This study describes the fabrication of macroporous ceramic supports for membranes prepared from quartz sand and dolomite mixtures, which are abundant local raw materials; tubular supports are made using the extrusion technique. The structure was analyzed by X-ray diffraction (XRD) and mercury porosimetry techniques; the presence of possible defects in the prepared porous ceramic materials was investigated with scanning electron microscopy (SEM). Possible phase formation and structural evolutions were evaluated by thermo-gravimetric analysis (TGA) and differential thermal analysis (DTA). The influence of dolomite addition and sintering temperature on phase composition, microstructure, porosity, pore size distribution, and chemical and mechanical properties is investigated. Supports properties such as permeability and three-point flexural strength were also measured and found to be related to both processing and microstructure parameters. The obtained supports show an optimum open porosity within a range of 40–45%, good permeability, and good resistance to corrosion. Such materials could be of great interest in the supports fabrication for membrane applications like water filtration.

中文翻译：

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基于天然石英砂和白云石的管状大孔陶瓷膜载体的制备与性能

这项研究描述了由石英砂和白云石混合物制成的膜的大孔陶瓷载体的制备，这些混合物是当地的丰富原材料；管状支撑件是使用挤压技术制成的。通过X射线衍射（XRD）和水银孔隙率法分析结构；用扫描电子显微镜（SEM）研究了制备的多孔陶瓷材料中可能存在的缺陷。通过热重分析（TGA）和差热分析（​​DTA）评估可能的相形成和结构演变。研究了白云石添加和烧结温度对相组成，微观结构，孔隙率，孔径分布以及化学和机械性能的影响。还测量了支撑性能，例如渗透性和三点抗弯强度，发现与加工和微观结构参数均相关。所获得的载体在40-45％的范围内显示出最佳的开孔率，良好的渗透性和良好的耐腐蚀性。这样的材料在用于膜应用如水过滤的载体制造中可能是非常令人感兴趣的。