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High-entropy ceramic as well as preparation method and application thereof
The invention belongs to the technical field of ceramic materials, and discloses high-entropy ceramic as well as a preparation method and application thereof. The molecular formula of the high-entropy ceramic is (Me1aMe2bMe3cMe4dMe5eMe6fMe7gMe8h)B2, 0.1</=a</=0.9, 0.1</=b</=0.9, 0.1</=c</=0.9, 0.1</=d</=0.9, 0.1</=e</=0.9, 0.1</=f</= 0.9, 0</=g</=0.9, 0</=h</=0.9, and a+b+c+d+e+f+g+h=1; Me1-Me8 are any 6-8 of Hf, Mo, Zr, Nb, Ti, V, W, Cr and Ta; the high-entropy ceramic is prepared by the following steps of adding any 6-8 of metal oxides HfO2, MoO3, ZrO2, Nb2O5, TiO2, V2O5, WO3, Cr2O3 and Ta2O5, B4C and carbon powder into a solvent, carrying out ball milling and mixing to obtain mixed powder, carrying out compression molding to obtain a blank, heating the blank to 1400-1600 DEG C, heating the obtained high-entropy powder to 1000-1400 DEG C by adopting spark plasma sintering, filling a protective atmosphere, then heating to 1900-2100 DEG C, pressurizing to 10-100 MPa, and calcining to obtain the high-entropy ceramic. The relative density of the high-entropy ceramic is greater than 98%, the hardness is 35-40 GPa, and the thermal conductivity is 0.1-1 W/(mK).
本发明属于陶瓷材料技术领域，公开了一种高熵陶瓷及其制备方法和应用。该高熵陶瓷分子式为(Me1aMe2bMe3cMe4dMe5eMe6fMe7gMe8h)B2，其中0.1≤a≤0.9，0.1≤b≤0.9，0.1≤c≤0.9，0.1≤d≤0.9，0.1≤e≤0.9，0.1≤f≤0.9，0≤g≤0.9，0≤h≤0.9且a+b+c+d+e+f+g+h＝1；Me1‑Me8为Hf、Mo、Zr、Nb、Ti、V、W、Cr、Ta中的任意6～8种；该高熵陶瓷是将金属氧化物HfO2、MoO3、ZrO2、Nb2O5、TiO2、V2O5、WO3、Cr2O3、Ta2O5中的任意6～8种和B4C、碳粉加入溶剂经球磨混合得到混合粉体，经压模后所得坯体升温至1400～1600℃，采用放电等离子烧结将所得高熵粉体升温至1000～1400℃时充入保护气氛，然后升温至1900～2100℃，加压10～100MPa煅烧制得。高熵陶瓷的相对密度＞98％，硬度为35～40GPa，热导率为0.1～1W/(mK)。
High-entropy ceramic as well as preparation method and application thereof
The invention belongs to the technical field of ceramic materials, and discloses high-entropy ceramic as well as a preparation method and application thereof. The molecular formula of the high-entropy ceramic is (Me1aMe2bMe3cMe4dMe5eMe6fMe7gMe8h)B2, 0.1</=a</=0.9, 0.1</=b</=0.9, 0.1</=c</=0.9, 0.1</=d</=0.9, 0.1</=e</=0.9, 0.1</=f</= 0.9, 0</=g</=0.9, 0</=h</=0.9, and a+b+c+d+e+f+g+h=1; Me1-Me8 are any 6-8 of Hf, Mo, Zr, Nb, Ti, V, W, Cr and Ta; the high-entropy ceramic is prepared by the following steps of adding any 6-8 of metal oxides HfO2, MoO3, ZrO2, Nb2O5, TiO2, V2O5, WO3, Cr2O3 and Ta2O5, B4C and carbon powder into a solvent, carrying out ball milling and mixing to obtain mixed powder, carrying out compression molding to obtain a blank, heating the blank to 1400-1600 DEG C, heating the obtained high-entropy powder to 1000-1400 DEG C by adopting spark plasma sintering, filling a protective atmosphere, then heating to 1900-2100 DEG C, pressurizing to 10-100 MPa, and calcining to obtain the high-entropy ceramic. The relative density of the high-entropy ceramic is greater than 98%, the hardness is 35-40 GPa, and the thermal conductivity is 0.1-1 W/(mK).
本发明属于陶瓷材料技术领域，公开了一种高熵陶瓷及其制备方法和应用。该高熵陶瓷分子式为(Me1aMe2bMe3cMe4dMe5eMe6fMe7gMe8h)B2，其中0.1≤a≤0.9，0.1≤b≤0.9，0.1≤c≤0.9，0.1≤d≤0.9，0.1≤e≤0.9，0.1≤f≤0.9，0≤g≤0.9，0≤h≤0.9且a+b+c+d+e+f+g+h＝1；Me1‑Me8为Hf、Mo、Zr、Nb、Ti、V、W、Cr、Ta中的任意6～8种；该高熵陶瓷是将金属氧化物HfO2、MoO3、ZrO2、Nb2O5、TiO2、V2O5、WO3、Cr2O3、Ta2O5中的任意6～8种和B4C、碳粉加入溶剂经球磨混合得到混合粉体，经压模后所得坯体升温至1400～1600℃，采用放电等离子烧结将所得高熵粉体升温至1000～1400℃时充入保护气氛，然后升温至1900～2100℃，加压10～100MPa煅烧制得。高熵陶瓷的相对密度＞98％，硬度为35～40GPa，热导率为0.1～1W/(mK)。
High-entropy ceramic as well as preparation method and application thereof
一种高熵陶瓷及其制备方法和应用
GUO WEIMING (author) / XU LIANG (author) / ZHANG YAN (author) / ZHANG WEI (author) / LIN HUATAI (author)
2021-05-25
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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