Preparation method of gel casting titanium carbide ceramic biscuit

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...

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 drying process; and due to the low strength of the formed green body, the green body will The body is easily damaged, especially for large-sized, complex-shaped forming bodies, sometimes even cannot be demolded