Abstract
Ceramic powders of (NdxGd1−x)2Zr2O7 (x = 0, 0.1, 0.3, 0.5, 0.7, 0.9, 1.0) were synthesized by chemical-coprecipitation followed by calcination method, and were then pressureless-sintered at 1,600 °C for 10 h in air. Phase constituents and morphologies of the synthesized powders and sintered ceramics were identified by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). A high-temperature dilatometer and a laser-flash method were used to analyze the thermal expansion coefficient and thermal diffusion coefficient of different ceramics from room temperature up to 1,400 °C. Thermal conductivity was calculated from thermal diffusivity, density, and specific heat. (NdxGd1−x)2Zr2O7 (0.1 ≤ x ≤ 1.0) ceramics are with a pyrochlore-type structure; however, pure Gd2Zr2O7 exhibits a defective fluorite-type structure. The average linear thermal expansion coefficients of different (NdxGd1−x)2Zr2O7 ceramics decrease with increasing the value of x from 0 to 1.0 in the temperature range of 25–1,400 °C. The thermal conductivities of (NdxGd1−x)2Zr2O7 ceramics are located within the range of 1.33 to 2.04 W m−1 K−1 from room temperature to 1,400 °C.
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References
Padture NP, Gell M, Jordan EH (2002) Science 296:280
Belmonte M (2006) Adv Eng Mater 8:693
Cao XQ, Vassen R, Stoever D (2004) J Eur Ceram Soc 24:1
Zhu D, Miller RA (2004) Int J Ceram Technol 1:86
Wu J, Wei XZ, Padture NP et al (2002) J Am Ceram Soc 85:3031
Suresh G, Seenivasan G, Krishnaiah MV et al (1998) J Alloys Compd 269:L9
Vassen R, Cao XQ, Tietz F et al (2000) J Am Ceram Soc 83:2023
Lehmann H, Pitzer D, Pracht G et al (2003) J Am Ceram Soc 86:1338
Mandal BP, Tyagi AK (2007) J Alloys Compd 437:260
Mandal BP, Banerji A, Sathe V et al (2007) J Solid State Chem 180:2643
Kubaschewsji O, Alcock CB, Spencer PJ (1993) Materials thermochemistry, sixth edn. Pergamon Press, Oxford, pp 257–323
Swalin RA (1972) Thermodynamics of solids, second edn. John Wiley & Sons, New York, pp 53–87
Schlichting KW, Padture NP, Klemens PG (2001) J Mater Sci 36:3003
Diaz-Guillen JA, Diaz-Guillen MR, Almanza JM et al (2007) J Phys Condens Matter 19:356212
Rohrer GS (2004) Structure and bonding in crystalline materials. Cambridge University Press, Cambridge, pp 521–525
Yamamura H, Nishino H, Kakinuma K et al (2003) Solid State Ionics 158:359
Subramanian MA, Aravamudan G, Subba Rao GV (1983) Prog Solid State Chem 15:55
Vegard L (1921) Z Phys 5:17
Touloukian YS, Kirby RK, Taylor RE et al (1977) Thermal expansion—non-metallic solids, vol 13. IFI/Plenum, New York
Berman R (1976) Thermal conduction in solids. Clarendon Press, Oxford, pp 45–101
Mansal NP, Zhu DM (2007) Mater Sci Eng A 459:192
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The authors would like to thank the financial support of the Program of Excellent Teams in Harbin Institute of Technology (HIT) and the Start-up Program for High-level HIT Faculty Returned from Abroad.
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Liu, ZG., Ouyang, JH. & Zhou, Y. Preparation and thermophysical properties of (NdxGd1−x)2Zr2O7 ceramics. J Mater Sci 43, 3596–3603 (2008). https://doi.org/10.1007/s10853-008-2570-9
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DOI: https://doi.org/10.1007/s10853-008-2570-9