A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
一种具有类洋葱微结构的BN/SiBN/Si3N4/Si2N2O/Si3N4复合材料的制备方法
本发明公开了一种具有类洋葱微结构的BN/SiBN/Si3N4/Si2N2O/Si3N4复合材料的制备方法，包括以下步骤：首先通过高能球磨获得A粉末，其次通过溶胶‑凝胶过程在A粉末表面包覆SiO2，得到A@SiO2粉末，通过熔盐烧结、洗涤和除碳处理形成核壳结构的SiBN@Si2N2O，最后通过热压烧结得到具有洋葱微结构的BN/SiBN/Si3N4/Si2N2O/Si3N4复合材料；本发明制备的具有类洋葱微结构的BN/SiBN/Si3N4/Si2N2O/Si3N4复合材料，实现介电性能优良、强度高、耐高温抗烧蚀等一体多功能，满足超高音速导弹天线罩材料的应用要求，且制备方法简单，成本低，操作易行。
The invention discloses a preparation method of a BN/SiBN/Si3N4/Si2N2O/Si3N4 composite material with an onion-like microstructure, and the preparation method comprises the following steps: firstly, obtaining A powder through high-energy ball milling, secondly, coating the surface of the A powder with SiO2 through a sol-gel process to obtain A coated SiO2 powder, forming SiBN coated Si2N2O with a core-shell structure through molten salt sintering, washing and carbon removal treatment, and finally, preparing the BN coated Si2N2O/Si3N4 composite material with the onion-like microstructure. And finally, carrying out hot pressed sintering to obtain the BN/SiBN/Si3N4/Si2N2O/Si3N4 composite material with the onion microstructure. The BN/SiBN/Si3N4/Si2N2O/Si3N4 composite material with the onion-like microstructure prepared by the preparation method disclosed by the invention has the integrated multiple functions of excellent dielectric property, high strength, high temperature resistance, ablation resistance and the like, meets the application requirements of a hypersonic missile antenna housing material, and is simple in preparation method, low in cost and easy to operate.
一种具有类洋葱微结构的BN/SiBN/Si3N4/Si2N2O/Si3N4复合材料的制备方法
本发明公开了一种具有类洋葱微结构的BN/SiBN/Si3N4/Si2N2O/Si3N4复合材料的制备方法，包括以下步骤：首先通过高能球磨获得A粉末，其次通过溶胶‑凝胶过程在A粉末表面包覆SiO2，得到A@SiO2粉末，通过熔盐烧结、洗涤和除碳处理形成核壳结构的SiBN@Si2N2O，最后通过热压烧结得到具有洋葱微结构的BN/SiBN/Si3N4/Si2N2O/Si3N4复合材料；本发明制备的具有类洋葱微结构的BN/SiBN/Si3N4/Si2N2O/Si3N4复合材料，实现介电性能优良、强度高、耐高温抗烧蚀等一体多功能，满足超高音速导弹天线罩材料的应用要求，且制备方法简单，成本低，操作易行。
The invention discloses a preparation method of a BN/SiBN/Si3N4/Si2N2O/Si3N4 composite material with an onion-like microstructure, and the preparation method comprises the following steps: firstly, obtaining A powder through high-energy ball milling, secondly, coating the surface of the A powder with SiO2 through a sol-gel process to obtain A coated SiO2 powder, forming SiBN coated Si2N2O with a core-shell structure through molten salt sintering, washing and carbon removal treatment, and finally, preparing the BN coated Si2N2O/Si3N4 composite material with the onion-like microstructure. And finally, carrying out hot pressed sintering to obtain the BN/SiBN/Si3N4/Si2N2O/Si3N4 composite material with the onion microstructure. The BN/SiBN/Si3N4/Si2N2O/Si3N4 composite material with the onion-like microstructure prepared by the preparation method disclosed by the invention has the integrated multiple functions of excellent dielectric property, high strength, high temperature resistance, ablation resistance and the like, meets the application requirements of a hypersonic missile antenna housing material, and is simple in preparation method, low in cost and easy to operate.
Fabrication and characterization of porous unidirectional Si2N2O–Si3N4 composite
| British Library Online Contents | 2009
Fabrication and microstructure characterization of continuously porous Si2N2O–Si3N4 ceramics
| British Library Online Contents | 2007
| European Patent Office | 2022
| British Library Online Contents | 2007
| European Patent Office | 2024