Porcelain powder was consolidated using spark plasma sintering (SPS) at a constant heating rate of 100°C min−1 to peak temperatures ranging from 1000 to 1200°C and was observed to sinter at relatively low temperature ∼920°C under the SPS conditions while conventional sintering requires ∼1050°C. SPS produced densification rates about 10 times greater than conventional sintering. The dwelling step at the optimal peak temperature was negligible due to rapid flow of the molten glass assisted by applied pressure. SPSed samples exhibited denser microstructures, resulting in improved physico-mechanical properties compared with conventionally sintered samples such as apparent bulk density improved from 2.38 to 2.48 g cm−3, Vickers hardness improved from 3–5 to 6–7 GPa, and fracture toughness improved from 2–3 to 4–6 MPa m1/2.
CartyWM, SenapatiU.Porcelain – raw materials, processing, phase evolution, and mechanical behaviour. J Am Ceram Soc. 1998;81(1):3–20. doi: 10.1111/j.1151-2916.1998.tb02290.x
2.
IqbalY, LeeWE.Microstructural evolution in triaxial porcelain. J Am Ceram Soc. 2000;83(12):3121–3127. doi: 10.1111/j.1151-2916.2000.tb01692.x
3.
KingeryWD, BowenHK, UhlmannDR.Introduction to ceramics. New York (NY): Wiley; 1976.
4.
NortonFH.Fine ceramics: technology and applications. 2nd ed. Florida (FL): Robert E. Krieger Publishing Company, Inc.; 1978.
5.
RahamanMN.Sintering of ceramics. Florida (FL): CRC Press; 2008.
6.
LerdpromW.Firing of porcelain [M.S. thesis]. Alfred (NY): New York State College of Ceramics at Alfred University; 2014.
7.
SrikrishnaK, ThomasG, MartinezR, Kaolinite-mullite reaction series: a TEM study. J Mater Sci. 1990;25(1):607–612. doi: 10.1007/BF00714083
8.
OkadaK, OtsukaN, OssakaJ.Characterization of spinel phase formed in the kaolin-mullite thermal sequence. J Am Ceram Soc. 1986;69(10):C-251–C-253. doi: 10.1111/j.1151-2916.1986.tb07353.x
9.
ChakravortyAK, GhoshDK.Kaolinite–mullite reaction series: the development and significance of a binary aluminosilicate phase. J Am Ceram Soc. 1991;74(6):1401–1406. doi: 10.1111/j.1151-2916.1991.tb04119.x
GrassoS, SakkaY, MaizzaG.Electric current activated/assisted sintering (ECAS): a review of patents 1906–2008. Sci Technol Advanced Mater. 2009;10(5): 053001 (22 p.). doi: 10.1088/1468-6996/10/5/053001
12.
TsukadaG, SueyoshiH, KamibayashiH, Bending strength of zirconia/porcelain functionally graded materials prepared using spark plasma sintering. J Dent. 2014;42(12):1569–1576. doi: 10.1016/j.jdent.2014.09.012
13.
EvansAG, CharlesEA.Fracture toughness determinations by indentation. J Am Ceram Soc. 1976;59(7–8):371–372. doi: 10.1111/j.1151-2916.1976.tb10991.x
14.
StevensonCM, GurnickM.Structural collapse in kaolinite, montmorillonite and illite clay and its role in the ceramic rehydroxylation dating of low-fired earthenware. J Arch Sci. 2016;69:54–63. doi: 10.1016/j.jas.2016.03.004
15.
SperinckS, RaiteriP, MarksN, Dehydroxylation of kaolinite to metakaolin – a molecular dynamics study. J Mater Chem. 2011;21(7):2118–2125. doi: 10.1039/C0JM01748E
16.
LeeH, CartyWM.Glass phase composition in porcelains and correlation with firing temperature. Proceedings of the 106th Annual Meeting and Exposition of the American Ceramic Society; 2004 April 18–21; Indianapolis, IN; 2004.
17.
CartyWM.Observations on the glass phase composition in porcelains. Mater Equip Whitewares: Ceram Eng Sci Proc. 2009;23(2):74–79.
18.
ColoradoV.Fast firing of porcelain [M.S. thesis]. Alfred (NY): New York State College of Ceramics at Alfred University; 2014.
19.
GrassoS, HuC, MaizzaG, Effects of pressure application method on transparency of spark plasma sintered alumina. J Am Ceram Soc. 2011;94(5):1405–1409. doi: 10.1111/j.1551-2916.2010.04274.x
20.
SousaFJ, Dal BóM, GuglielmiPO, Characterization of Young's modulus and fracture toughness of albite glass by different techniques. Ceram Int. 2014;40(7):10893–10899. doi: 10.1016/j.ceramint.2014.03.085
21.
KanzakiS, TabataH, KumazawaT, Sintering and mechanical properties of stoichiometric mullite. J Am Ceram Soc. 2006;68(1):C6–C7.
22.
BradtRC, HasselmanDPH, MunzD, , editors. Fracture mechanics of ceramics: fracture fundamentals, high-temperature deformation, damage, and design. New York: Springer Science & Business Media; 1992.
23.
AkonoAT, RandallNX, UlmFJ.Experimental determination of the fracture toughness via microscratch tests: application to polymers, ceramics, and metals. J Mater Res. 2012;27(02):485–493. doi: 10.1557/jmr.2011.402
24.
SprayJG.Frictional melting processes in planetary materials: from hypervelocity impact to earthquakes. Annu Rev Earth Planet Sci. 2010;38:221–254. doi: 10.1146/annurev.earth.031208.100045
25.
RuhR, MazdiyasniKS, MendirattaMG.Mechanical and microstructural characterization of mullite and mullite-SiC-Whisker and ZrO2-toughened-mullite-SiC-whisker composites. J Am Ceram Soc. 1988;71(6):503–512. doi: 10.1111/j.1151-2916.1988.tb05902.x
26.
KingeryW, WoulbrounJ, CharvatF.Effects of applied pressure on densification during sintering in the presence of a liquid phase. J Am Ceram Soc. 1963;46(8):391–395. doi: 10.1111/j.1151-2916.1963.tb11758.x
27.
WolfG, McMillanP.Pressure effects on silicate melt structure and properties. Rev Mineral Geochem. 1995;32(1):505–561.
