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http://dx.doi.org/10.6111/JKCGCT.2021.31.4.182

Thermal properties of silica fume-SiO2 based porous ceramic fabricated by using foaming method  

Ha, Taewan (Department of Advanced Materials Science and Engineering, Kyonggi University)
Kang, Seunggu (Department of Advanced Materials Science and Engineering, Kyonggi University)
Kim, Kangduk (Department of Advanced Materials Science and Engineering, Kyonggi University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.31, no.4, 2021 , pp. 182-189 More about this Journal
Abstract
Porous ceramics were manufactured using the foaming method for the development of inorganic insulating materials. Silica fume and SiO2 were used as main raw materials, and bentonite was used as a rapid setting agent for uniform structure formation of porous ceramics. The porous ceramics were sintered at 1200℃, and porosity, density, compressive strength, microstructure and thermal conductivity were analyzed. As the content of silica fume to SiO2 of the porous ceramics increased 70 to 90 %, the specific gravity increased from 0.63 to 0.69, and the compressive strength increased from 9.41 Mpa to 12.86 Mpa. But, the porosity showed a tendency to decrease from 72.07 % to 70.82 %, contrary to the specific gravity. As a result of measuring the thermal conductivity, the porous ceramic with a silica fume content of 70 % showed a thermal conductivity of 0.75 to 0.72 W/m·K at 25 to 800℃, respectively, and, another that a silica fume content of 90 % showed a 0.66~0.86 W/m·K. So the lower the silica f ume content, the lower the thermal conductivity, which was conf irmed to be consistent with porosity result. As a result of microstructure analysis using SEM (Scanning Electron Microscope), pores in the range of tens to hundreds ㎛ were observed inside and outside the porous ceramic, and it was confirmed that the pore distribution was relatively uniform.
Keywords
Porous ceramic; Compressive strength; Porosity; Thermal conductivity; Direct forming methods;
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1 W. Yan, N. Li, Y. Li, G. Liu, B. Han and J. Xu, "Effect of particle size on microstructure and strength of porous spinel ceramics prepared by pore-forming in situ technique", Bull. Mater. Sci. 34 (2011) 1109.   DOI
2 R. Duval and E.H. Kadri, "Influence of silica fume on the workability and the compressive strength of high-performance concretes", Cem. Concr. Res. 28 (1998) 533.   DOI
3 D.H. Olson, J.T. Gaskins, J.A. Tomko, E.J. Opila, R.A. Golden, G.J.K. Harrington, A.L. Chamberlain and P.E. Hopkins, "Local thermal conductivity measurements to determine the fraction of α-cristoblaite in thermally grown oxides for aerospace applications", Scr. Mater. 177 (2020) 214.   DOI
4 Z. Zivcova, E. Gregorova, W. Pabst, D.S. Smith, A. Michot and C. Poulier, "Thermal conductivity of porous alumina ceramics prepared using starch as a pore-forming agent", J. Eur. Ceram. Soc. 29 (2009) 347.   DOI
5 Y.P. Moon and J.Y. Choi, "Enhancement of the life of refractories through the operational experience of plasma torch melter", J. Nucl. Fuel Cycle Waste Technol. 14 (2016) 1277.
6 A. Watanabe, H. Takahashi and F. Nakatani, "Mechansim of dense magnesia layer formation near the surface of magnesia-carbon brick", J. Am. Ceram. Soc. 69 (1986) 213.
