Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2024-12-23T11:43:21.776Z Has data issue: false hasContentIssue false
  • English
  • Français

Processing and electrical properties of Pb0.6Ba0.4Nb2O6 ceramics

Published online by Cambridge University Press:  31 January 2011

Sinan Dursun  and
Cihangir Duran
Sinan Dursun
Affiliation:
Gebze Institute of Technology, Department of Materials Science and Engineering, 41400 Gebze/Kocaeli, Turkey
Cihangir Duran*
Affiliation:
Gebze Institute of Technology, Department of Materials Science and Engineering, 41400 Gebze/Kocaeli, Turkey
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

Lead barium niobate (PBN or PbxBa1–xNb2O6) is a promising tungsten bronze ceramic system that has a morphotropic phase boundary between the orthorhombic and tetragonal phases at x ≈ 0.63, where the spontaneous polarization (Ps ≈ 60–70 μC/cm2) and other ferroelectric properties are known to be higher. However, even textured PBN60 ceramics have low Ps (∼23.9 μC/cm2) and piezoelectric charge coefficient (d33 ≈ 236 pC/N) as compared to the single crystal counterparts. The aim of this study is to control powder processing, green body formation, and sintering conditions to enhance both densification and electrical properties. Therefore, samples were prepared by tape casting methods using single phase PBN60 and reactive mixture of PbNb2O6 and BaNb2O6 powders. Three wt% excess PbO was found to be necessary for densification. Our results showed that undoped PBN60 ceramics reached Ps = 33 μC/cm2, d33 = 305 pC/N, and had a Tc = 340–350 °C. These results are much higher than the reported values in the literature, which can be attributed to the careful ceramic processing such as tape casting (e.g., homogenous green structure), annealing (e.g., control of excess grain boundary phase), and liquid phase sintering (e.g., higher densification).

Keywords

SinteringDielectric propertiesPiezoelectric
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 11 , November 2010 , pp. 2143 - 2149
Copyright
Copyright © Materials Research Society 2010

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

1.Oliver, J.R., Neurgaonkar, R.R., Cross, L.E.: Ferroelectric properties of tungsten bronze morphotropic phase boundary systems. J. Am. Ceram. Soc. 72, (2)202 (1989)CrossRefGoogle Scholar
2.Guo, R., Evans, H.T. Jr., Bahalla, A.S.: Crystal structure analysis of ferroelectric tetragonal tungsten bronze Pb0.596Ba0.404Nb2.037O6, Proceedings of International Symposium on Applications of Ferroelectrics Vol. 1 (IEEE, East Brunswick, NJ 1996)241244Google Scholar
3.Guo, R., Bahalla, A.S., Randall, C.A., Chang, Z.P., Cross, L.E.: Polarization mechanisms of morphotropic phase boundary lead barium niobate (PBN) compositions. J. Appl. Phys. 67, (3)1 (1990)CrossRefGoogle Scholar
4.Neurgaonkar, R.R., Cory, W.K., Oliver, J.R., Khoshnevisan, M., Sharp, E.J.: Ferroelectric tungsten bronze crystals and their photorefractive applications. Ferroelectrics 102, 3 (1990)CrossRefGoogle Scholar
5.Neurgaonkar, R.R., Cory, W.K., Oliver, J.R., Sharp, E.J., Wood, G.L., Salamo, G.J.: Growth and optical properties of ferroelectric tungsten bronze crystals. Ferroelectrics 142, 167 (1993)CrossRefGoogle Scholar
6.Arantes, V.L., De Paula, R.N., Santos, I.A., Garcia, D., Eiras, J.A.: Microstructure and densification behavior of (Pb,Ba)Nb2O6 ceramics obtained by hot-pressing technique. J. Mater. Sci. Lett. 19, 1677 (2000)CrossRefGoogle Scholar
7.Guo, R., Evans, H.T. Jr., Bhalla, A.S.: Crystal structure analysis and polarization mechanisms of ferroelectric tetragonal tungsten bronze lead barium niobate. Ferroelectrics 206–207, 123 (1998)CrossRefGoogle Scholar
8.Neurgaonkar, R.R., Oliver, J.R., Nelson, J.G., Cross, L.E.: Piezoelectric and ferroelectric properties of La-modified and unmodified tungsten bronze Pb0.6Ba0.4Nb2O6 dense ceramics. Mater. Res. Bull. 26, 771 (1991)CrossRefGoogle Scholar
9.Venet, M., Eiras, J.A., Garcia, D.: Anisotropic properties in textured lead barium niobate compositions around the morphotropic phase boundary. Solid State Ionics 180, 320 (2009)CrossRefGoogle Scholar
10.Chandramouli, K., Reddy, G.S., Ramam, K.: Electromechanical studies of Ce-doped lead barium niobate (PBN60) ceramic. Scr. Mater. 59, 235 (2008)CrossRefGoogle Scholar
11.Rahaman, M.N., De Jonghe, L.C.: Reaction sintering of zinc ferrite during constant rates of heating. J. Am. Ceram. Soc. 76, 1739 (1993)CrossRefGoogle Scholar
12.Hiroshima, T., Tanaka, K., Kimura, T.: Effects of microstructure and composition on the Curie temperature of lead barium niobate solid solutions. J. Am. Ceram. Soc. 79, (12)3235 (1996)CrossRefGoogle Scholar
13.Neurgaonkar, R.R., Cory, W.K., Oliver, J.R., Sharp, E.J.: Linear and nonlinear optical properties of tungsten bronze crystals, Proceedings of the 7th IEEE International Symposium on Applications of Ferroelectrics (Urbana–Champaign IL 1990)104107Google Scholar
14.Ramam, K., Chandramouli, K.: Investigation on electromechanical properties of A-site donor rare-earth modified tetragonal (4 mm) lead barium niobate (PBN55) ceramics. J. Phys. Chem. Solids 70, 732 (2009)CrossRefGoogle Scholar
15.Duran, C., Trolier-McKinstry, S., Messing, G.L.: Processing and electrical properties of 0.5Pb(Yb1/2Nb1/2)O3-0.5PbTiO3 ceramics. J. Electroceram. 10, (1)47 (2003)CrossRefGoogle Scholar
16.Kirillov, V.V., Isupov, V.A.: Relaxation polarization of PbMg 1/3Nb2/3O3 (PMN)—A ferroelectric with a diffused phase transition. Ferroelectrics 5, 3 (1973)CrossRefGoogle Scholar
17.Uchino, K., Nomura, S.: Critical exponents of the dielectic constants in diffused-phase-transition crystals. Ferroelectr. Lett. Sect. 44, 55 (1982)CrossRefGoogle Scholar
18.Butcher, S.J., Thomas, N.W.: Ferroelectricity in the system Pb(1–x)Bax(Mg1/3Nb2/3)O3. J. Phys. Chem. Solids 52, 595 (1991)CrossRefGoogle Scholar