Porous ceramics have been attracted attention extensively because of their excellent chemical and thermal stability, excellent permeability, high specific surface area, extremely low electrical and thermal conductivity, energy saving, heat resistance and corrosion resistance. In this paper, diatomite-based porous ceramics were prepared using diatomite as main raw material and calcite as pore-forming agent. The effect of calcite were studied by thermal analysis, XRD, SEM, and porosity. The calcite decomposed at 600–800 °C and CaSiO3 was synthesized in situ though the reaction of CaO from the calcite and SiO2 from the diatomite. At sintering temperature of 1050 °C, the porous ceramic with 20% calcite addition reserved sub-micrometer pore structure of raw material diatomite as well as a relative high porosity (about 60%), which showed potential application in filtration.
This is a preview of subscription content, log in to check access.
This work was financially supported by the National Natural Science Foundation of China (No. 51402028), Project of CDUT Innovation Team (Utilization of Rare Earth Resource and New Materials), and Sichuan Panxi Strategic Mineral Resource Innovation and Development Experimental Area 3rd Significant Science and Technology Project (No. CDWA2016ZC3-1).
E. Litovsky, M. Shapiro, A. Shavit, Gas pressure and temperature dependences of thermal conductivity of porous ceramic materials: part 2, refractories and ceramics with porosity exceeding 30%. J. Am. Ceram. Soc. 79, 1366–1376 (1996)CrossRefGoogle Scholar
H. Xinyou, M. Xu, W. Xuan, S. Qi, Current situation of preparation and application of porous ceramic materials. China Ceram. 51, 5–8 (2015)Google Scholar
M. Fukushima, Y. Yoshizawa, P. Colombo, Fabrication of highly porous silica thermal insulators prepared by gelation-freezing route. J. Am. Ceram. Soc. 97, 713–717 (2014)CrossRefGoogle Scholar
L. Ya-ru, L. Ru-tie, X. Xiang, Preparation and application of porous ceramics with micron and sub-micron pore size. J. Synth. Cryst. 45, 2300–2305 (2016)Google Scholar
E. Chevereau, N. Zouaoui, L. Limousy, P. Dutournié, S. Déon, P. Bourseau, Surface properties of ceramic ultrafiltration TiO2 membranes: effects of surface equilibriums on salt retention. Desalination 255, 1–8 (2010)CrossRefGoogle Scholar
C.C. Coterillo, T. Yokoo, T. Yoshioka, T. Tsuru, M. Asaeda, Synthesis and characterization of microporous ZrO2 membranes for gas permeation at 200 °C. Sep. Sci. Technol. 46, 1224–1230 (2011)CrossRefGoogle Scholar
A. Cheraitia, A. Ayral, A. Julbe, V. Rouessac, H. Satha, Synthesis and characterization of microporous silica-alumina membranes. J. Porous Mater. 17, 259–263 (2010)CrossRefGoogle Scholar
H. Qi, S. Niu, X. Jiang, N. Xu, Enhanced performance of a macroporous ceramic support for nanofiltration by using α-Al2O3 with narrow size distribution. Ceram. Int. 39, 2463–2471 (2013)CrossRefGoogle Scholar
T. Qian, J. Li, X. Min, Y. Deng, W. Guan, L. Ning, Diatomite: a promising natural candidate as carrier material for low, middle and high temperature phase change material. Energ. Convers. Manage. 98, 34–45 (2015)CrossRefGoogle Scholar
H. Liang, S. Zhou, Y. Chen, F. Zhou, C. Yan, Diatomite coated with Fe2O3 as an efficient heterogeneous catalyst for degradation of organic pollutant. J. Taiwan Inst. Chem. E. 49, 105–112 (2015)CrossRefGoogle Scholar