High-purity ultrafine transition metal carbide single-phase high-entropy ceramic powder and preparation method thereof
A transition metal and ceramic powder technology, applied in the field of superhard ceramic materials, can solve the problems of high oxygen content and residual carbon content of multi-component carbides, poor sphericity, low purity, etc., to enrich the ceramic material system, inhibit the The effect of grain growth and oxygen reduction
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specific Embodiment approach 1
[0032] Specific embodiment one: present embodiment is that the chemical formula of high-purity ultrafine transition metal carbide single-phase high-entropy ceramic powder is (Hf x1 Nb x3 Ta x4 Ti x2 m x5 ) C; said M is Zr, V, Cr, Mo or W; said x1+x2+x3+x4+x5=1.
specific Embodiment approach 2
[0033] Specific embodiment two: this embodiment is a high-purity ultrafine transition metal carbide single-phase high-entropy ceramic powder is completed according to the following steps:
[0034] 1. Weighing:
[0035] ①. Weigh the metal oxide:
[0036] According to the molar ratio of hafnium oxide, niobium oxide, tantalum oxide, titanium oxide and M oxide is (1~4):(1~4):(1~4):(1~4):(1 ~4) Weighing hafnium oxide, niobium oxide, tantalum oxide, titanium oxide and M oxide respectively to obtain metal oxide;
[0037] ②. Calculate the total amount of reducing carbon powder:
[0038]According to the reaction equation is A x o y +(bx / a+y)C=x / aA a C b + yCO respectively calculate the amount of reducing carbon powder required for the carbonization reaction of hafnium oxide, niobium oxide, tantalum oxide, titanium oxide and M oxide taken in step ①, and then add up to obtain The total amount of reducing carbon powder;
[0039] A in the reaction equation described in step 1. x o...
specific Embodiment approach 3
[0045] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the hafnium oxide described in step one ① is HfO 2 . Other steps are the same as in the second embodiment.
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