CN217479589U - Hearth device and crystal furnace - Google Patents
Hearth device and crystal furnace Download PDFInfo
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- CN217479589U CN217479589U CN202221433212.5U CN202221433212U CN217479589U CN 217479589 U CN217479589 U CN 217479589U CN 202221433212 U CN202221433212 U CN 202221433212U CN 217479589 U CN217479589 U CN 217479589U
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Abstract
The utility model belongs to the technical field of crystal hot melting growth equipment, and discloses a furnace chamber device and a crystal furnace, wherein the crystal furnace comprises the furnace chamber device, the furnace chamber device comprises a furnace body and a supporting device, a furnace chamber is formed inside the furnace body, a heating element is arranged in the furnace chamber, a gradient brick is arranged in the furnace chamber, at least three central holes are arranged in the gradient brick along the vertical direction, and the opening size of the central holes is reduced from top to bottom in sequence; the supporting device is provided with a crucible, the supporting device drives the crucible to enter and exit the hearth, and the crucible can load materials to penetrate through the center hole. The utility model discloses reduce the opening size top-down of centre bore in proper order to form the longitudinal temperature gradient region in furnace, improve the crystallization quality of material in the longitudinal temperature gradient region.
Description
Technical Field
The utility model relates to a crystal hot melt growth equipment technical field especially relates to a furnace device and crystal stove.
Background
The Bridgman method is an important melt monocrystal growth method, and when crystal hot-melt growth equipment is adopted for production, a high-temperature melting area and a crystallization area are formed by the arrangement of a heating element and heat insulation materials in a hearth, so that the aim of growing monocrystals is fulfilled. However, the existing crystal hot melting growth equipment is difficult to grow in a crystallization area to obtain alkaline earth-rare earth borate crystals with good integrity, no bubbles and no inclusion, especially large-size alkaline earth-rare earth borate crystals, and due to the physical properties and chemical properties of the crystals, the crystals crack, the bubbles, the inclusions and other macroscopic defects are serious, the existing crystal hot melting growth equipment is not suitable for growth by using the traditional crystal hot melting growth equipment, and the large-size alkaline earth-rare earth borate crystals with excellent quality cannot be obtained.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an aim at: the opening size of the central hole is sequentially reduced from top to bottom so as to form a longitudinal temperature gradient area in the hearth and improve the crystallization quality of materials in the longitudinal temperature gradient area.
To achieve the purpose, the utility model adopts the following technical proposal:
in a first aspect, a furnace apparatus is provided, comprising:
the furnace comprises a furnace body, wherein a hearth is formed in the furnace body, a heating element is arranged in the hearth, a gradient brick is arranged in the hearth, at least three central holes are formed in the gradient brick along the vertical direction, and the opening sizes of the central holes are sequentially reduced from top to bottom;
the supporting device is provided with a crucible, the supporting device drives the crucible to enter and exit the hearth, and the crucible can load materials and penetrate through the center hole.
As an optional technical solution, the opening of the central hole is a circular hole; the central holes on the gradient bricks are concentrically arranged.
As an optional technical scheme, the diameter of the central hole is reduced from top to bottom at equal intervals, and the depth of each central hole is the same.
As an optional technical scheme, the outer peripheral cover of the crucible is provided with a heat insulation ring.
As an optional technical solution, a distance between a hole wall of the central hole of the bottommost layer and the heat insulation ring is less than or equal to 10 cm.
As an optional technical solution, a distance between a hole wall of the central hole of the bottommost layer and the heat insulation ring is greater than or equal to 5 cm.
As an optional technical solution, the heat insulation ring is fixedly mounted on the supporting device, and the heat insulation ring and the crucible move synchronously;
the heat insulation ring is made of sandstone; or gravels are embedded in the ring body of the heat insulation ring.
As an optional technical scheme, the gradient brick is made of a heat-insulating refractory material;
the furnace body is made of heat-preservation refractory materials, or a heat-preservation refractory layer is arranged on the inner wall of the furnace body, or the furnace body is made of heat-preservation refractory materials, and the heat-preservation refractory layer is arranged on the inner wall of the furnace body.
