Development of a Freeze-Drying Process for Wet Gelcast Bodies

Hai Hua Wu; Xuan Du; Qi Hua Tian

doi:10.4028/www.scientific.net/AMR.230-232.256

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 230-232Development of a Freeze-Drying Process for Wet...

Development of a Freeze-Drying Process for Wet Gelcast Bodies

Abstract:

Wet gelcast body contains the same amount of water as the starting slurry, which has to be eliminated by a subsequent drying step. But in an indirect solid freeform fabrication (ISFF) process, the wet gelcast body is surrounded by an integral sacrificial mold, and drying cracks may be formed due to mold constrains. In the paper, freeze-drying was first introduced to deal with the wet gelcast body for preventing the cracking by minimizing drying shrinkage. First, the contents of non-freezing, freezing bound and free water in polyacrylamide gel (PAG) were evaluated by differential scanning calorimetry(DSC). Secondly, the prefreezing temperature and time were determined by an electrical resistance method. The change rule of the freeze-drying shrinkage with the prefreezing temperature was discovered. Finally, complex-shaped ceramic parts were fabricated to verify the feasibility and effectiveness of the freeze-drying process.

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Periodical:

Advanced Materials Research (Volumes 230-232)

Pages:

256-260

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.230-232.256

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Online since:

May 2011

Authors:

Hai Hua Wu, Xuan Du, Qi Hua Tian

Keywords:

Low Dry Shrinkage, Structural Integrity, Vacuum Freeze Drying, Wet Gelcast Body

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References

[1] K. Cai, D. Guo, Y. Huang, J. Yang: J.Eur. Ceram.Soc.Vol. 23(2003),pp.921-925.

Google Scholar

[2] L. Xiang, D. C. Li, B. H. Lu, Y. P. Tang, L. Wang, Z. Wang: Rapid Prototyping J. Vol. 11(2005),pp.312-318.

Google Scholar

[3] L. Jongpaiboonkit, C. Y. Lin, P. H. Krebsbach, S. J. Hollister, J. W. Halloran: in Bioceramics 18, Pts 1 and 2, (Eds: T. Nakamura, K. Yamashita, M. Neo).Vol. 309-311(2006) pp.957-960.

Google Scholar

[4] A. Barati, M. Kokabi, M. H. N. Famili, J.Eur. Ceram.Soc.Vol. 23(2003),pp.2265-2272.

Google Scholar

[5] L. J. Vandeperre, A. M. De Wilde, J. Luyten:J. Mater. Process.Tech.Vol.135(2003), pp.312-316.

Google Scholar

[6] L. G. Ma, Y. Huang, J. L. Yang, H. R. Le, Y. Sun: J. Mater. Sci.Vol. 40 (2005), pp.4947-4949.

Google Scholar

[7] L. Bildstein, H. Hillaireau, D. Desmaele, S. Lepetre-Mouelhi, C. Dubernet, P. Couvreur: Int. J. Pharm.Vol. 381(2009), pp.140-145.

DOI: 10.1016/j.ijpharm.2009.04.002

Google Scholar

[8] J. Babic, M. a. J. Cantalejo, C. Arroqui: Food Sci. Technol. Vol. 42 (2009), pp.1325-1334.

Google Scholar

[9] S. J. Kim, S. G. Yoon, S. I. Kim: J. Appl. Polym. Sci.Vol. 91(2004), pp.3705-3709.

Google Scholar

[10] George W. Schere.: J. Am. Ceram.Soc.Vol. 73 (1990),pp.3-14.

Google Scholar