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Novel quaternary high-entropy metal diboride with low thermal conductivity and preparation method thereof
The invention relates to a novel quaternary high-entropy metal diboride and a preparation method thereof, and belongs to the technical field of ultrahigh-temperature ceramic materials. The chemical formula of the high-entropy metal diboride is recorded as (Hf < 0.25 > Zr < 0.25 > Ta < 0.25 > Sc < 0.25 >) B2, metal elements of Hf, Zr, Ta and Sc are in equal molar ratios, and the sum of the molar ratios is 1; according to the present invention, the thermal conductivity of the (Hf < 0.25 > Zr < 0.25 > Ta < 0.25 > Sc < 0.25 >) B2 is only 13.9 W * m <-1 > * K <-1 >, and is reduced by 86.7% and 76.8% compared with the thermal conductivity of the traditional Hf < B2 > and the traditional Zr < B2 >, and the thermal conductivity of the (Hf < 0.25 > Zr < 0.25 > Ta < 0.25 > Sc < 0.25 >) B2 is only 13.9 W * m <-1 > * K <-1 >; therefore, the (Hf < 0.25 > Zr < 0.25 > Ta0 < 0.25 > Sc < 0.25 >) B2 is suitable for popularization and application in the field of ultrahigh-temperature heat insulation.
本发明涉及一种新型四元高熵金属二硼化物及其制备方法，属于超高温陶瓷材料技术领域。所述高熵金属二硼化物化学式记为(Hf0.25Zr0.25Ta0.25Sc0.25)B2，其中Hf，Zr，Ta和Sc金属元素为等摩尔比，摩尔比总和为1；(Hf0.25Zr0.25Ta0.25Sc0.25)B2处理具有优异的相稳定性，优异的力学性能外，(Hf0.25Zr0.25Ta0.25Sc0.25)B2的热导率仅有13.9W·m‑1·K‑1，比传统HfB2，ZrB2降低了86.7％，76.8％。因此，(Hf0.25Zr0.25Ta0.25Sc0.25)B2适宜在超高温隔热领域推广应用。
Novel quaternary high-entropy metal diboride with low thermal conductivity and preparation method thereof
The invention relates to a novel quaternary high-entropy metal diboride and a preparation method thereof, and belongs to the technical field of ultrahigh-temperature ceramic materials. The chemical formula of the high-entropy metal diboride is recorded as (Hf < 0.25 > Zr < 0.25 > Ta < 0.25 > Sc < 0.25 >) B2, metal elements of Hf, Zr, Ta and Sc are in equal molar ratios, and the sum of the molar ratios is 1; according to the present invention, the thermal conductivity of the (Hf < 0.25 > Zr < 0.25 > Ta < 0.25 > Sc < 0.25 >) B2 is only 13.9 W * m <-1 > * K <-1 >, and is reduced by 86.7% and 76.8% compared with the thermal conductivity of the traditional Hf < B2 > and the traditional Zr < B2 >, and the thermal conductivity of the (Hf < 0.25 > Zr < 0.25 > Ta < 0.25 > Sc < 0.25 >) B2 is only 13.9 W * m <-1 > * K <-1 >; therefore, the (Hf < 0.25 > Zr < 0.25 > Ta0 < 0.25 > Sc < 0.25 >) B2 is suitable for popularization and application in the field of ultrahigh-temperature heat insulation.
本发明涉及一种新型四元高熵金属二硼化物及其制备方法，属于超高温陶瓷材料技术领域。所述高熵金属二硼化物化学式记为(Hf0.25Zr0.25Ta0.25Sc0.25)B2，其中Hf，Zr，Ta和Sc金属元素为等摩尔比，摩尔比总和为1；(Hf0.25Zr0.25Ta0.25Sc0.25)B2处理具有优异的相稳定性，优异的力学性能外，(Hf0.25Zr0.25Ta0.25Sc0.25)B2的热导率仅有13.9W·m‑1·K‑1，比传统HfB2，ZrB2降低了86.7％，76.8％。因此，(Hf0.25Zr0.25Ta0.25Sc0.25)B2适宜在超高温隔热领域推广应用。
Novel quaternary high-entropy metal diboride with low thermal conductivity and preparation method thereof
一种低热导新型四元高熵金属二硼化物及其制备方法
ZHU SHIZHEN (author) / LIU YANBO (author) / LIU LING (author) / MA ZHUANG (author) / ZHANG ZE (author)
2022-11-08
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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