Sagger for preparing aluminum nitride powder

Abstract

The utility model discloses a sagger for preparing aluminum nitride powder, which belongs to the field of preparation of aluminum nitride powder and comprises a square bottom plate, three fixed side walls surrounding the periphery of the square bottom plate and a movable plugboard side wall, and the bottom plate, the three fixed side walls and the plugboard side wall form a concave cavity for accommodating the powder. The side wall of the inserting plate can be conveniently pulled out and inserted, so that transferring and discharging operation is more convenient, materials are prevented from being accumulated at dead corners of the sagger, the workload of cleaning the sagger is reduced, and the operation efficiency of transferring the materials is improved. And the transverse handle structure and the vertical handle structure are arranged outside the fixed side wall, so that the difficulty of operating the saggar by personnel is reduced, the risk in the saggar transferring process is reduced, and the operation efficiency of discharging and charging is improved. And step-shaped edges designed at the tops of the fixed side walls and the inserting plate side walls are matched with groove structures designed at the inner edges of the bottoms of the fixed side walls and the inserting plate side walls, so that the upper saggar and the lower saggar are conveniently aligned and positioned during operation, meanwhile, the stacking structure is more stable, and more layers of saggars can be stacked.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of aluminum nitride powder preparation, especially relates to a sagger for preparing aluminum nitride powder. BACKGROUND

[0002] Carbon thermal reduction method is one of the methods commonly used for producing aluminum nitride powder, which usually uses high-purity carbon black as carbon source and alumina or aluminum hydroxide as aluminum source, mixes the aluminum source and carbon source uniformly to serve as the precursor of carbon thermal reduction reaction, places the precursor in nitrogen to fully nitride, obtains the mixture of aluminum nitride powder and carbon black, and removes the excess carbon black through oxidation reaction to obtain high-purity aluminum nitride powder.

[0003] The commonly used nitriding method is to use a multilayer graphite sagger with gas-permeable side walls to load and nitride, and the excess carbon source is often left after sintering of the aluminum nitride powder, so that decarburization treatment needs to be carried out in an oxygen-containing environment, and thus the aluminum nitride powder needs to be transferred from the graphite sagger to an oxygen-resistant reaction container, the graphite sagger is prone to leaving powder on the bottom edge in the direction of pouring the powder when pouring the powder, and manual cleaning is needed, which causes incomplete transfer of the material and time-consuming and laborious cleaning of the sagger; in addition, the graphite material has a smooth surface and is prone to slipping during lifting and dragging. SUMMARY

[0004] The utility model aims at providing a sagger for preparing aluminum nitride powder, which can directly pour out all the material at a small inclination angle when transferring the material, reduces the workload of transferring the material and cleaning the sagger, and can be stacked to improve production efficiency.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0006] A sagger for preparing aluminum nitride powder, which comprises a square bottom plate, three fixed side walls surrounding the square bottom plate, and a movable plug-in plate side wall, and the bottom plate, the three fixed side walls, and the plug-in plate side wall form a concave cavity for containing the powder.

[0007] The utility model technical scheme is further improved in that one edge of the bottom plate is provided with a slot, and the plug-in plate side wall is in the shape of an inverted "U", and the protruding part at the bottom of the plug-in plate side wall matches the slot.

[0008] The utility model technical scheme is further improved in that the inner edge of the bottom of the three fixed side walls and the plug-in plate side wall is provided with a groove, and the top edge of the three fixed side walls and the plug-in plate side wall is in the shape of a step, and when the saggars are stacked one on top of another, the groove of the upper sagger and the top of the fixed side wall and the plug-in plate side wall of the lower sagger are completely buckled.

[0009] The further improvement of the utility model technical scheme lies in: the two fixed side walls adjacent to the plug-in side wall are provided with a gas port for gas circulation in the middle position.

[0010] The further improvement of the utility model technical scheme lies in: the two fixed side walls adjacent to the plug-in side wall are provided with a gas port for gas circulation in the middle position.

