Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-03T05:10:50.992Z Has data issue: false hasContentIssue false
  • English
  • Français

A critical evaluation of reactive templated grain growth (RTGG) mechanisms in highly [001] textured Sr0.61Ba0.39Nb2O6 ferroelectric-thermoelectrics

Published online by Cambridge University Press:  23 November 2011

Yunfei Chang ,
Soonil Lee ,
Stephen Poterala ,
Clive A. Randall  and
Gary L. Messing
Yunfei Chang*
Affiliation:
Department of Materials Science and Engineering, Center for Dielectric Studies, Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802
Soonil Lee
Affiliation:
Department of Materials Science and Engineering, Center for Dielectric Studies, Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802
Stephen Poterala
Affiliation:
Department of Materials Science and Engineering, Center for Dielectric Studies, Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802
Clive A. Randall
Affiliation:
Department of Materials Science and Engineering, Center for Dielectric Studies, Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802
Gary L. Messing
Affiliation:
Department of Materials Science and Engineering, Center for Dielectric Studies, Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

In reactive templated grain growth (RTGG), oriented template crystals are used to seed both phase formation and crystallographic orientation in textured ceramics. This mechanism differs substantially from templated grain growth (TGG), in which texture forms via grain growth mechanism. In this work, characteristics of both RTGG and TGG processes are evaluated in [001] textured Sr0.61Ba0.39Nb2O6 ceramics produced from reactive SrNb2O6 and BaNb2O6 matrix powders and acicular KSr2Nb5O15 (KSN) templates. Above 1100 °C, SrxBa1−xNb2O6 (SBN) forms by oriented nucleation and growth on KSN (the RTGG process) and by nucleation of nonoriented matrix grains. RTGG occurs without densification or coarsening until phase formation is complete (∼1250 °C) and accounts for ∼60% of the texture in dense SBN ceramics. A later TGG process occurs from 1250–1350 °C and is characterized by simultaneous densification, grain growth, and additional texture development.

Keywords

TextureThermoelectricCrystal growth
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 24 , 28 December 2011 , pp. 3044 - 3050
Copyright
Copyright © Materials Research Society 2011

