Method for curing non water-based ceramic suspensoid by inducing dispersing agent to neutralize at low temperature and ceramic forming method

A molding method and low-temperature induced technology, applied in ceramic molding machines, manufacturing tools, etc., can solve the problems of using non-aqueous ceramic suspensions without dispersants, and achieve the effects of high mechanical properties, good dispersion, and easy industrial production.

Inactive Publication Date: 2017-06-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there is no report on the use of dispersants for curing high solid content, low viscosity non-aqueous ceramic suspensions

Method used

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  • Method for curing non water-based ceramic suspensoid by inducing dispersing agent to neutralize at low temperature and ceramic forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Alumina ceramic suspension was prepared and solidified with n-octane as solvent and oleic acid as dispersant.

[0035] 220 grams of alumina powder, 3.3 grams of oleic acid and 31.5 grams of n-octane were mixed and ball milled for 36 hours to prepare a ceramic suspension with a solid phase volume fraction of 55%. The suspension was injected into a non-porous glass mold, treated at a low temperature of -15°C for 48 hours, then demolded, dried in a vacuum environment for 20 minutes, and sintered at 1550°C for 2 hours to obtain a ceramic sintered body.

Embodiment 2

[0037] Using ethanol as solvent and nonanoic acid as dispersant to prepare and solidify zirconia ceramic suspension.

[0038] 290 grams of zirconia powder, 1.5 grams of nonanoic acid and 39.45 grams of ethanol were mixed and ball milled for 24 hours to prepare a ceramic suspension with a solid phase volume fraction of 50%. The suspension was injected into a non-porous metal mold, treated at a low temperature of -20°C for 24 hours, then demolded, dried in a vacuum environment for 10 minutes, and sintered at 1500°C for 3 hours to obtain a ceramic sintered body.

Embodiment 3

[0040] Using n-heptane as solvent and nonanoic acid as dispersant to prepare and cure silica ceramic suspension.

[0041] Mix 132.5 grams of silicon oxide powder, 3.2 grams of nonanoic acid and 34 grams of n-heptane, and ball mill for 12 hours to prepare a ceramic suspension with a solid phase volume fraction of 50%. The suspension was injected into a non-porous plastic mold, treated at a low temperature of -20°C for 24 hours, then demolded, dried in a vacuum environment for 15 minutes, and sintered at 1270°C for 3 hours to obtain a ceramic sintered body.

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Abstract

The invention discloses a method for curing non water-based ceramic suspensoid by inducing a dispersing agent to neutralize at low temperature and a ceramic forming method, belonging to the technical field of inorganic nonmetal ceramic suspensoid curing. According to the method for curing the non water-based ceramic suspensoid by inducing the dispersing agent to neutralize at the low temperature, which is disclosed by the invention, an organic acid dispersing agent is separated out from a solvent to neutralize at low temperature so as to cure the ceramic suspensoid, thereby realizing in situ solidification of the ceramic suspensoid. By the method for curing the non water-based ceramic suspensoid by inducing the dispersing agent to neutralize at the low temperature, which is provided by the invention, the dispersing agent is neutralized at the low temperature to realize the in situ solidification of the ceramic suspensoid; compared with traditional ceramic colloidal forming, a curing agent does not need to be added; the operation steps are simple and convenient; and the prepared green bodies are uniform and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of solidification of inorganic non-metallic ceramic suspensions, in particular to a method for curing non-water-based ceramic suspensions by inducing dispersant failure at low temperature. Background technique [0002] In the traditional ceramic preparation process, the working process of making ceramic blanks into green bodies with certain shapes and specifications is called ceramic molding. Ceramic colloidal molding can prepare ceramic parts with near net size and complex shape, and is widely used in the preparation process of industrial ceramics. The solvent used to prepare ceramic suspensions in the traditional ceramic colloidal molding process is generally water, and organic solvents are rarely used, but the preparation of water-based ceramic suspensions is not suitable for all ceramic systems. For example, aluminum nitride ceramics will be hydrolyzed rapidly in water, so non-polar organic substances n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/18C04B35/14C04B35/622B28B1/14
CPCB28B1/14C04B35/10C04B35/14C04B35/18C04B35/622
Inventor 杨金龙干科李世纪张在娟闫姝陈雨谷张笑妍鲁豫钜
Owner TSINGHUA UNIV
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