[0011] The further improvement of the utility model technical scheme lies in: the two fixed side walls adjacent to the plug-in side wall are provided with a gas port for gas circulation in the middle position.

[0012] The further improvement of the utility model technical scheme lies in: the two fixed side walls adjacent to the plug-in side wall are provided with a gas port for gas circulation in the middle position.

[0013] The further improvement of the utility model technical scheme lies in: the two fixed side walls adjacent to the plug-in side wall are provided with a gas port for gas circulation in the middle position.

[0014] Due to the adoption of the above technical scheme, the utility model has the following technical progress:

[0015] The plug-in side wall of the application can be conveniently plugged in and out, so that the material transfer and discharging operation is more convenient, the material accumulation in the dead angle of the saggar is avoided, the workload of cleaning the saggar is reduced, and the operation efficiency of the material transfer is improved.

[0016] The horizontal and vertical handle structures arranged outside the fixed side wall of the application reduce the difficulty of the personnel operation of the saggar, reduce the risk in the saggar transfer process, and improve the operation efficiency of the discharging and loading.

[0017] The stepped edge designed at the top of the fixed side wall and the plug-in side wall of the application cooperates with the groove structure designed at the inner edge of the bottom of the fixed side wall and the plug-in side wall, so that the upper and lower saggars are conveniently aligned and positioned during operation, and the stacking structure is also more stable, and more layers of saggars can be stacked. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a saggar structure schematic view for preparing aluminum nitride powder.

[0019] 1, fixed side wall, 2, plug-in side wall, 3, bottom plate, 4, horizontal handle, 5, vertical handle, 7, groove, 8, sliding rail groove, 9, plug-in groove, 10, anti-skid groove, 11, gas port. DETAILED DESCRIPTION

[0020] The utility model will be further described in detail in combination with the embodiments as follows:

[0021] For example, Figure 1The illustrated, a kind of for preparing the anvil of aluminium nitride powder, including square bottom plate 3, three fixed side walls surrounding in square bottom plate 3 four around and one movable insert plate side wall 2, bottom plate 3 and three fixed side walls and insert plate side wall 2 constitute the recess of containing powder.The intermediate position of two fixed side walls 1 adjacent to insert plate side wall 2 is provided with the gas port 11 for gas flow passing downwards recessed.I.e.the fixed side wall 1 recessed in the middle of adjacent to insert plate side wall 2, when multiple anvil stacks, the gas port 11 in the middle of fixed side wall 1 forms the passage for gas flow passing.

[0022] Bottom plate 3 one edge is provided with the slot 9, and the insert plate side wall 2 is inverted " convex " character, and the convex portion at the bottom thereof is matched with the slot 9.The insert plate side wall 2 is fixed to the bottom plate 3 by being inserted into the slot 9 of the bottom plate 3.

[0023] A preferred embodiment, the end of two fixed side walls 1 adjacent to insert plate side wall 2 is provided with the slide rail groove 8 with the thickness of insert plate side wall 2, and the insert plate side wall 2 is inserted and pulled out through the slide rail groove 8 on the fixed side wall and the slot 9 on the bottom plate, and it is more conducive to the insertion and fixation of the insert plate side wall 2.The design of insert plate side wall 2 makes subsequent carbon removal and raw material transfer more convenient.

[0024] A preferred embodiment, the inner edge of the bottom of three fixed side walls and one insert plate side wall 2 is provided with the groove 7, and the top edge of three fixed side walls and one insert plate side wall 2 is in a stepped shape, and when the anvil is stacked up and down, the groove 7 of the upper anvil is completely buckled with the top of the fixed side wall and the insert plate side wall of the lower anvil.I.e.the edge of the bottom of three fixed side walls and one insert plate side wall is also in a stepped shape, and the inner edge is recessed, and the top edge of three fixed side walls and one insert plate side wall is in a stepped shape, and the inner circle is convex, so that when the anvil is stacked up and down, the three fixed side walls and one insert plate side wall of the upper and lower anvil can be completely buckled, so that the stacked structure is more stable, more anvil can be stacked, and the upper and lower stacked anvil can be prevented from slipping off in the case of transfer and inclination.