As an optional technical scheme, a bottom furnace mouth is formed at the bottom of the furnace body, the supporting device drives the crucible to penetrate through the bottom furnace mouth and enter the furnace chamber, a top furnace mouth is formed at the top of the furnace body, and the heating element penetrates through the top furnace mouth from the top to enter the furnace chamber;
the furnace cover is tightly assembled at the top furnace mouth;
the side wall of the furnace body is provided with a temperature measuring hole communicated with the hearth, and the temperature measuring hole is used for avoiding a temperature measuring part so that the temperature measuring part extends into the hearth to measure the temperature.
In a second aspect, a crystal furnace is provided, which comprises the hearth device;
the furnace body is a shell of the crystal furnace; or the furnace body is made of heat-insulating refractory materials, a furnace shell is further arranged on the periphery of the furnace body, and the furnace body is a heat-insulating layer of the crystal furnace.
The beneficial effects of the utility model reside in that:
the utility model provides a furnace device and crystal growing furnace, this crystal growing furnace include the furnace device, and the furnace device includes furnace body and strutting arrangement, places the material in the crucible, and strutting arrangement drives the crucible and gets into furnace, and the crucible loads the material and passes the centre bore, and crucible and material remove to the top of centre bore, and after heating member heating preset time in furnace, the material hot melt reaches and predetermines the degree, and strutting arrangement drives the crucible and wears out the centre bore and shift out furnace, the utility model discloses reduce the open size top-down of centre bore in proper order, form vertical temperature gradient region in furnace, after the crucible passed vertical temperature gradient region, the material formed the great seed crystal of high quality and size in the bottom of crucible, improved the crystallization quality of material.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and examples;
FIG. 1 is a sectional view of a furnace assembly according to an embodiment.
In the figure:
1. a furnace body; 11. a hearth; 12. a bottom furnace mouth; 13. a temperature measuring hole;
2. a heating member;
3. gradient bricks; 31. a central bore;
4. a support device;
5. a crucible;
6. a heat insulation ring;
7. a furnace cover.
Detailed Description
In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are used in an orientation or positional relationship based on what is shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The embodiment provides a crystal furnace, which comprises a hearth device, as shown in fig. 1, wherein the hearth device comprises a furnace body 1 and a supporting device 4, a hearth 11 is formed in the furnace body 1, a heating element 2 is arranged in the hearth 11, a gradient brick 3 is arranged in the hearth 11, at least three central holes 31 are formed in the gradient brick 3 along the vertical direction, and the opening sizes of the central holes 31 are sequentially reduced from top to bottom; the supporting device 4 is provided with a crucible 5, the supporting device 4 drives the crucible 5 to enter and exit the hearth 11, and the crucible 5 can load materials and penetrate through the central hole 31.
In other embodiments, the supporting device 4 drives the crucible 5 into the hearth 11 from the top of the furnace body 1; in this embodiment, the supporting device 4 drives the crucible 5 into the hearth 11 from the bottom of the furnace body 1.
Specifically, the hearth 11 is a three-dimensional space, the material is placed in the crucible 5, the supporting device 4 drives the crucible 5 to enter the hearth 11, the crucible 5 loads the material and penetrates through the central hole 31, the crucible 5 and the material move to the position above the central hole 31, the heating element 2 is heated in the hearth 11 for a preset time, the material is hot-melted to a preset degree, the supporting device 4 drives the crucible 5 to penetrate out of the central hole 31 and move out of the hearth 11, the opening size of the central hole 31 is sequentially reduced from top to bottom, a longitudinal temperature gradient region is formed in the hearth 11, temperature values in the longitudinal temperature gradient region are sequentially decreased from top to bottom, after the crucible 5 penetrates through the longitudinal temperature gradient region, the material forms high-quality and large-size seed crystals at the bottom of the crucible 5, and the crystallization quality of the material is improved.
In this embodiment, the gradient bricks 3 in the furnace 11 are three, each gradient brick 3 is provided with a central hole 31, and the three central holes 31 are concentrically arranged. The diameter of the central hole 31 of the gradient brick 3 at the top position is a first preset value, the diameter of the central hole 31 of the gradient brick 3 at the middle position is a second preset value, the diameter of the central hole 31 of the gradient brick 3 at the bottom position is a third preset value, and the difference between the first preset value and the second preset value is equal to the difference between the second preset value and the third preset value. In other embodiments, one gradient brick 3 is arranged in the hearth 11, three central holes 31 are arranged on the gradient brick 3, two of the central holes 31 are blind holes, the central hole 31 at the bottommost layer is a through hole, the three central holes 31 are concentrically arranged, and the diameters of the three central holes 21 are sequentially reduced from top to bottom; alternatively, four gradient bricks 3 are arranged in the hearth 11, and the difference between the diameters of the two adjacent central holes 31 is equal. The specific number of gradient bricks 3 of the present embodiment can be set according to the data requirements.
