Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-23T04:32:49.707Z Has data issue: false hasContentIssue false
  • English
  • Français

Direct coagulation casting of alumina via controlled release of calcium from ammonium polyphosphate chelate complex

Published online by Cambridge University Press:  13 January 2016

MingHao Yang ,
Jie Xu ,
Ke Gan ,
Yanan Qu ,
Ning Ma ,
Xiuhui Wang  and
Jinlong Yang
MingHao Yang*
Affiliation:
School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning, China
Jie Xu*
Affiliation:
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Ke Gan
Affiliation:
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Yanan Qu
Affiliation:
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Ning Ma*
Affiliation:
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Xiuhui Wang
Affiliation:
School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning, China
Jinlong Yang*
Affiliation:
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
*
a) Address all correspondence to these authors. e-mail: [email protected]
b) e-mail: [email protected]
Get access

Abstract

Direct coagulation casting of alumina via controlled release of high valence counter ions using ammonium polyphosphate (APP) chelate complex as the coagulating agent was proposed. APP chelate complex suspension was prepared from APP and calcium chloride. Calcium used as high valence counter ions was chelated by APP. The average particle size of the chelate complex is 0.13 μm with a narrow particle size distribution which is close to the size of alumina particles. Glycerol diacetate was used to tailor the pH value of the suspension by hydrolysis which produces acetic acid. The lowering of the pH value helps to decompose the chelate complex, and enhance to release the calcium chelated. It is indicated that the viscosity of the suspensions with the addition of APP chelate complex suspension and glycerol diacetate increases to approximately 20 Pa s after heating at 40–70 °C for 1.5–5 h, which is high enough to coagulate the suspension. 55 vol% alumina suspension with a addition of 3 vol% APP chelate complex suspension and 5 vol% glycerol diacetate treated at 60 °C could coagulate completely within 2 h with a compressive strength of 2.1 MPa. Dense alumina with a relative density of above 97% and a flexural strength of 388 ± 23 MPa can be prepared by this method from 55 vol% alumina suspensions without a burnout process.

