Abstract
Porous Si3N4 ceramics were prepared by aqueous gelcasting using Si3N4 poly-hollow microspheres (PHMs) as pore-forming agent. The effects of solid loading of Si3N4 slurry and Si3N4 PHM content on the properties of porous Si3N4 ceramics were investigated. Only β-Si3N4 phase is observed in porous Si3N4 ceramics, and Si3N4 PHMs distribute uniformly both in Si3N4 green samples and porous Si3N4 ceramics. Results show that solid loading of Si3N4 slurry and Si3N4 PHM content could considerably influence the properties of porous Si3N4 ceramics. With the increase of solid loading of Si3N4 slurry (decrease of Si3N4 PHM content), the distributing state of Si3N4 PHMs changes from contacting with each other to just embedding in the matrix, thus their porosity decreases, while their shrinkage, flexural strength, and fracture toughness increase.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Kalemtas A, Topates G, Özcoban H, et al. Mechanical characterization of highly porous β-Si3N4 ceramics fabricated via partial sintering & starch addition. J Eur Ceram Soc 2013, 33: 1507–1515.
Díaz A, Hampshire S. Characterisation of porous silicon nitride materials produced with starch. J Eur Ceram Soc 2004, 24: 413–419.
Xia Y, Zeng Y-P, Jiang D. Microstructure and mechanical properties of porous Si3N4 ceramics prepared by freeze-casting. Mater Design 2012, 33: 98–103.
Fan L, Zhou M, Wang H, et al. Low-temperature preparation of β-Si3N4 porous ceramics with a small amount of Li2O–Y2O3. J Am Ceram Soc 2014, 97: 1371–1374.
Li X, Wu P, Zhu D. Effect of foaming pressure on the properties of porous Si3N4 ceramic fabricated by a technique combining foaming and pressureless sintering. Scripta Mater 2013, 68: 877–880.
Li X, Zhang L, Yin X. Microstructure and mechanical properties of three porous Si3N4 ceramics fabricated by different techniques. Mat Sci Eng A 2012, 549: 43–49.
Yu J, Yang J, Li S, et al. Preparation of Si3N4 foam ceramics with nest-like cell structure by particle-stabilized foams. J Am Ceram Soc 2012, 95: 1229–1233.
Yue J, Dong B, Wang H. Porous Si3N4 fabricated by phase separation method using benzoic acid as pore-forming agent. J Am Ceram Soc 2011, 94: 1989–1991.
Chen F, Shen Q, Yan F, et al. Pressureless sintering of β-Si3N4 porous ceramics using a H3PO4 pore-forming agent. J Am Ceram Soc 2007, 90: 2379–2383.
Inagaki Y, Shigegaki Y, Ando M, et al. Synthesis and evaluation of anisotropic porous silicon nitride. J Eur Ceram Soc 2004, 24: 197–200.
Yu J, Yang J, Li H, et al. Study on particle-stabilized Si3N4 ceramic foams. Mater Lett 2011, 65: 1801–1804.
Chen D, Zhang B, Zhuang H, et al. Combustion synthesis of network silicon nitride porous ceramics. Ceram Int 2003, 29: 363–364.
Shan S-Y, Yang J-F, Lu Y, et al. Effects of carbon source on microstructural evolution and sintering behavior of porous silicon nitride ceramics. Scripta Mater 2007, 56: 193–196.
Zou C, Zhang C, Li B, et al. Microstructure and properties of porous silicon nitride ceramics prepared by gel-casting and gas pressure sintering. Mater Design 2013, 44: 114–118.
Fukasawa T, Deng Z-Y, Ando M, et al. Synthesis of porous silicon nitride with unidirectionally aligned channels using freeze-drying process. J Am Ceram Soc 2002, 85: 2151–2155.
Li S, Wang C-A, Zhou J. Effect of starch addition on microstructure and properties of highly porous alumina ceramics. Ceram Int 2013, 39: 8833–8839.
Augustin C, Hungerbach W. Production of hollow spheres (HS) and hollow sphere structures (HSS). Mater Lett 2009, 63: 1109–1112.
Thijs I, Luyten J, Mullens S. Producing ceramic foams with hollow spheres. J Am Ceram Soc 2004, 87: 170–172.
Shao Y, Jia D, Liu B. Characterization of porous silicon nitride ceramics by pressureless sintering using fly ash cenosphere as pore-forming agent. J Eur Ceram Soc 2009, 29: 1529–1534.
Su Z, Xi X, Hu Y, et al. A new Al2O3 porous ceramic prepared by addition of hollow spheres. J Porous Mater 2014, 21: 601–609.
Qi F, Xu X, Xu J, et al. A novel way to prepare hollow sphere ceramics. J Am Ceram Soc 2014, 97: 3341–3347.
Yang J-L, Xu X-X, Wu J-M, et al. Preparation of Al2O3 poly-hollow microsphere (PHM) ceramics using Al2O3 PHMs coated with sintering additive via co-precipitation method. J Eur Ceram Soc 2015, 35: 2593–2598.
Author information
Authors and Affiliations
Corresponding author
Additional information
This article is published with open access at Springerlink.com
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
About this article
Cite this article
Wu, JM., Zhang, XY., Xu, J. et al. Preparation of porous Si3N4 ceramics via tailoring solid loading of Si3N4 slurry and Si3N4 poly-hollow microsphere content. J Adv Ceram 4, 260–266 (2015). https://doi.org/10.1007/s40145-015-0158-9
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s40145-015-0158-9