the heat insulation system (2), the die device (4) is arranged in the heating system (1), the bottom of the die device (4) is connected with the rotary lifting device (3), and the lower part of the rotary lifting device (3) penetrates through the centers of the bottoms of the heating system (1) and the heat insulation system (2).
2. The apparatus for preparing a germanium window material for large-size infrared optics according to claim 1, wherein: the heating system (1) comprises an upper heater (11), a lower heater (12) and a bottom heater (13), wherein the upper heater (11) is arranged on the upper part of the inner wall of the heat insulation and preservation system (2), the lower heater (12) is arranged on the lower part of the inner wall of the heat insulation and preservation system (2), and the bottom heater (13) is arranged at the bottom of the inner cavity of the heat insulation and preservation system (2).
3. The apparatus for preparing a germanium window material for large-size infrared optics according to claim 1, wherein: the heat insulation system (2) is of a cylindrical structure.
4. The apparatus for preparing a germanium window material for large-size infrared optics according to claim 1, wherein: rotation elevating gear (3) axis of rotation (31) and tray (32) that set gradually including from the bottom up, the top of tray (32) meets with the bottom of die set (4), the interior bottom surface of die set (4) is smooth surface.
5. The apparatus for preparing a germanium window material for large-size infrared optics according to claim 1, wherein: the heating system (1), the heat insulation system (2), the rotary lifting device (3) and the die device (4) are all made of high-purity hot-pressed graphite or composite carbon-carbon composite materials.
6. The apparatus for preparing a germanium window material for large-size infrared optics according to claim 1, wherein: the heating system (1), the heat insulation system (2), the rotary lifting device (3) and the mould device (4) are all arranged in the vacuum furnace.
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| CN202122351574.1U CN215517747U (en) | 2021-09-27 | 2021-09-27 | Preparation device of germanium window material for large-size infrared optics |
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| CN202122351574.1U CN215517747U (en) | 2021-09-27 | 2021-09-27 | Preparation device of germanium window material for large-size infrared optics |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113862772A (en) * | 2021-09-27 | 2021-12-31 | 云南北方光学科技有限公司 | Preparation device of germanium window material for large-size infrared optics and method for preparing germanium window material for large-size infrared optics by using preparation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113862772A (en) * | 2021-09-27 | 2021-12-31 | 云南北方光学科技有限公司 | Preparation device of germanium window material for large-size infrared optics and method for preparing germanium window material for large-size infrared optics by using preparation device |
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Effective date of registration: 20220124 Address after: 650000 No. 31 East Road, Wuhua District, Yunnan, Kunming Patentee after: KUNMING INSTITUTE OF PHYSICS Patentee after: Yunnan North Optical Technology Co., Ltd Address before: 650000 workshop 102, No. 5, infrared Road, economic development zone, Kunming area, China (Yunnan) pilot Free Trade Zone, Kunming, Yunnan Patentee before: Yunnan North Optical Technology Co.,Ltd. |