Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Alumina porous ceramic with hierarchical pore structure and preparation method thereof
The preparation method comprises the following steps: mixing rho-Al2O3 powder, a sintering aid, a catalyst, a pore-forming agent and a solvent according to a mass part ratio of (7-9): (1-3), the mass of the pore-forming agent is 10-30wt% of the mass of the rho-Al2O3 powder, the mass part ratio of the sintering aid to the catalyst is (7-9): (1-3), the mass part ratio of the sintering aid to the pore-forming agent to the solvent is (7-9): (1-3), and the mass part ratio of the sintering aid to the pore-forming agent to the solvent is (7-9): (1-3). The mass of the sintering aid is 1-3 wt% of the mass of the rho-Al2O3 powder, and the mass sum of crystal water contained in the solvent and the catalyst is the same as the mass sum of the rho-Al2O3 powder and the catalyst; injecting the ceramic slurry into a mold, curing, drying, demolding and drying to obtain a green body, and sintering at 1000-1300 DEG C for 1-2 hours to obtain the aluminum oxide porous ceramic with the hierarchical pore structure. According to the invention, a frame constructed by alumina wafers is taken as a matrix, and silica-based hollow glass beads are taken as a pore-forming agent and are uniformly distributed in the alumina matrix, so that the alumina porous ceramic with a hierarchical pore structure is formed, and the alumina porous ceramic has good high temperature resistance, excellent mechanical properties and relatively high porosity.
本发明公开了一种具有多级孔结构的氧化铝多孔陶瓷及其制备方法，包括：将ρ‑Al2O3粉体、烧结助剂、催化剂、造孔剂和溶剂混合，搅拌至均匀，得到陶瓷浆料，其中，按质量份数计，ρ‑Al2O3粉体和催化剂的比为(7～9):(1～3)，造孔剂的质量为ρ‑Al2O3粉体的质量的10～30wt％，烧结助剂的质量为ρ‑Al2O3粉体的质量的1～3wt％，溶剂和催化剂所含结晶水的质量和与ρ‑Al2O3粉体和催化剂的质量和相同；将陶瓷浆料注入模具中固化，干燥，脱模，烘干，得到坯体，于1000～1300℃烧结1～2h，得到具有多级孔结构的氧化铝多孔陶瓷。本发明以氧化铝晶片构建的框架作为基体，二氧化硅基空心玻璃微珠作为造孔剂均匀分布在氧化铝基体中，形成具有多级孔结构的氧化铝多孔陶瓷，其具有良好的耐高温性能、优异的力学性能和较高的孔隙率。
Alumina porous ceramic with hierarchical pore structure and preparation method thereof
The preparation method comprises the following steps: mixing rho-Al2O3 powder, a sintering aid, a catalyst, a pore-forming agent and a solvent according to a mass part ratio of (7-9): (1-3), the mass of the pore-forming agent is 10-30wt% of the mass of the rho-Al2O3 powder, the mass part ratio of the sintering aid to the catalyst is (7-9): (1-3), the mass part ratio of the sintering aid to the pore-forming agent to the solvent is (7-9): (1-3), and the mass part ratio of the sintering aid to the pore-forming agent to the solvent is (7-9): (1-3). The mass of the sintering aid is 1-3 wt% of the mass of the rho-Al2O3 powder, and the mass sum of crystal water contained in the solvent and the catalyst is the same as the mass sum of the rho-Al2O3 powder and the catalyst; injecting the ceramic slurry into a mold, curing, drying, demolding and drying to obtain a green body, and sintering at 1000-1300 DEG C for 1-2 hours to obtain the aluminum oxide porous ceramic with the hierarchical pore structure. According to the invention, a frame constructed by alumina wafers is taken as a matrix, and silica-based hollow glass beads are taken as a pore-forming agent and are uniformly distributed in the alumina matrix, so that the alumina porous ceramic with a hierarchical pore structure is formed, and the alumina porous ceramic has good high temperature resistance, excellent mechanical properties and relatively high porosity.
本发明公开了一种具有多级孔结构的氧化铝多孔陶瓷及其制备方法，包括：将ρ‑Al2O3粉体、烧结助剂、催化剂、造孔剂和溶剂混合，搅拌至均匀，得到陶瓷浆料，其中，按质量份数计，ρ‑Al2O3粉体和催化剂的比为(7～9):(1～3)，造孔剂的质量为ρ‑Al2O3粉体的质量的10～30wt％，烧结助剂的质量为ρ‑Al2O3粉体的质量的1～3wt％，溶剂和催化剂所含结晶水的质量和与ρ‑Al2O3粉体和催化剂的质量和相同；将陶瓷浆料注入模具中固化，干燥，脱模，烘干，得到坯体，于1000～1300℃烧结1～2h，得到具有多级孔结构的氧化铝多孔陶瓷。本发明以氧化铝晶片构建的框架作为基体，二氧化硅基空心玻璃微珠作为造孔剂均匀分布在氧化铝基体中，形成具有多级孔结构的氧化铝多孔陶瓷，其具有良好的耐高温性能、优异的力学性能和较高的孔隙率。
Alumina porous ceramic with hierarchical pore structure and preparation method thereof
具有多级孔结构的氧化铝多孔陶瓷及其制备方法
LIU SHAN (Autor:in) / YANG ZONGJIE (Autor:in) / MAO ZHIYONG (Autor:in) / WANG DAJIAN (Autor:in)
02.01.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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