7 M. Hamidouche, N. Bouaouadja, C. Olagnon and G. Fantozzi, "Thermal shock behavior of mullite ceramic", Ceram. Int. 29 (2003) 599.   DOI
8 K. Andreev, V. Tadaion, Q. Zhu, W. Wang, Y. Yin and T. Tonnesen, "Thermal and mechanical cyclic tests and fracture mechanics parameters as indicators of thermal shock resistance - case study on silica refractories", J. Eur. Ceram. Soc. 39 (2019) 1650.   DOI
9 E. Gregorova, W. Pabst, P. Diblikova and V. Necina, "Temperature dependence of dampling in silica refractories measured via the impulse excitation technique", Ceram. Int. 44 (2018) 8363.   DOI
10 H. Lu, Y. Lei, L. Jia-zhan and Y. Jing-kun, "Effect of Al2O3 powder on properties of fumed silica thermal insulating composites using mechanofusion technique", Appl. Mech. Mater. 148-149 (2012) 1011.   DOI
11 C. Sadik, I.E. El-Amrani and A. Albizane, "Recent advances in silica-alumina refractory: A review", J. Asian Ceram. Soc. 2 (2014) 83.   DOI
12 A. Pokherl, D.N. Seo, S.T. Lee and I.J. Kim, "Processing of porous ceramics by direct foaming : a review", J. Korean Ceram. Soc. 50 (2013) 93.   DOI
13 C.N. Djangang, E. Kamseu, M.K. Ndikontar, G.L. Lecomte-Nana, J. Soro, U.C. Melo, A. Elimbi, P. Blanchart and D. Njopwouo, "Sintering behaviour of porous ceramic kaolin-corundum composites: phase evolution and densification", Mater. Sci. Eng. A. Struct. Mater. 528 (2011) 8311.   DOI
14 T. Shimizu, K. Matsuura, H. Furue and K. Matsuzak, "Thermal conductivity of high porosity alumina refractory bricks made by a slurry gelation and foaming method", J. Eur. Ceram. Soc. 33 (2013) 3429.   DOI
15 D.J. Green, "Fabrication and mechanical properties of lightweight ceramics produced by sintering of hollow spheres", J. Am. Ceram. Soc. 68 (1985) 403.   DOI
16 S.U. Pickering, "Pickering: emulsions", J. Chem. Soc. 91 (2001) 2001.   DOI
17 K. Andreev, V. Tadaion, J. Koster and E. Verstrynge, "Cyclic fatigue of silica refractories - effect of test method on failure process", J. Eur. Ceram. Soc. 37 (2017) 1811.   DOI
18 H. Schneider, J. Schreuer and B. Hildmann, "Structure and properties of mullite - a review", J. Eur. Ceram. Soc. 28 (2008) 329.   DOI
19 R.W. Powell, "Thermal conductivity of selected materials", R.W. Powell, C.Y. Ho and P.E. Liley, Ed, Vol. 8, (U. S. Dept. of Commerce, Washington, 1966) p. 99.
20 Y. Dai, Y. Yin, X. Xu, S. Jin, Y. Li and H. Harmuth, "Effect of the phase transformation on fracture behavior of fused silica refractories", J. Eur. Ceram. Soc. 38 (2018) 5601.   DOI
21 P. Sepulveda, "Gelcasting foams for porous ceramics", J. Am. Ceram. Soc. 76 (1997) 61.
22 H.M. Khater, "Effect of silica fume on the characterization of the geopolymer materials", Int. J. Adv. Struct. 5 (2013) 12.   DOI
23 S. Bhanja and B. Sengupta, "Influence of silica fume on the tensile strength of concrete", Cem. Concr. Res. 35 (2005) 743.   DOI
24 R.C. Lewis, "Properties of fresh and hardened concrete containing supplementary cementitious materials", N.D. Belie, M. Soutsos and E. Gruyaert, Ed, Vol. 3 (Springer, New York, 2018) p. 99.
25 W. Ramsden, "Separation of solids in the surface-layers of solutions and 'suspensions' (observations on surfacemembranes, bubbles, emulsions, and mechanical coagulation). - Preliminary account", Proc. R. Soc. Lond. 72 (1904) 477.
26 F. Sanchez and C. Ince, "Microstructure and macroscopic properties of hybrid carbon nanofiber/silica fume cement composites", Compos. Sci. Technol. 69 (2009) 1310.   DOI