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A platform for research: civil engineering, architecture and urbanism
Ceramic radome material and preparation method thereof
The invention provides a ceramic radome material and a preparation method thereof, and belongs to the field of ceramic radomes. The preparation method comprises the following steps: firstly, dispersing 20-80 parts of silicon nitride powder, 40-90 parts of monatomic silicon powder, 0.2-0.5 part of a sintering aid, 1-3 parts of a binder and 0.01-0.05 part of a surfactant in a solvent to form turbid liquid with the solid content of 30-60wt%; and then carrying out mechanical stirring foaming, directional freezing, demolding, vacuum drying and nitriding heat treatment to obtain the ceramic antenna housing material. The apparent porosity of the ceramic radome material is 36.0-76.0%, the volume density of the ceramic radome material is 1.5-2.6 g/cm < 3 >, the compression strength of the ceramic radome material is 50-150 MPa, and the fracture toughness of the ceramic radome material is 4.6-6.9 MPa.m < 1/2 >. The prepared ceramic radome material has the characteristics of high open porosity, light weight, high fracture toughness and the like, the preparation process is simple and convenient, the weight of the radome material can be reduced, the mechanical property and the fracture toughness of the radome material can be improved, and the ceramic radome material has a good application prospect in the fields of hypersonic aircrafts and the like.
本发明提供一种陶瓷天线罩材料及其制备方法，属于陶瓷天线罩领域。本发明首先将20～80份氮化硅粉体、40～90份单质硅粉体、0.2～0.5份烧结助剂、1～3份粘结剂及0.01～0.05份表面活性剂分散在溶剂中，形成固含量为30～60wt％的悬浊液；随后通过机械搅拌发泡、定向冷冻、脱模、真空干燥、氮化热处理，得到陶瓷天线罩材料。本发明陶瓷天线罩材料的显气孔率为36.0～76.0％，体积密度为1.5～2.6g/cm3，耐压强度为50～150MPa，断裂韧性为4.6～6.9MPa·m1/2。本发明制备的陶瓷天线罩材料具有开口气孔率高、轻量、断裂韧性高等特点，制备工艺简便，可在降低天线罩材料重量的同时提升其力学性能和断裂韧性，在高超声速飞行器等领域具有良好的应用前景。
Ceramic radome material and preparation method thereof
The invention provides a ceramic radome material and a preparation method thereof, and belongs to the field of ceramic radomes. The preparation method comprises the following steps: firstly, dispersing 20-80 parts of silicon nitride powder, 40-90 parts of monatomic silicon powder, 0.2-0.5 part of a sintering aid, 1-3 parts of a binder and 0.01-0.05 part of a surfactant in a solvent to form turbid liquid with the solid content of 30-60wt%; and then carrying out mechanical stirring foaming, directional freezing, demolding, vacuum drying and nitriding heat treatment to obtain the ceramic antenna housing material. The apparent porosity of the ceramic radome material is 36.0-76.0%, the volume density of the ceramic radome material is 1.5-2.6 g/cm < 3 >, the compression strength of the ceramic radome material is 50-150 MPa, and the fracture toughness of the ceramic radome material is 4.6-6.9 MPa.m < 1/2 >. The prepared ceramic radome material has the characteristics of high open porosity, light weight, high fracture toughness and the like, the preparation process is simple and convenient, the weight of the radome material can be reduced, the mechanical property and the fracture toughness of the radome material can be improved, and the ceramic radome material has a good application prospect in the fields of hypersonic aircrafts and the like.
本发明提供一种陶瓷天线罩材料及其制备方法，属于陶瓷天线罩领域。本发明首先将20～80份氮化硅粉体、40～90份单质硅粉体、0.2～0.5份烧结助剂、1～3份粘结剂及0.01～0.05份表面活性剂分散在溶剂中，形成固含量为30～60wt％的悬浊液；随后通过机械搅拌发泡、定向冷冻、脱模、真空干燥、氮化热处理，得到陶瓷天线罩材料。本发明陶瓷天线罩材料的显气孔率为36.0～76.0％，体积密度为1.5～2.6g/cm3，耐压强度为50～150MPa，断裂韧性为4.6～6.9MPa·m1/2。本发明制备的陶瓷天线罩材料具有开口气孔率高、轻量、断裂韧性高等特点，制备工艺简便，可在降低天线罩材料重量的同时提升其力学性能和断裂韧性，在高超声速飞行器等领域具有良好的应用前景。
Ceramic radome material and preparation method thereof
一种陶瓷天线罩材料及其制备方法
REN BO (author) / LIU JINGJING (author) / WANG ENHUI (author) / HOU XINMEI (author)
2024-08-13
Patent
Electronic Resource
Chinese
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