Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Foamed ceramic material with Si3N4-coated SiO2 core-shell structure and preparation method of foamed ceramic material
The invention relates to the technical field of foamed ceramic materials, in particular to a foamed ceramic material with a Si3N4-coated SiO2 core-shell structure and a preparation method of the foamed ceramic material. The microstructure of the Si3N4-coated SiO2 core-shell structure foamed ceramic material is of a honeycomb structure, pore walls are composed of Si3N4 and SiO2, the inner sides of the pore walls are Si3N4 layers, the outer sides of the pore walls are SiO2 layers, and the SiO2 layers between the adjacent pore walls are mutually sintered into a whole. The Si3N4 foamed ceramic material prepared by the method provided by the invention can simultaneously have the following performance indexes: the porosity is 88%-90%, the compressive strength is 7.5 MPa, the room-temperature thermal conductivity is 0.0808 W.m <-1 >. K <-1 >, the dielectric constant is less than 1.32, the dielectric loss is less than 0.009, the use temperature in an oxidizing atmosphere can reach 1100 DEG C, and the service life of the Si3N4 foamed ceramic material is prolonged. The urgent requirements of the aerospace and other fields on the high-temperature-resistant/heat-insulating/wave-transparent integrated material can be met.
本发明涉及泡沫陶瓷材料技术领域，更具体而言，涉及Si3N4@SiO2核壳结构泡沫陶瓷材料及制备方法。所述Si3N4@SiO2核壳结构泡沫陶瓷材料微观形貌为蜂窝结构，孔壁由Si3N4和SiO2构成，孔壁内侧为Si3N4层，外侧为SiO2层，相邻孔壁之间的SiO2互相烧结为一体。本发明提供的方法制备的Si3N4泡沫陶瓷材料可同时具备如下性能指标：孔隙率88％～90％、抗压缩强度7.5MPa、室温热导率0.0808W·m‑1·K‑1、介电常数小于1.32、介电损耗小于0.009，在氧化性气氛中使用温度可达1100℃，可满足航空航天等领域对耐高温/隔热/透波一体化材料的迫切需求。
Foamed ceramic material with Si3N4-coated SiO2 core-shell structure and preparation method of foamed ceramic material
The invention relates to the technical field of foamed ceramic materials, in particular to a foamed ceramic material with a Si3N4-coated SiO2 core-shell structure and a preparation method of the foamed ceramic material. The microstructure of the Si3N4-coated SiO2 core-shell structure foamed ceramic material is of a honeycomb structure, pore walls are composed of Si3N4 and SiO2, the inner sides of the pore walls are Si3N4 layers, the outer sides of the pore walls are SiO2 layers, and the SiO2 layers between the adjacent pore walls are mutually sintered into a whole. The Si3N4 foamed ceramic material prepared by the method provided by the invention can simultaneously have the following performance indexes: the porosity is 88%-90%, the compressive strength is 7.5 MPa, the room-temperature thermal conductivity is 0.0808 W.m <-1 >. K <-1 >, the dielectric constant is less than 1.32, the dielectric loss is less than 0.009, the use temperature in an oxidizing atmosphere can reach 1100 DEG C, and the service life of the Si3N4 foamed ceramic material is prolonged. The urgent requirements of the aerospace and other fields on the high-temperature-resistant/heat-insulating/wave-transparent integrated material can be met.
本发明涉及泡沫陶瓷材料技术领域，更具体而言，涉及Si3N4@SiO2核壳结构泡沫陶瓷材料及制备方法。所述Si3N4@SiO2核壳结构泡沫陶瓷材料微观形貌为蜂窝结构，孔壁由Si3N4和SiO2构成，孔壁内侧为Si3N4层，外侧为SiO2层，相邻孔壁之间的SiO2互相烧结为一体。本发明提供的方法制备的Si3N4泡沫陶瓷材料可同时具备如下性能指标：孔隙率88％～90％、抗压缩强度7.5MPa、室温热导率0.0808W·m‑1·K‑1、介电常数小于1.32、介电损耗小于0.009，在氧化性气氛中使用温度可达1100℃，可满足航空航天等领域对耐高温/隔热/透波一体化材料的迫切需求。
Foamed ceramic material with Si3N4-coated SiO2 core-shell structure and preparation method of foamed ceramic material
Si3N4@SiO2核壳结构泡沫陶瓷材料及制备方法
TONG ZONGWEI (Autor:in) / WANG YUEXIANG (Autor:in) / YAN XIANGJIE (Autor:in) / LI KEXUN (Autor:in) / MA WEIHAI (Autor:in)
22.12.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
Method for preparing Si3N4/BAS foamed ceramic material
| Europäisches Patentamt | 2015
| Europäisches Patentamt | 2020
Preparation method of foamed ceramic material, and foamed ceramic material and applications thereof
| Europäisches Patentamt | 2020
Preparation method of foamed ceramic and foamed ceramic
| Europäisches Patentamt | 2020
Preparation method of foamed ceramic productand foamed ceramic product
| Europäisches Patentamt | 2020