首页>
外国专利>
Titanium carbide powder, titanium carbide-ceramic composite powder and production method thereof, sintered body of titanium carbide powder, sintered body of titanium carbide-ceramic composite powder, and production method thereof
Titanium carbide powder, titanium carbide-ceramic composite powder and production method thereof, sintered body of titanium carbide powder, sintered body of titanium carbide-ceramic composite powder, and production method thereof
Disclosed is a highly-pure fine titanium carbide powder having a maximum particle size of 100 nm or less and containing metals except titanium in an amount of 0.05 wt % or less and free carbon in an amount of 0.5 wt % or less. The powder has a NaCl-type crystal structure, and a composition represented by TiCxOyNz, wherein X, Y and Z satisfy the relations: 0.5X1.0; 0Y0.3; 0Z0.2; and 0.5X+Y+Z1.0.) The powder is produced by: dissolving an organic substance serving as a carbon source in a solvent to prepare a liquid, wherein the organic substance contains at least one OH or COOH group which is a functional group coordinatable to titanium of titanium alkoxide, and no element except C, H, N and O; mixing titanium alkoxide with the liquid to satisfy the following relation: 0.71.0 (wherein is a molar ratio of the carbon source to the titanium alkoxide), so as to obtain a precursor solution; and subjecting a product in the precursor solution to a heat treatment in a non-oxidizing atmosphere or a vacuum atmosphere at a temperature of 1050 to 1500° C. The present invention can provide fine titanium carbide powders with nano-scale particle sizes, which are free of inorganic impurities, such as titanium oxide and metal, low in free carbon, and effective in enhancing characteristics of a titanium carbide-ceramics composite sintered body.
展开▼
机译：公开了一种高纯度细碳化钛粉末，其最大粒径为100nm或更小，并且含有除钛以外的金属，其含量为0.05wt％以下，并且含有游离碳，含量为0.5wt％以下。该粉末具有NaCl型晶体结构，并且由TiCxOyNz表示的组成，其中X，Y和Z满足以下关系：0.5X1.0;和0Y0.3; 0Z0.2;粉末通过以下方法制备：将用作碳源的有机物质溶解在溶剂中以制备液体，其中该有机物质包含至少一个作为官能团的OH或COOH基团;和0.5X + Y + Z1.0。与烷氧基钛的钛配位的基团，除C，H，N和O外没有其他元素;将所述烷氧基钛与所述液体混合以满足以下关系：0.71.0（其中碳源与所述烷氧基钛的摩尔比），以获得前体溶液;使前体溶液中的产物在非氧化性气氛或真空气氛中于1050至1500℃的温度下进行热处理。本发明可以提供具有纳米级粒度的细碳化钛粉末。不含氧化钛，金属等无机杂质，游离碳低，对提高碳化钛陶瓷复合烧结体的特性有效。
展开▼