In the present embodiment, the center hole 31 is a circular hole; in other embodiments, the central hole 31 is a square hole or an elliptical hole.
Alternatively, the diameter of the central hole 31 is reduced from top to bottom at equal intervals, and the depth of each central hole 31 is the same. In this embodiment, the thickness of the gradient brick 3 in the vertical direction can be set according to actual needs, and the thickness of the three gradient bricks 3 is set to be the same, i.e. the depth of the three central holes 31 is the same.
Optionally, the heating member 2 is a resistance heating rod or a resistance heating wire.
Alternatively, the heating member 2 is provided in 4 to 8 pieces.
Optionally, the outer periphery of the crucible 5 is covered with a heat insulating ring 6. A more stable temperature gradient is formed inside the heat insulation ring 6, so that a single crystal can be more reasonably grown from the materials in the crucible 5.
Optionally, the distance between the hole wall of the central hole 31 at the bottommost layer and the heat insulation ring 6 is less than or equal to 10 cm.
Optionally, the distance between the hole wall of the central hole 31 at the bottommost layer and the heat insulation ring 6 is greater than or equal to 5 cm. In the present embodiment, the distance between the hole wall of the central hole 31 of the bottommost layer and the heat insulating ring 6 is more than 5cm and less than 10cm, for example, 5cm, 6cm, 7cm, 8cm, 9cm, 10 cm.
Optionally, the wall thickness of the heat insulation ring 6 is 2mm to 8 mm.
In some embodiments, the insulating ring 6 is made of sand; in this embodiment, the heat insulating ring 6 has sand embedded in the ring body.
In this embodiment, the insulating ring 6 is fixedly mounted on the support 4, and the insulating ring 6 moves synchronously with the crucible 5 to maintain the crucible 5 in a stable temperature gradient zone. In other embodiments, the heat-insulating ring 6 is fixedly connected with the furnace body 1, and the crucible 5 is fixedly connected with the supporting device 4.
Optionally, the gradient bricks 3 are made of heat-insulating refractory materials.
Optionally, the furnace body 1 is made of a heat-insulating refractory material, for example, a microporous foamed ceramic light heat-insulating refractory material, and can be continuously maintained for more than 600 hours at a high temperature of 1600 ℃; in some embodiments, the inner wall of the furnace body 1 is provided with a heat-insulating refractory layer; or, the furnace body 1 is made of heat-insulating refractory material, and the inner wall of the furnace body 1 is provided with a heat-insulating refractory layer.
Optionally, a bottom furnace opening 12 is formed in the bottom of the furnace body 1, and the supporting device 4 drives the crucible 5 to lift and penetrate through the bottom furnace opening 12 and enter the furnace 11.
Optionally, a top furnace opening is formed at the top of the furnace body 1, and the heating element 2 penetrates through the top furnace opening from the top to enter the hearth 11.
Optionally, the top furnace opening is tightly fitted with a furnace lid 7. Furnace 11 is cylindrical structure, and the diameter of top fire door is less than the external diameter of bell 7 and the difference is between 1mm to 5mm, closely assembles bell 7 in top fire door, can avoid the heat to spill to the external world from top fire door.
Optionally, a temperature measuring hole 13 communicated with the furnace chamber 11 is formed in the side wall of the furnace body 1, and the temperature measuring hole 13 is used for avoiding a temperature measuring piece, so that the temperature measuring piece extends into the furnace chamber 11 to measure temperature. The temperature measuring hole 13 is formed along the X-axis direction, the diameter of the temperature measuring hole 13 is 6mm to 10mm, the temperature measuring part is a thermocouple, and the thermocouple penetrates through the temperature measuring hole 13 and extends into the hearth 11, so that the temperature in the hearth 11 is monitored.
Optionally, the furnace body 1 is a shell of a crystal furnace; or, the furnace body 1 is made of heat-insulating refractory materials, a furnace shell is further arranged on the periphery of the furnace body 1, and the furnace body 1 is a heat-insulating layer of the crystal furnace.
