为响应国家所提出的节能环保政策,针对墙地砖干坯强度差等问题,在保证干坯强度的前提下,选取合适的增强剂和粘土种类制备建筑墙地砖。研究可塑性原料的种类和含量、成型压力以及分散剂等因素对墙地砖生坯干燥强度的影响。利用SEM和力学...为响应国家所提出的节能环保政策,针对墙地砖干坯强度差等问题,在保证干坯强度的前提下,选取合适的增强剂和粘土种类制备建筑墙地砖。研究可塑性原料的种类和含量、成型压力以及分散剂等因素对墙地砖生坯干燥强度的影响。利用SEM和力学性能测试等手段对材料的显微结构和力学性能进行了表征与分析。实验结果表明:当CMC为0.1%,球土B含量为16%时,所制备的浆料粘度为1111 m Pa·s,具有良好的流动性,且成型后(成型压力为30 MPa)的生坯强度高达2.3 MPa,能够满足后续机械加工的要求。展开更多
BeO gelcast green bodies were dried by liquid drying method with liquid desiccant ethanol.Effects of ethanol concentration,solids loading and aspect ratio of green body on the moisture and shrinkage of green bodies we...BeO gelcast green bodies were dried by liquid drying method with liquid desiccant ethanol.Effects of ethanol concentration,solids loading and aspect ratio of green body on the moisture and shrinkage of green bodies were studied through measuring mass and dimension.Additionally,liquid drying stress was analyzed and a model of the initial stage drying stress was established.The results show that higher ethanol concentration,lower solids loading and higher aspect ratio of gelcast green bodies increase the drying rate.Increasing the ethanol concentration decreases the shrinkage rate.Liquid drying stress is generated due to a non-uniform drying rate.During the process of liquid drying,the inner drying stress of the green body changes from compressive stress to tensile stress,while the outer drying stress changes from tensile stress to compressive stress.展开更多
文摘为响应国家所提出的节能环保政策,针对墙地砖干坯强度差等问题,在保证干坯强度的前提下,选取合适的增强剂和粘土种类制备建筑墙地砖。研究可塑性原料的种类和含量、成型压力以及分散剂等因素对墙地砖生坯干燥强度的影响。利用SEM和力学性能测试等手段对材料的显微结构和力学性能进行了表征与分析。实验结果表明:当CMC为0.1%,球土B含量为16%时,所制备的浆料粘度为1111 m Pa·s,具有良好的流动性,且成型后(成型压力为30 MPa)的生坯强度高达2.3 MPa,能够满足后续机械加工的要求。
基金Project(51202296)supported by the National Natural Science Foundation of ChinaProject(20120162120006)supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China
文摘BeO gelcast green bodies were dried by liquid drying method with liquid desiccant ethanol.Effects of ethanol concentration,solids loading and aspect ratio of green body on the moisture and shrinkage of green bodies were studied through measuring mass and dimension.Additionally,liquid drying stress was analyzed and a model of the initial stage drying stress was established.The results show that higher ethanol concentration,lower solids loading and higher aspect ratio of gelcast green bodies increase the drying rate.Increasing the ethanol concentration decreases the shrinkage rate.Liquid drying stress is generated due to a non-uniform drying rate.During the process of liquid drying,the inner drying stress of the green body changes from compressive stress to tensile stress,while the outer drying stress changes from tensile stress to compressive stress.