[0025] A preferred embodiment, the anvil includes the above structure, and further includes horizontal transverse handle 4 and vertical vertical handle 5 on the outer side of two fixed side walls 1 adjacent to insert plate side wall 2.

[0026] More preferably, the transverse handle 4 and the vertical handle 5 form a transverse " T " shaped handle, and the " T " shaped handle is symmetrically provided with two at both ends of the fixed side wall, the vertical handle 5 is close to the edge of the fixed side wall, and the transverse handle 4 is transversely arranged on the fixed side wall close to the vertical handle 5.The design of handle facilitates manual operation of the anvil.

[0027] More preferably, the outer side of the insert plate side wall 2 is transversely provided with the anti-skid groove 10, which is more convenient for manual operation, so that the insertion and extraction of the insert plate side wall is more smooth.

[0028] Working principle or method for use:

[0029] Multiple sagger is equipped with aluminum nitride precursor, alignment, make the fixed side wall of the lower sagger and the stepped edge of the top of the plug plate side wall and the groove of the bottom of the upper sagger, placed in the nitriding furnace for nitriding reaction, nitrogen through the gas port through the sagger participates in the nitriding reaction, after nitriding, the sagger is pulled out of the nitriding furnace through the vertical handle, then the uppermost sagger is lifted and transferred to the carbon removal container through the horizontal handle and the fixed side wall, the plug plate side wall is pulled out by holding the anti-skid groove on the plug plate side wall with fingers, the sagger is inclined to the opening direction, and the nitrided raw material can be directly poured into the carbon removal crucible for carbon removal operation.

Claims

1. A crucible for preparing aluminum nitride powder, characterized in that: It includes a square bottom plate (3), three fixed side walls surrounding the square bottom plate (3) on all four sides, and a movable plug side wall (2). The bottom plate (3), the three fixed side walls, and the plug side wall (2) form a concave cavity for accommodating powder.

2. The crucible for preparing aluminum nitride powder according to claim 1, characterized in that: A slot (9) is provided at one edge of the bottom plate (3). The plug side wall (2) is in an inverted "convex" shape, and the protruding part at its bottom is matched with the slot (9).

3. The crucible for preparing aluminum nitride powder according to claim 1, characterized in that: Grooves (7) are provided at the inner edges of the bottoms of the three fixed side walls and the one plug side wall (2). The top edges of the three fixed side walls and the one plug side wall (2) are stepped. When the saggers are stacked up and down, the grooves (7) of the upper sagger and the tops of the fixed side walls and the plug side wall of the lower sagger are completely buckled.

4. The crucible for preparing aluminum nitride powder according to claim 3, characterized in that: Air vents (11) for gas flow are provided in the middle positions of the two fixed side walls (1) adjacent to the plug side wall (2), which are recessed downward.

5. A crucible for preparing aluminum nitride powder according to claim 2, characterized in that: Sliding rail grooves (8) adapted to the thickness of the plug side wall (2) are provided at one ends of the two fixed side walls (1) adjacent to the plug side wall (2).

6. A sagger for preparing aluminum nitride powder according to claim 1, characterized in that: Horizontal cross handles (4) and vertical vertical handles (5) are provided on the outer sides of the two fixed side walls (1) adjacent to the plug side wall (2).

7. A crucible for preparing aluminum nitride powder according to claim 6, characterized in that: The cross handle (4) and the vertical handle (5) form a horizontal "T" - shaped handle, and two "T" - shaped handles are symmetrically arranged at both ends of the fixed side wall.

8. A crucible for preparing aluminum nitride powder according to claim 3, characterized in that: Anti - slip grooves (10) are provided horizontally on the outer side of the plug side wall (2).

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