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Preparation method of aluminum oxide ceramic guide rail

An alumina ceramic and alumina technology, which is applied in the field of ceramic guide rail preparation, can solve the problems of low machining accuracy, performance degradation of ceramic guide rails, wear, etc., and achieve the effects of improving grinding processing efficiency, reducing molding difficulty and uniform density of blanks

Active Publication Date: 2021-06-25
SHANDONG GUIYUAN ADVANCED CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manufacture of precision worktables and precision guide rails in my country is mostly based on metal materials. Metal materials are often affected by temperature during use and cannot meet the requirements for precision control of structural parts. The components move relatively at high speed for a long time, and there are problems of wear and corrosion.
At present, metal materials can no longer meet the needs of ultra-precision machining and ultra-precision measuring equipment for the use of guide rail components
[0003] Large-size, high-precision high-tech ceramic guide rails, especially double-hole or porous ceramic guide rails with a length ≥ 1.5 meters, most of the cross-sections are required to be square, and the body size Larger, thicker, unreasonable molding process will directly lead to serious problems such as body cracking and deformation of the green body due to uneven pressure during the molding process. Most porous ceramic guide rails use green body bonding or ceramic bonding. can be obtained, but this will lead to the decline of the overall performance of the ceramic guide rail, low processing accuracy, and cracking of the bonded body during the reciprocating motion of the guide rail, etc.

Method used

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  • Preparation method of aluminum oxide ceramic guide rail
  • Preparation method of aluminum oxide ceramic guide rail
  • Preparation method of aluminum oxide ceramic guide rail

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of alumina ceramic guide rail, comprising the following steps:

[0040] (1) Ball milling: First, 99.5Kg of alumina and 0.5Kg of raw materials are loaded into the ball mill, and then 50kg of water, 2Kg of ammonium polyacrylate and 0.3Kg of polyvinyl alcohol are added to perform ball milling to obtain the desired slurry.

[0041] (2) granulation: the slurry obtained in step (1) is spray-dried to obtain granulated powder, which is set aside for use; granulation is carried out in a spray granulation tower, the inlet air temperature is set to 500°C, and the outlet air temperature is set to 300°C; the particle size of the granulated powder obtained after spray granulation is 120 μm.

[0042] (3) Forming: take the granulated powder for ups and downs in step (2) and put it into a mold, and the mold kit used includes a rubber mold (rubber sleeve 13 and two upper and lower solid rubber stoppers 14), a polymer material with holes Positioning plate, 2 cylindri...

Embodiment 2

[0055] A method for preparing an alumina ceramic guide rail, comprising the following steps:

[0056] (1) Ball milling: first put 99.5Kg of alumina and 0.5Kg of raw materials into a ball mill, then add 50kg of water, 2Kg of ammonium polyacrylate and 0.3Kg of polyvinyl alcohol for ball milling to obtain the required slurry.

[0057] (2) Granulation: The slurry obtained in step (1) is spray-dried to obtain granulated powder for use; the granulation is carried out in a spray granulation tower, the inlet air temperature is set to 500°C, and the air outlet temperature is set to 300°C; the particle size of the granulated powder obtained after spray granulation is 120 μm.

[0058] (3) Molding: get the granulated powder stand-by ups and downs in the step (2) and pack into the mould, and the mold kit used comprises rubber mould (rubber sleeve 13 and two solid rubber stoppers 14 up and down), the band hole of macromolecular material Positioning plate, 3 cylindrical stainless steel mand...

Embodiment 3

[0066] A method for preparing an alumina ceramic guide rail, comprising the following steps:

[0067] 1) Ball milling: first put 99.5Kg of alumina and 0.5Kg of raw materials into a ball mill, then add 50kg of water, 2Kg of ammonium polyacrylate and 0.3Kg of polyvinyl alcohol for ball milling to obtain the required slurry.

[0068] (2) Granulation: The slurry obtained in step (1) is spray-dried to obtain granulated powder for use; the granulation is carried out in a spray granulation tower, the inlet air temperature is set to 500°C, and the air outlet temperature is set to 300°C; the particle size of the granulated powder obtained after spray granulation is 120 μm.

[0069] (3) Molding: get the granulated powder stand-by ups and downs in the step (2) and pack into the mould, and the mold kit used comprises rubber mould (rubber sleeve 13 and two solid rubber stoppers 14 up and down), the band hole of macromolecular material Positioning plate, 4 cylindrical stainless steel mandr...

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Abstract

The invention relates to a preparation method of an aluminum oxide ceramic guide rail and belongs to the technical field of ceramic guide rail preparation. The preparation method comprises the following steps of: (1) mixing aluminum oxide and a sintering aid, mixing the mixture, water, a dispersing agent and a binder, and carrying out ball milling to obtain required slurry; (2) spray-drying the slurry to obtain granulation powder for later use; (3) performing a cold isostatic pressing process on the granulation powder to obtain a biscuit; (4) performing inner hole cutting on the biscuit by using fretsaw equipment to obtain a square hole ceramic guide rail biscuit; (5) sintering the green body to obtain a blank, milling the blank, and carrying out sintering to obtain a crude product; and (6) carrying out accurate grinding and polishing on the crude product to obtain the aluminum oxide ceramic guide rail. The preparation method is scientific and reasonable in design, and the prepared ceramic guide rail has the advantages of low volume density, high hardness, large elastic modulus, low thermal expansion coefficient, high hardness and high wear resistance.

Description

technical field [0001] The invention relates to a preparation method of an alumina ceramic guide rail, belonging to the technical field of ceramic guide rail preparation. Background technique [0002] At present, ceramic guide rails are the key moving structural components of ultra-precision machining and ultra-precision measuring equipment (such as ultra-precision mobile workbenches for lithography machines for semiconductor chip processing, ultra-precision machine tools for high-precision optical devices, ultra-precision three-coordinate measuring instruments, etc.). , The development of large-scale, high-precision high-tech ceramic guide rails is one of the key core technologies for manufacturing ultra-precision equipment. Most of the manufacturing of precision workbenches and precision guides in my country are based on metal materials. Metal materials are often affected by temperature during use, which cannot meet the requirements of precision control of structural parts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622
CPCC04B35/10C04B35/622C04B2235/5436C04B2235/602C04B2235/612C04B2235/656C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607
Inventor 古娜于洋郑凯徐海森杨东亮
Owner SHANDONG GUIYUAN ADVANCED CERAMICS
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