Keywords

direct coagulation castinghigh valence counter ionsaluminaammonium polyphosphatechelate complexglycerol diacetate
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 1: Annual Issue: Early Career Scholars in Materials Science , 14 January 2016 , pp. 154 - 162
Copyright
Copyright © Materials Research Society 2016 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Gauckler, L.J., Graule, T., and Baader, F.: Ceramic forming using enzyme catalyzed reactions. Mater. Chem. Phys. 61(1), 78 (1999).CrossRefGoogle Scholar
Lewis, J.A.: Colloidal processing of ceramics. J. Am. Ceram. Soc. 83(10), 2341 (2000).Google Scholar
Hidber, P.C., Graule, T.J., and Gauckler, L.J.: Influence of the dispersant structure on properties of electrostatically stabilized aqueous alumina suspensions. J. Eur. Ceram. Soc. 17(2), 239 (1997).Google Scholar
Tomasik, P., Schilling, C.H., Jankowiak, R., and Kim, J.C.: The role of organic dispersants in aqueous alumina suspensions. J. Eur. Ceram. Soc. 23(6), 913 (2003).Google Scholar
Balzer, B., Hruschka, M.K., and Gauckler, L.J.: In situ rheological investigation of the coagulation in aqueous alumina suspensions. J. Am. Ceram. Soc. 84(8), 1733 (2001).Google Scholar
Balzer, B., Hruschka, M.K., and Gauckler, L.J.: Coagulation kinetics and mechanical behavior of wet alumina green bodies produced via DCC. J. Colloid Interface Sci. 216(2), 379 (1999).Google Scholar
Yang, J., Huang, Y., Meier, L.P., Wyss, H., Tervoort, E., and Gauckler, L.J.: Direct coagulation casting via increasing ionic strength. Key Eng. Mater. 224, 631 (2002).Google Scholar
Xie, Z., Yang, J., Huang, Y., Will, J., and Gauckler, L.J.: The effect of boehmite on wet green strength for direct coagulation casting of alumina. J. Inorg. Mater. 12, 855 (1997).Google Scholar
Hesselbarth, D., Tervoort, E., Urban, C., and Gauckler, L.J.: Mechanical properties of coagulated wet particle networks with alkali‒swellable thickeners. J. Am. Ceram. Soc. 84(8), 1689 (2001).Google Scholar
Laucournet, R., Pagnoux, C., Chartier, T., and Baumard, J.F.: Coagulation method of aqueous concentrated alumina suspensions by thermal decomposition of hydroxyaluminum diacetate. J. Am. Ceram. Soc. 83(11), 2661 (2000).CrossRefGoogle Scholar
Binner, J.G., McDermott, A.M., Yin, Y., Sambrook, R.M., and Vaidhyanathan, B.: In situ coagulation moulding: A new route for high quality, net-shape ceramics. Ceram. Int. 32(1), 29 (2006).Google Scholar
Binner, J.G., Santacruz, I., and McDermott, A.M.: Rheological characterisation of electrosterically dispersed alumina suspensions during in situ coagulation. J. Am. Ceram. Soc. 89(3), 863 (2006).CrossRefGoogle Scholar
Binner, J.G. and Mcdermott, A.M.: In-situ acidification of electrosterically dispersed alumina suspensions: Effect of coagulant structure. J. Mater. Sci. 41(7), 1893 (2006).Google Scholar
Prabhakaran, K., Sooraj, R., Melkeri, A., Gokhale, N.M., and Sharma, S.C.: A new direct coagulation casting process for alumina slurries prepared using poly (acrylate) dispersant. Ceram. Int. 35(3), 979 (2009).Google Scholar
Prabhakaran, K., Raghunath, S., Melkeri, A., Gokhale, N.M., and Sharma, S.C.: Novel coagulation method for direct coagulation casting of aqueous alumina slurries prepared using a poly (acrylate) dispersant. J. Am. Ceram. Soc. 91(2), 615 (2008).CrossRefGoogle Scholar
Derjaguin, B.V.: Theory of the stability of strongly charged lyophobic sols and the adhesion of strongly charged particles in solutions of electrolytes. Acta Physicochim. USSR 14, 633 (1941).Google Scholar
Hall, S.B., Duffield, J.R., and Williams, D.R.: A reassessment of the applicability of the DLVO theory as an explanation for the Schulze-Hardy rule for colloid aggregation. J. Colloid Interface Sci. 143(2), 411 (1991).Google Scholar
Hsu, J.P. and Kuo, Y.C.: The critical coagulation concentration of counterions: Spherical particles in asymmetric electrolyte solutions. J. Colloid Interface Sci. 185(2), 530 (1997).Google Scholar
Xu, J., Wen, N., Li, H., Qi, F., Xi, X., and Yang, J.: Direct coagulation casting of alumina suspension by high valence counter ions using Ca(IO3)2 as coagulating agent. J. Am. Ceram. Soc. 95(8), 2525 (2012).CrossRefGoogle Scholar
Xu, J., Qu, Y., Xi, X., and Yang, J.: Properties of alumina coagulated bodies prepared by direct coagulation casting via high valence counter ions (DCC‒HVCI). J. Am. Ceram. Soc. 95(11), 3415 (2012).Google Scholar
Xu, J., Wen, N., Qi, F., Li, H., and Yang, J.: Direct coagulation casting of positively charged alumina suspension by controlled release of high valence counter ions from calcium phosphate. J. Am. Ceram. Soc. 95(7), 2155 (2012).Google Scholar
Yang, J., Xu, J., Wen, N., Qu, Y., Qi, F., and Xi, X.: Direct coagulation casting of alumina suspension via controlled release of high valence counter ions from thermo‒sensitive liposomes. J. Am. Ceram. Soc. 96(1), 62 (2013).CrossRefGoogle Scholar
Xu, J., Zhang, Y., Qu, Y., Qi, F., Zhang, X., and Yang, J.: Direct coagulation casting of alumina suspension from calcium citrate assisted by pH shift. J. Am. Ceram. Soc. 97(4), 1048 (2014).Google Scholar
Xu, J., Qu, Y., Qi, F., Wang, Y., and Yang, J.: Direct coagulation casting of alumina using magnesium citrate as coagulating agent with glycerol diacetate as pH regulator. J. Mater. Sci. 49(16), 5564 (2014).Google Scholar
Xu, J., Gan, K., Yang, M., Qu, Y., Wu, J., and Yang, J.: Direct coagulation casting of yttria-stabilized zirconia using magnesium citrate and glycerol diacetate. Ceram. Int. 41(4), 5772 (2015).Google Scholar
van Wazer, J.R. and Callis, C.F.: Metal complexing by phosphates. Chem. Rev. 58(6), 1011 (1958).Google Scholar
Flory, P.J.: Principles of Polymer Chemistry (Cornell University Press, London, 1953).Google Scholar
Haas, P.A.: Gel processes for preparing ceramics and glasses. Chem. Eng. Sci. 85(4), 44 (1989).Google Scholar
Graule, T.J., Baader, F.H., and Gaucker, L.J.: Casting uniform ceramics with direct coagulation. ChemTech 25(6), 31 (1995).Google Scholar
He, X., Su, B., Zhou, X., Yang, J., Zhao, B., Wang, X., Yang, G., Tang, Z., and Qiu, H.: Gelcasting of alumina ceramic using an egg white protein binder system. Ceram.-Silik. 55(1), 1 (2011).Google Scholar
Xu, J., Zhang, Y., Gan, K., Zhang, X., Qu, Y., Ma, N., and Yang, J.: A novel gelcasting of alumina suspension using curdlan gelation. Ceram. Int. 41(9), 10520 (2015).Google Scholar