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.Neurgaonkar, R.R. and Cross, L.E.: Piezoelectric tungsten bronze crystals for SAW device applications. Mater. Res. Bull. 21, 893 (1986).CrossRefGoogle Scholar
2.Tian, L., Scrymgeour, D.A., Sharan, A., and Gopalan, V.: Anomalous electro-optic effect in Sr0.6Ba0.4Nb2O6 single crystals and its application in two-dimensional laser scanning. Appl. Phys. Lett. 83, 4375 (2003).CrossRefGoogle Scholar
3.Neurgaonkar, R.R., Oliver, J.R., Cory, W.K., Cross, L.E., and Viehland, D.: Piezoelectricity in tungsten bronze crystals. Ferroelectrics 160, 265 (1994).CrossRefGoogle Scholar
4.Malyshkina, O.V., Movchikova, A.A., and Ped’Ko, B.B.: Effect of annealing on the pyroelectric properties of SBN crystals. Phys. Solid State 48, 1038 (2006).CrossRefGoogle Scholar
5.Lee, S.N., Wilke, R.H.T., Trolier-McKinstry, S., Zhang, S.J., and Randall, C.A.: SrxBa1-xNb2O6-δ ferroelectric-thermoelectrics: Crystal anisotropy, conduction mechanism, and power factor. Appl. Phys. Lett. 96, 031910 (2010).CrossRefGoogle Scholar
6.Lee, S.N., Dursun, S., Duran, C., and Randall, C.A.: Thermoelectric power factor enhancement of textured ferroelectric SrxBa1-xNb2O6-δ. J. Mater. Res. 26, 26 (2011).CrossRefGoogle Scholar
7.Jamieson, P.B., Abrahams, S.C., and Bernstein, J.I.: Ferroelectric tungsten bronze-type crystal structures. I. barium strontium niobate Ba0.27Sr0.75Nb2O5.78. J. Chem. Phys. 48, 5048 (1968).CrossRefGoogle Scholar
8.Lee, W.J. and Fang, T.T.: Nonisothermal reaction kinetics of SrNb2O6 and BaNb2O6 for the formation of SrxBa1-xNb2O6. J. Am. Ceram. Soc. 81, 193 (1998).CrossRefGoogle Scholar
9.Oliver, J.R., Neurgaonkar, R.R., and Cross, L.E.: A thermodynamic phenomenology for ferroelectric tungsten bronze Sr0.6Ba0.4Nb2O6 (SBN: 60). J. Appl. Phys. 64, 37 (1988).CrossRefGoogle Scholar
10.Messing, G.L., Trolier-McKinstry, S., Sabolsky, E.M., Duran, C., Kwon, S., Brahmaroutu, B., Park, P., Yilmaz, H., Rehrig, P.W., Eitel, K.B., Suvaci, E., Seabaugh, M., and Oh, K.S.: Templated grain growth of textured piezoelectric ceramics. Crit. Rev. Solid State Mater. Sci. 29, 45 (2004).CrossRefGoogle Scholar
11.Brosnan, K.H., Poterala, S.F., Meyer, R.J., Misture, S., and Messing, G.L.: Templated grain growth of <001> textured PMN-28PT using SrTiO3 templates. J. Am. Ceram. Soc. 92, s133 (2009).CrossRefGoogle Scholar
12.Chang, Y.F., Poterala, S., Yang, Z.P., Trolier-McKinstry, S., and Messing, G.L.: Microstructure development and piezoelectric properties of highly textured CuO-doped KNN by templated grain growth. J. Mater. Res. 25, 687 (2010).CrossRefGoogle Scholar
13.Duran, C., Trolier-McKinstry, S., and Messing, G.L.: Dielectric and piezoelectric properties of textured Sr0.53Ba0.47Nb2O6 ceramics prepared by templated grain growth. J. Mater. Res. 17, 2399 (2002).CrossRefGoogle Scholar
14.Tani, T.: Crystalline-oriented piezoelectric bulk ceramics with a perovskite-type structure. J. Korean Phys. Soc. 32(3), S1217 (1998).Google Scholar
15.Cheng, C.T., Lanagan, M., Jones, B., Lin, J.T., and Pan, M.J.: Crystallization kinetics and phase development of PbO-BaO-SrO-Nb2O5-B2O3-SiO2-based glass-ceramics. J. Am. Ceram. Soc. 88(11), 3037 (2005).CrossRefGoogle Scholar
16.Duran, C., Messing, G.L., and Trolier-McKinstry, S.: Densification and phase formation in seeded, reactively sintered Sr0.53Ba0.47Nb2O6 ceramics. J. Mater. Sci. 37, 5041 (2002).CrossRefGoogle Scholar
17.Yang, Z.P., Wei, L.L., Chang, Y.F., and Liu, B.: Synthesis of anisometric KSr2Nb5O15 particles in the SrNb2O6-Nb2O5-KCl system. J. Mater. Sci. 42, 3627 (2007).CrossRefGoogle Scholar
18.Lotgering, F.K.: Topotactical reactions with ferrimagnetic oxides having hexagonal crystal structures. J. Inorg. Nucl. Chem. 9, 113 (1959).CrossRefGoogle Scholar
19.Lee, H.Y. and Freer, R.: Abnormal grain growth and liquid-phase sintering in Sr0.6Ba0.4Nb2O6, SBN40 ceramics. J. Mater. Sci. 33, 1703 (1998).CrossRefGoogle Scholar
20.Carruthers, J.R. and Grasso, M.: Phase equilibria relations in the ternary system BaO-SrO-Nb2O5. J. Electrochem. Soc. 117, 1426 (1970).CrossRefGoogle Scholar