Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses a method for preparing porous ceramics of which the pore sizes are in gradient distribution from the surface to the interior by using potassium feldspar washing waste. The method comprises the following steps: mixing and milling the potash feldspar washing waste with silicon carbide, and drying and sieving the mixture to obtain a porous ceramic powder raw material; uniformly paving the porous ceramic powder raw material into a crucible with air permeability on the outer wall and at the bottom, compacting by vibration, performing high-temperature heating and heat preservation in a nitrogen atmosphere, and introducing a certain amount of air in the heat preservation process, so as to prepare the porous ceramic of which the pore size is gradually reduced from the surface to the inside. The method provided by the invention is simple in technological process, complex heating and cooling procedures and other special treatment means are not needed, and the porous ceramic of which the pore sizes are in gradient distribution from the surface to the interior can be prepared only by controlling the amount of introduced air.
本发明公开一种利用钾长石水洗废料制备从表面到内部气孔尺寸呈梯度分布的多孔陶瓷的方法，包括步骤：将钾长石水洗废料与碳化硅进行混合、磨细后，经干燥过筛处理，获得多孔陶瓷粉末原料；将所述多孔陶瓷粉末原料均匀平铺入外壁及底部具有透气性的坩埚中振实，在氮气气氛中进行高温加热并保温，在保温过程中通入一定量的空气，制得气孔尺寸从表面到内部呈现梯度减小的多孔陶瓷；本发明所述方法工艺过程简单，无需复杂的升降温程序及其他特殊处理手段，仅通过控制通入的空气量，即可制备出从表面到内部气孔尺寸呈梯度分布的多孔陶瓷。
The invention discloses a method for preparing porous ceramics of which the pore sizes are in gradient distribution from the surface to the interior by using potassium feldspar washing waste. The method comprises the following steps: mixing and milling the potash feldspar washing waste with silicon carbide, and drying and sieving the mixture to obtain a porous ceramic powder raw material; uniformly paving the porous ceramic powder raw material into a crucible with air permeability on the outer wall and at the bottom, compacting by vibration, performing high-temperature heating and heat preservation in a nitrogen atmosphere, and introducing a certain amount of air in the heat preservation process, so as to prepare the porous ceramic of which the pore size is gradually reduced from the surface to the inside. The method provided by the invention is simple in technological process, complex heating and cooling procedures and other special treatment means are not needed, and the porous ceramic of which the pore sizes are in gradient distribution from the surface to the interior can be prepared only by controlling the amount of introduced air.
本发明公开一种利用钾长石水洗废料制备从表面到内部气孔尺寸呈梯度分布的多孔陶瓷的方法，包括步骤：将钾长石水洗废料与碳化硅进行混合、磨细后，经干燥过筛处理，获得多孔陶瓷粉末原料；将所述多孔陶瓷粉末原料均匀平铺入外壁及底部具有透气性的坩埚中振实，在氮气气氛中进行高温加热并保温，在保温过程中通入一定量的空气，制得气孔尺寸从表面到内部呈现梯度减小的多孔陶瓷；本发明所述方法工艺过程简单，无需复杂的升降温程序及其他特殊处理手段，仅通过控制通入的空气量，即可制备出从表面到内部气孔尺寸呈梯度分布的多孔陶瓷。
Method for preparing environment-friendly brick from potassium feldspar tailings
| Europäisches Patentamt | 2020
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