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Preparation method of ZrB2-SiC-LaB6 ternary ultra-high-temperature nano composite ceramic
The invention discloses a preparation method of ZrB2-SiC-LaB6 ternary ultra-high-temperature nano composite ceramic, which comprises the following steps: mixing and stirring five prepared solutions, namely a zirconium source solution, a boron source solution, a silicon source solution, a lanthanum source solution and a carbon source solution, hydrolyzing, carrying out polycondensation to obtain sol, and aging to obtain gel; drying and ball-milling the gel to obtain precursor powder; and finally, carrying out cold pressing and heat treatment on the precursor powder to obtain the ZrB2-SiC-LaB6 ternary composite ceramic. The ZrB2-SiC-LaB6 nano-composite ceramic is prepared by combining a sol-gel technology with an in-situ boron thermal/carbon thermal reaction technology, ZrB2, SiC and LaB6 form a nano-composite phase, a small amount of ZrO2 phase and LaBO3 are accompanied around the nano-composite phase, the phases are uniformly distributed and have good dispersity, meanwhile, no obvious intragranular closed pores exist, and the average grain size of crystal grains is about 300nm.
本发明公开了一种ZrB2‑SiC‑LaB6三元超高温纳米复合陶瓷的制备方法，先将配制的锆源溶液、硼源溶液、硅源溶液、镧源溶液和碳源溶液五种溶液混合搅拌，水解后缩聚成溶胶，陈化后得到凝胶；再将凝胶干燥、球磨，得到前驱体粉末；最后，前驱体粉末经冷压、热处理即得ZrB2‑SiC‑LaB6三元复合陶瓷。本发明通过溶胶凝胶技术结合原位硼热/碳热反应技术，制得ZrB2‑SiC‑LaB6纳米复合陶瓷，其中ZrB2、SiC、LaB6形成纳米复合相，少量的ZrO2相和LaBO3相伴生在纳米复合相周围，各相分布均匀，分散性好，同时无明显的晶内封闭孔隙，晶粒的平均粒径约300nm。
Preparation method of ZrB2-SiC-LaB6 ternary ultra-high-temperature nano composite ceramic
The invention discloses a preparation method of ZrB2-SiC-LaB6 ternary ultra-high-temperature nano composite ceramic, which comprises the following steps: mixing and stirring five prepared solutions, namely a zirconium source solution, a boron source solution, a silicon source solution, a lanthanum source solution and a carbon source solution, hydrolyzing, carrying out polycondensation to obtain sol, and aging to obtain gel; drying and ball-milling the gel to obtain precursor powder; and finally, carrying out cold pressing and heat treatment on the precursor powder to obtain the ZrB2-SiC-LaB6 ternary composite ceramic. The ZrB2-SiC-LaB6 nano-composite ceramic is prepared by combining a sol-gel technology with an in-situ boron thermal/carbon thermal reaction technology, ZrB2, SiC and LaB6 form a nano-composite phase, a small amount of ZrO2 phase and LaBO3 are accompanied around the nano-composite phase, the phases are uniformly distributed and have good dispersity, meanwhile, no obvious intragranular closed pores exist, and the average grain size of crystal grains is about 300nm.
本发明公开了一种ZrB2‑SiC‑LaB6三元超高温纳米复合陶瓷的制备方法，先将配制的锆源溶液、硼源溶液、硅源溶液、镧源溶液和碳源溶液五种溶液混合搅拌，水解后缩聚成溶胶，陈化后得到凝胶；再将凝胶干燥、球磨，得到前驱体粉末；最后，前驱体粉末经冷压、热处理即得ZrB2‑SiC‑LaB6三元复合陶瓷。本发明通过溶胶凝胶技术结合原位硼热/碳热反应技术，制得ZrB2‑SiC‑LaB6纳米复合陶瓷，其中ZrB2、SiC、LaB6形成纳米复合相，少量的ZrO2相和LaBO3相伴生在纳米复合相周围，各相分布均匀，分散性好，同时无明显的晶内封闭孔隙，晶粒的平均粒径约300nm。
Preparation method of ZrB2-SiC-LaB6 ternary ultra-high-temperature nano composite ceramic
一种ZrB2-SiC-LaB6三元超高温纳米复合陶瓷的制备方法
LI ZHI (Autor:in) / XIA DAWANG (Autor:in) / ZHOU ZHE (Autor:in) / LIAO HUANYI (Autor:in) / TAO CHUANGFANG (Autor:in) / CHEN BIN (Autor:in)
28.03.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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