无机材料学报Issue(8)：877-881,5.DOI:10.15541/jim20150049
海藻酸钠离子凝胶法制备直通孔氧化铝多孔陶瓷
Porous Alumina Ceramics with Unidirectional Oriented Pores Fabricated by Ionotropic Process of Sodium Alginate
摘要
Abstract
Alumina ceramic bodies with high porosity characterized by highly ordered and unidirectional oriented pores were successfully fabricated using the ionotropic process of sodium alginate by solvent exchange subsequently with freeze-drying. It is important to point out that the whole process and raw materials are eco-friendly. The average unidirectional pore size of samples sintered at 1500℃ for 2 h is 200μm with minor porosity in the pore walls with average pore size of 0.3-0.5μm. The properties of samples can be adjusted by controlling the solid loading in slurry. As the solid loading increasing from 5wt% to 15wt%, the density and compressive strength increased from 0.87 g/cm3 to 1.16 g/cm3 and from (18.9±3.2) MPa to (44.2±5.4) MPa, respectively with permeability de-creasing from 2.57×10-11m2 to 2.16×10-11m2. In addition, with the solid loading increasing from 5wt% to 15wt%, the conductivity of the direction parallel and perpendicular to the unidirectional pores increased from 2.1 W/(m·K) to 3.1 W/(m·K) and from 1.3 W/(m·K) to 1.7 W/(m·K), respectively.关键词
直通孔氧化铝多孔陶瓷/渗透率/热导率/离子凝胶Key words
unidirectionally oriented porous alumina ceramics/permeability/thermal conductivity/ionotropic分类
化学化工引用本文复制引用
孙阳,薛伟江,孙加林,周国治,黄勇..海藻酸钠离子凝胶法制备直通孔氧化铝多孔陶瓷[J].无机材料学报,2015,(8):877-881,5.基金项目
国家重点基础研究发展计划(973计划)(2006CB605207-2) National Key Basic Research and Developmet Plan (973Plan)(2006CB605207-2) （973计划）
