融盐自发浸渗用微米级多孔陶瓷预制体的烧制

Preparation of Micron Porous Ceramic Preforms for Molten Salt Infiltrating Spontaneously

探索以SiO2为骨料,选择合适的助剂、烧成制度、成型压力和颗粒粒度,烧制成三维连通网格状多孔陶瓷预制体的工艺制度,用于自发浸渗熔融无机盐相变材料以制备无机盐／陶瓷基复合相变储能材料。讨论了制备工艺与预制体的显气孔率、孔结构以及显微组成之间的关系,烧制出的石英质多孔陶瓷具有40%-45%的显气孔率和5- 40μm的孔径大小,完全符合自发熔融浸渗工艺的要求。

In this paper, the technology using quartz powder as starting materials and starch as foaming agents for preparing porous ceramic preforms is studied. The relationships between pore configuration, porosity, microsturcture and various technologic parameters are discussed. This kind of porous ceramic preforms has 40% ～ 45% porosity, 5～ 40μm pore diameter. It can be used for molten salt infiltrating spontaneously to prepare salt/ceramic composite energy storage materials.