Nano hafnium carbide ceramic organic precursor and preparation method thereof

Abstract

The invention relates to a preparation method of a nano hafnium carbide ceramic organic precursor. The method successively includes the steps of: 1. designing and adopting a device with protective atmosphere as the equipment for preparation of the hafnium carbide ceramic organic precursor; 2. in the protective atmosphere, adding 1 part of a hafnium source into 2-4 parts of acetylacetone, stirringthe obtained mixture at a rate of 300r / min-2500r / min for 0.5h-4h under room temperature, then adding 5-15 parts of alcohol, carrying out reaction at 40DEG C-100DEG C for 1h-4h, adding 1-4 parts of a carbon source, carrying out reaction at a reflux temperature for 2h-4h to obtain an orange transparent solution; and removing the solvent, then performing drying in a vacuum drying box at 80DEG C-150DEG C for 3h-5h to obtain a brown solid, i.e. a hafnium carbide precursor. The method provided by the invention has the characteristics of cheap and easily available raw materials, simple process, shortpreparation cycle, low cost, and good solubility of the prepared nano hafnium carbide ceramic organic precursor in an organic solvent.

Description

technical field [0001] The invention belongs to the field of hafnium carbide ceramic materials. In particular, it relates to a nanometer hafnium carbide ceramic organic precursor and a preparation method thereof. Background technique [0002] Hafnium carbide ceramics have excellent properties such as high melting point, high strength, chemical corrosion resistance, and good high temperature stability. They are used in many fields such as thin film materials, high temperature structural materials, superhard tool materials, microelectronic materials and nuclear energy storage materials It has broad application prospects and is also an ideal high-temperature protection material. After the C / C composite material is modified by hafnium carbide ceramics, its anti-oxidation and anti-ablation properties are significantly improved. [0003] The traditional preparation methods of hafnium carbide ceramics mainly include direct synthesis, carbothermal reduction, self-propagating high-t...

AI Technical Summary

Problems solved by technology

[0006] In summary, the existing methods for preparing hafnium carbide ceramic organic precursors have the following defects: the reaction process route is complicated, the preparation cycle is long; the raw materials are expensive and the cost is high; the precursor cracking product contains HfO 2 ; The prepared precursor has poor solubility in organic solvents, etc.

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