Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
ZrN-lanthanum silicate composite ceramic and hot pressing reaction sintering preparation method thereof
The invention provides ZrN-lanthanum silicate composite ceramic and a preparation method thereof. A main phase comprises ZrN and La4.67Si3O13, the grain size of ZrN is 20-60 [mu]m, and ZrN grains are dispersed in La4.67Si3O13. The volume density is 90%-95%, the hardness is 6.5-9.5 GPa, the bending strength is 180-205 MPa, and the fracture toughness is 1.6-2.8 MPa.m<1/2>. The preparation method comprises the following steps: taking alpha-Si3N4, La2Zr2O7 and Zr powder in a molar ratio of (1-4):3:2, adding an auxiliary agent, and sequentially carrying out ball milling, drying and grinding treatment; and carrying out compression molding, and carrying out hot-pressing sintering treatment. Zr is introduced into a Si3N4-La2Zr2O7 binary raw material system, so that the influence of gas on the performance of the ZrN-based composite ceramic is avoided, and the ceramic with excellent performance is obtained through a raw material ratio and a reasonable hot-pressing reaction sintering schedule.
本申请提供一种ZrN‑镧硅酸盐复相陶瓷及制备方法，主相包括ZrN、La4.67Si3O13，ZrN晶粒尺寸20‑60μm，ZrN晶粒分散在La4.67Si3O13中；其体积密度90％‑95％，硬度6.5‑9.5GPa，抗弯强度180‑205MPa，断裂韧性1.6‑2.8MPa.m1/2；制备方法包括：取摩尔比为(1‑4):3:2的α‑Si3N4、La2Zr2O7、Zr粉，加助剂后，依次球磨、烘干、研磨处理；而后压制成型，再热压烧结处理。通过在Si3N4‑La2Zr2O7二元原料系统引入Zr，避免气体对ZrN基复相陶瓷性能的影响，通过原料配比及合理的热压反应烧结制度获得了性能优异的陶瓷。
ZrN-lanthanum silicate composite ceramic and hot pressing reaction sintering preparation method thereof
The invention provides ZrN-lanthanum silicate composite ceramic and a preparation method thereof. A main phase comprises ZrN and La4.67Si3O13, the grain size of ZrN is 20-60 [mu]m, and ZrN grains are dispersed in La4.67Si3O13. The volume density is 90%-95%, the hardness is 6.5-9.5 GPa, the bending strength is 180-205 MPa, and the fracture toughness is 1.6-2.8 MPa.m<1/2>. The preparation method comprises the following steps: taking alpha-Si3N4, La2Zr2O7 and Zr powder in a molar ratio of (1-4):3:2, adding an auxiliary agent, and sequentially carrying out ball milling, drying and grinding treatment; and carrying out compression molding, and carrying out hot-pressing sintering treatment. Zr is introduced into a Si3N4-La2Zr2O7 binary raw material system, so that the influence of gas on the performance of the ZrN-based composite ceramic is avoided, and the ceramic with excellent performance is obtained through a raw material ratio and a reasonable hot-pressing reaction sintering schedule.
本申请提供一种ZrN‑镧硅酸盐复相陶瓷及制备方法，主相包括ZrN、La4.67Si3O13，ZrN晶粒尺寸20‑60μm，ZrN晶粒分散在La4.67Si3O13中；其体积密度90％‑95％，硬度6.5‑9.5GPa，抗弯强度180‑205MPa，断裂韧性1.6‑2.8MPa.m1/2；制备方法包括：取摩尔比为(1‑4):3:2的α‑Si3N4、La2Zr2O7、Zr粉，加助剂后，依次球磨、烘干、研磨处理；而后压制成型，再热压烧结处理。通过在Si3N4‑La2Zr2O7二元原料系统引入Zr，避免气体对ZrN基复相陶瓷性能的影响，通过原料配比及合理的热压反应烧结制度获得了性能优异的陶瓷。
ZrN-lanthanum silicate composite ceramic and hot pressing reaction sintering preparation method thereof
一种ZrN-镧硅酸盐复相陶瓷及其热压反应烧结制备方法
LU YOUJUN (Autor:in) / LIU YANG (Autor:in) / LI YANRUI (Autor:in) / YUAN ZHENXIA (Autor:in) / LIU XIANG (Autor:in)
28.05.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
ZrN-based composite ceramic and hot pressing reaction sintering preparation method thereof
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