Preparation method of gel casting titanium carbide ceramic biscuit

A technology for gel injection molding and ceramic green body, which is applied to the preparation field of gel injection molding titanium carbide ceramic green body, can solve the problems of easy damage of the green body, deformation of the green body, low strength, etc., and can improve the solid content , high forming precision, good uniformity effect

Inactive Publication Date: 2018-07-27
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The green body prepared by the traditional colloidal molding process usually shrinks greatly during the drying process, which causes problems such as deformation and cracking of the green body during the dry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Titanium carbide powder pretreatment: In the ball mill, add titanium carbide: 940g, tungsten carbide: 35g, tetraisopropylbis(dioctylphosphiteoxy) titanate: 35g, and turn on the ball mill Grinding for 6 hours, drying to obtain pretreated titanium carbide powder;

[0023] (2) Gel solution preparation: In the reactor, add deionized water: 850 mL, Carbomer 941: 22g, n-pentanol: 146 mL, ammonia water: 8.8 mL, stir and dissolve to obtain a gel solution;

[0024] (3) Titanium carbide ceramic slurry preparation: In a ball mill, add separately, pre-treat titanium carbide powder: 500 mL, gel solution: 460 mL, ammonium hexafluorozirconate: 40 g, grind for 16 hours, ultrasonic defoaming treatment , to obtain titanium carbide ceramic slurry;

[0025] (4) Preparation of titanium carbide biscuit: inject titanium carbide ceramic slurry into the mold, heat slowly until the temperature reaches 55±2°C for 13 h, cool naturally, dry, and demould to obtain titanium carbide biscuit.

Embodiment 2

[0027] (1) Titanium carbide powder pretreatment: In the ball mill, add titanium carbide: 930g, tungsten carbide: 20g, tetraisopropylbis(dioctylphosphiteoxy) titanate: 50g, and turn on the ball mill Grinding for 7 hours and drying to obtain pretreated titanium carbide powder;

[0028] (2) Gel solution preparation: In the reactor, add deionized water: 820 mL, carbomer 941: 30 g, n-pentanol: 170 mL, ammonia water: 11 mL, stir and dissolve to obtain a gel solution;

[0029] (3) Titanium carbide ceramic slurry preparation: In a ball mill, add separately, pre-treat titanium carbide powder: 480 mL, gel solution: 470 mL, ammonium hexafluorozirconate: 50 g, grind for 17 hours, ultrasonic defoaming treatment , to obtain titanium carbide ceramic slurry;

[0030] (4) Preparation of titanium carbide biscuit: inject titanium carbide ceramic slurry into the mold, heat slowly to 55±2°C for 14 h, cool naturally, dry, and demould to obtain titanium carbide biscuit.

Embodiment 3

[0032] (1) Titanium carbide powder pretreatment: In the ball mill, add titanium carbide: 960g, tungsten carbide: 10g, tetraisopropylbis(dioctylphosphiteoxy) titanate: 30g, and turn on the ball mill Grinding for 5 hours and drying to obtain pretreated titanium carbide powder;

[0033] (2) Gel solution preparation: In the reactor, add deionized water: 830 mL, Carbomer 941: 15g, n-pentanol: 180 mL, ammonia water: 5.5 mL, stir and dissolve to obtain a gel solution;

[0034] (3) Titanium carbide ceramic slurry preparation: In a ball mill, add separately, pre-treat titanium carbide powder: 530 mL, gel solution: 450 mL, ammonium hexafluorozirconate: 20 g, grind for 15 hours, ultrasonic defoaming treatment , to obtain titanium carbide ceramic slurry;

[0035] (4) Preparation of titanium carbide biscuit: inject titanium carbide ceramic slurry into the mold, heat slowly to 55±2°C for 12 h, cool naturally, dry, and demould to obtain titanium carbide biscuit.

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PUM

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Abstract

The invention discloses a preparation method of a gel casting titanium carbide ceramic biscuit. The preparation method is characterized by comprising the following steps: pre-treating titanium carbidepowder by adopting tetraisopropyldi(dioctylphosphate)titanate to obtain pre-treated titanium carbide powder; preparing a gel solution by adopting 0.5 percent to 3 percent of carbomer 941, 10 percentto 15 percent of n-amyl alcohol and 0.2 to 1.5 percent of ammonia water; then adding the following components into a ball grinding mill in percentage by volume: 48 percent to 53 percent of the pre-treated titanium carbide powder, 43 percent to 48 percent of the gel solution and 2 percent to 5 percent of ammonium hexafluozirconate, wherein the sum of all the components is 100 percent; grinding for15 to 18h and carrying out ultrasonic de-foaming treatment to obtain titanium carbide ceramic slurry; then injecting the titanium carbide ceramic slurry into a mold; slowly heating until the temperature is 55+/-2 DEG C and keeping the heat for 12 to 15h; after naturally cooling, drying and de-molding to obtain the titanium carbide biscuit. The titanium carbide biscuit prepared by the method has the characteristics of high solid content, low organic matter content and environment friendliness; the sintered titanium carbide biscuit has high density.

Description

technical field [0001] The invention belongs to the field of molding and preparation of ceramic materials, and in particular relates to a method for preparing a titanium carbide ceramic biscuit by gel injection molding. The density of the prepared titanium carbide ceramic products. Background technique [0002] Titanium carbide ceramics, TiC is an iron-gray crystal with metallic luster, which belongs to the NaCl type simple cubic structure, the lattice constant is 0.4329 nm, and the space group is Fm3m. The carbon atom and the titanium atom are equivalent in the lattice position, and the TiC atom With a strong covalent bond between titanium carbide is a typical transition metal carbide. Its bond type is a mixture of ionic bonds, covalent bonds and metal bonds in the same crystal structure. The crystal structure determines that titanium carbide has high hardness, which is second only to diamond. The chemical system is a stable ceramic variety, with high melting point and the...

Claims

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Application Information

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IPC IPC(8): C04B35/56C04B35/626C04B35/63C04B35/632
CPCC04B35/5611C04B35/6261C04B35/6303C04B35/632C04B2235/3847C04B2235/6023
Inventor 李慧芝李冬梅何成贵
Owner UNIV OF JINAN
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