When the furnace body 1 is a heat insulation layer of a crystal furnace, the furnace body 1 can be integrally manufactured, or consists of furnace walls with two semicircular structures, or consists of furnace walls with four fan-shaped structures, or is formed by stacking a plurality of sections of circular furnaces along the vertical direction, and when the furnace body 1 is loaded into a furnace shell, the furnace body can be loaded into the furnace shell one by one from bottom to top in a whole or in blocks.
Optionally, the lifting device is further included, and the lifting device is connected with the supporting device 4 and is used for driving the supporting device 4 to move in the vertical direction. The lifting device comprises a power part which can lift up and move the supporting device 4 along the vertical direction. The power part can be selected as a motor or a cylinder or an electric cylinder.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A hearth apparatus, comprising:
the furnace comprises a furnace body (1), wherein a hearth (11) is formed in the furnace body (1), a heating element (2) is arranged in the hearth (11), a gradient brick (3) is arranged in the hearth (11), at least three central holes (31) are formed in the gradient brick (3) along the vertical direction, and the sizes of the openings of the central holes (31) are sequentially reduced from top to bottom;
the crucible furnace comprises a supporting device (4), wherein a crucible (5) is arranged on the supporting device (4), the supporting device (4) drives the crucible (5) to enter and exit the furnace chamber (11), and the crucible (5) can be loaded with materials to penetrate through a center hole (31).
2. A furnace arrangement according to claim 1, characterized in that the opening of the central hole (31) is a circular hole; the central holes (31) on the gradient bricks (3) are concentrically arranged.
3. A furnace device according to claim 2, characterized in that the diameter of the central hole (31) decreases equidistantly from top to bottom, and the depth of each central hole (31) is the same.
4. A furnace arrangement according to claim 1, characterized in that the outer circumference of the crucible (5) is covered with a heat insulating ring (6).
5. A furnace device according to claim 4, characterized in that the distance between the wall of the central hole (31) of the lowest layer and the heat insulating ring (6) is less than or equal to 10 cm.
6. A furnace device according to claim 5, characterized in that the distance between the wall of the central hole (31) of the lowest layer and the heat insulating ring (6) is greater than or equal to 5 cm.
7. A hearth arrangement according to claim 4, characterised in that the heat insulating ring (6) is fixedly mounted on the support means (4), the heat insulating ring (6) moving synchronously with the crucible (5);
the heat insulation ring (6) is made of sandstone; or gravels are embedded in the ring body of the heat insulation ring (6).
8. The hearth arrangement according to claim 1, characterized in that said gradient bricks (3) are made of insulating refractory material;
the furnace body (1) is made of heat-preservation refractory materials, or a heat-preservation refractory layer is arranged on the inner wall of the furnace body (1), or the furnace body (1) is made of heat-preservation refractory materials, and the heat-preservation refractory layer is arranged on the inner wall of the furnace body (1).
9. The hearth device according to claim 1, characterized in that the bottom of the furnace body (1) is provided with a bottom furnace opening (12), the supporting device (4) drives the crucible (5) to pass through the bottom furnace opening (12) and enter the hearth (11), the top of the furnace body (1) is provided with a top furnace opening, and the heating element (2) passes through the top furnace opening from the top to enter the hearth (11);
the top furnace mouth is tightly provided with a furnace cover (7);
the side wall of the furnace body (1) is provided with a temperature measuring hole (13) communicated with the hearth (11), and the temperature measuring hole (13) is used for avoiding a temperature measuring piece so that the temperature measuring piece can extend into the hearth (11) to measure the temperature.
10. A crystal growing furnace comprising a hearth arrangement according to any one of claims 1 to 9;
the furnace body (1) is a shell of the crystal furnace; or, the furnace body (1) is made of heat-preservation refractory materials, a furnace shell is further arranged on the periphery of the furnace body (1), and the furnace body (1) is a heat-preservation layer of the crystal furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221433212.5U CN217479589U (en) | 2022-06-09 | 2022-06-09 | Hearth device and crystal furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221433212.5U CN217479589U (en) | 2022-06-09 | 2022-06-09 | Hearth device and crystal furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217479589U true CN217479589U (en) | 2022-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221433212.5U Active CN217479589U (en) | 2022-06-09 | 2022-06-09 | Hearth device and crystal furnace |
Country Status (1)
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|---|---|
| CN (1) | CN217479589U (en) |
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2022
- 2022-06-09 CN CN202221433212.5U patent/CN217479589U/en active Active
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