多孔电气石滤球的制备与性能研究

Preparation and properties of porous tourmaline filter balls

以电气石粉为主要原料,采用高温烧结法制备了粒径30 mm左右的轻质通孔电气石滤球.采用阿基米德称重法测试了滤球的气孔率和密度,通过微控电子万能实验机测试了滤球的抗压强度,采用热重分析、X射线衍射分析、扫描电镜等方法对滤球中电气石材料的化学结构、热稳定性及表观形貌进行表征.结果表明：掺杂量不大于50%,烧结温度在700~750℃范围内,电气石滤球的结构和性能稳定,密度在1.0~1.5 g/cm3之间,随烧结温度的升高滤球的气孔率增大,抗压强度增加.

Taking tourmaline flour as the main material,the light and porous tourmaline filtration balls with average grain size about 30 mm was obtained by using high-temperature sintering.The porosity and density of filter balls were measured by Archimedes weighting method.Compression strength was done by Micro control electronic universal testing machine.The chemical structure and thermal stability of tourmaline material,as well as its apparent morphology were characterized by thermogravimetric analysis（TGA）,X-ray diffraction and SEM.The results indicate that the porous tourmaline balls have stable structure and performance with doping amounts less than 50 %,and sintering temperature between 500~750 ℃.Porosity and compression strength of filter balls increase when the temperature of sintering rises with the density between 1.0~1.5 g/cm3.