Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Porous alumina ceramic material, preparation method and application
The invention relates to the technical field of production of high-purity aluminum and aluminum alloys, in particular to a porous aluminum oxide ceramic material, a preparation method and application, the porous aluminum oxide ceramic material comprises a composite aggregate and an organic binder, and the mass ratio of the composite aggregate to the organic binder is 47: 3; the composite aggregate comprises 9 wt%-17 wt% of an inorganic binder and 83 wt%-91 wt% of aggregate particles; the inorganic binder is prepared from the following components in percentage by weight: 40wt% to 50wt% of B2O3, 20wt% to 29wt% of Al2O3, 10wt% to 15wt% of SiO2, 9.4 wt% to 14.4 wt% of MgO, 0 to 0.5 wt% of Na2O, 0 to 0.5 wt% of K2O and 0 to 10wt% of Re2O3, and Re is a rare earth element. According to the method, corundum or alpha-Al2O3 is taken as a framework, a rare earth composite oxide is taken as an inorganic binder, and sintering necks are formed among aggregate particles through high-temperature reaction, so that the porous alumina ceramic with pore bimodal distribution is obtained. Two pore diameters with different sizes are distributed in situ on the surfaces of the framework particles and the sintering neck, so that the filtering effect of double capture of molten aluminum inclusions is realized. The problems that the aperture of a filter is large, and small-grain-size impurities cannot be filtered at the same time are solved.
本发明涉及高纯铝及铝合金的生产技术领域，尤其涉及一种多孔氧化铝陶瓷材料、制备方法及应用，包括复合骨料和有机粘结剂，所述复合骨料与有机粘结剂的质量比为47:3；所述复合骨料包括9wt％～17wt％的无机质粘结剂和83wt％～91wt％的骨料颗粒；所述无机质粘结剂包括：40wt％～50wt％的B2O3、20wt％～29wt％的Al2O3、10wt％～15wt％的SiO2、9.4wt％～14.4wt％的MgO、0～0.5wt％的Na2O、0～0.5wt％的K2O和0～10wt％的Re2O3，Re为稀土元素。该方法以刚玉或者α‑Al2O3为骨架，以稀土复合氧化物为无机粘结剂，通过高温反应在骨料颗粒间形成烧结颈，获得气孔双峰分布的多孔氧化铝陶瓷。在骨架颗粒和烧结颈表面原位分布有两种不同尺寸的孔径，实现双重捕获铝液夹杂的过滤效果。解决过滤器孔径大，无法同时对小晶粒尺寸杂质进行过滤问题。
Porous alumina ceramic material, preparation method and application
The invention relates to the technical field of production of high-purity aluminum and aluminum alloys, in particular to a porous aluminum oxide ceramic material, a preparation method and application, the porous aluminum oxide ceramic material comprises a composite aggregate and an organic binder, and the mass ratio of the composite aggregate to the organic binder is 47: 3; the composite aggregate comprises 9 wt%-17 wt% of an inorganic binder and 83 wt%-91 wt% of aggregate particles; the inorganic binder is prepared from the following components in percentage by weight: 40wt% to 50wt% of B2O3, 20wt% to 29wt% of Al2O3, 10wt% to 15wt% of SiO2, 9.4 wt% to 14.4 wt% of MgO, 0 to 0.5 wt% of Na2O, 0 to 0.5 wt% of K2O and 0 to 10wt% of Re2O3, and Re is a rare earth element. According to the method, corundum or alpha-Al2O3 is taken as a framework, a rare earth composite oxide is taken as an inorganic binder, and sintering necks are formed among aggregate particles through high-temperature reaction, so that the porous alumina ceramic with pore bimodal distribution is obtained. Two pore diameters with different sizes are distributed in situ on the surfaces of the framework particles and the sintering neck, so that the filtering effect of double capture of molten aluminum inclusions is realized. The problems that the aperture of a filter is large, and small-grain-size impurities cannot be filtered at the same time are solved.
本发明涉及高纯铝及铝合金的生产技术领域，尤其涉及一种多孔氧化铝陶瓷材料、制备方法及应用，包括复合骨料和有机粘结剂，所述复合骨料与有机粘结剂的质量比为47:3；所述复合骨料包括9wt％～17wt％的无机质粘结剂和83wt％～91wt％的骨料颗粒；所述无机质粘结剂包括：40wt％～50wt％的B2O3、20wt％～29wt％的Al2O3、10wt％～15wt％的SiO2、9.4wt％～14.4wt％的MgO、0～0.5wt％的Na2O、0～0.5wt％的K2O和0～10wt％的Re2O3，Re为稀土元素。该方法以刚玉或者α‑Al2O3为骨架，以稀土复合氧化物为无机粘结剂，通过高温反应在骨料颗粒间形成烧结颈，获得气孔双峰分布的多孔氧化铝陶瓷。在骨架颗粒和烧结颈表面原位分布有两种不同尺寸的孔径，实现双重捕获铝液夹杂的过滤效果。解决过滤器孔径大，无法同时对小晶粒尺寸杂质进行过滤问题。
Porous alumina ceramic material, preparation method and application
一种多孔氧化铝陶瓷材料、制备方法及应用
WANG BO (Autor:in) / DING HAONAN (Autor:in) / LI CHUANYI (Autor:in) / HAO XU (Autor:in) / ZHOU XIAONAN (Autor:in) / SONG SUOCHENG (Autor:in) / SHI ZHONGQI (Autor:in) / YANG JIANFENG (Autor:in)
02.08.2024
Patent
Elektronische Ressource
Chinesisch
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