High-temperature atmosphere revolving furnace and application thereof in preparation of AION (Anterior Ischemic Optic Neuropathy) powder

A rotary furnace and atmosphere technology, applied in high temperature atmosphere rotary furnace and its application in the preparation of A1ON powder, can solve the problems of poor uniformity of A1ON powder, achieve small grain size, sufficient and uniform reaction, high purity effect

Active Publication Date: 2013-12-25
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to factors such as the complexity of the A1ON material structure, there is also the problem of poor uniformity of the synthesized A1ON powder

Method used

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  • High-temperature atmosphere revolving furnace and application thereof in preparation of AION (Anterior Ischemic Optic Neuropathy) powder
  • High-temperature atmosphere revolving furnace and application thereof in preparation of AION (Anterior Ischemic Optic Neuropathy) powder
  • High-temperature atmosphere revolving furnace and application thereof in preparation of AION (Anterior Ischemic Optic Neuropathy) powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The structure of the high-temperature atmosphere rotary furnace described in this embodiment is as follows: figure 1 As shown, it includes a furnace body 1, a crucible 4, a connecting body 43, a heating and heat preservation assembly 5, and a motor 2 that drives the crucible to rotate; The structure is as figure 2 As shown, it is composed of a crucible main body 41 and an end cover 42. The crucible main body 41 and the end cover 42 are both made of graphite, and its shape is a cylinder with one end closed and one end open. The internal thread section is provided with an external thread section connected to the connecting body on the closed end face, and the end cover 42 is provided with an external thread section matching the open end of the crucible main body and a vent hole 44 with a diameter of 2 mm; the connecting body 43 is made of graphite , whose structure is as image 3 As shown, it consists of a conical body with an internal thread section at one end and an ...

Embodiment 2

[0032] The structure of the high-temperature atmosphere rotary furnace described in this embodiment is as follows: figure 1As shown, it includes a body of furnace 1, a crucible 4, a heating and heat preservation assembly 5 and a motor 2 that drives the rotation of the crucible; the body of furnace is provided with an intake pipe 6, an air discharge pipe 7 and a vacuum valve 8, and the structure of the crucible is as follows figure 2 As shown, it is composed of a crucible main body 41 and an end cover 42. The end cover 42 is made of graphite. The crucible main body 41 uses graphite as a matrix, and the surface of the inner cavity of the matrix is ​​covered with a tantalum layer. The inner hole of the open end is provided with an internal thread section connected to the end cap, and the end face of the closed end is provided with an external thread section connected with the connecting body. The end cover 42 is provided with an external thread section matching the open end of th...

Embodiment 3

[0035] In this example, the A10N powder was prepared by using the high-temperature atmosphere rotary furnace described in Example 1.

[0036] Nanoscale γ-A1 2 o 3 powder and nano-scale high-purity carbon black as raw materials, according to γ-A1 2 o 3 The content of the powder is 94.4wt%, the content of carbon black is 5.6wt% to carry out batching, 50g of mixed powder is added in the polyurethane tank, according to powder-ball ratio=1:12, add zirconium dioxide grinding balls in the polyurethane tank, with no Water and ethanol are used as the ball milling medium, and the rotating speed is 300r / min. The mixed powder is mixed by wet ball milling, and the ball milling time is 24h. The slurry obtained by ball milling was stirred and dried at 75°C, and the dried powder was passed through a 140-mesh sieve, and 20 g of the sieved powder was placed in an alumina crucible matching the size of the crucible main body 41, and the oxidized Put the aluminum crucible into the crucible mai...

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Abstract

The invention belongs to the field of high-temperature atmosphere furnaces, and provides a high-temperature atmosphere revolving furnace. The high-temperature atmosphere revolving furnace comprises a furnace body, a crucible and a heating insulation assembly which are positioned in the furnace body and a motor which is used for driving the crucible to rotate, wherein a gas inlet pipe, an exhaust pipe and a vacuum valve are arranged on the furnace body; the furnace body and the crucible are positioned horizontally; one end of the crucible is connected with a power output shaft of the motor positioned outside the furnace body through a connecting shaft; and the heating insulation assembly is mounted around the crucible and supported by a bracket fixed on the furnace body. The invention further provides an application of the high-temperature atmosphere revolving furnace in preparation of AION (Anterior Ischemic Optic Neuropathy) powder. When the high-temperature atmosphere revolving furnace is used for preparing the AION powder, the reaction temperature is decreased; the reaction time is shortened; and the production cost is saved.

Description

technical field [0001] The invention belongs to the field of high-temperature atmosphere furnaces, in particular to a high-temperature atmosphere rotary furnace and its application in the preparation of A1ON powder. Background technique [0002] Existing equipment for preparing powders such as aluminum oxynitride and aluminum nitride is usually a vertical high-temperature atmosphere carbon tube furnace, including a furnace cavity, an insulation layer in the furnace cavity, and a heating element. The crucible is placed vertically in the center of the heating element. In the area. During powder preparation, the gas enters through the inlet pipe at the lower end of the furnace body and is discharged through the outlet pipe at the upper end. Since the crucible is placed vertically and the crucible is stationary during the reaction, the powder reaction material on the surface of the crucible is in contact with the atmosphere. Good, the internal powder reaction material is not in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/00
Inventor 卢铁城王颖谢修敏齐建起王跃忠
Owner SICHUAN UNIV
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