Abstract
Amorphous ZrW2O8 powder and amorphous SiO2 powder were prepared by a sol–gel process as raw materials, and high-density ZrW2O8–SiO2 were successfully prepared at a much lower temperature of 923 K for a much shorter holding time of 10 min by spark plasma sintering (SPS) method rather than by conventional melt-quenching method. The relative densities of 0.85ZrW2O8–0.15SiO2 and 0.70ZrW2O8–0.30SiO2 were 99.4% and 96.6%, respectively. The combined technique of a sol–gel process and SPS should enable us to prepare the varied types of high-density composites of ZrW2O8 without severe thermal cracking caused by melt-quenching. The thermal expansion properties and dielectric properties of ZrW2O8–SiO2 were also investigated.
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Acknowledgement
The authors gratefully thank Mr. M. Hashimoto, Yamaguchi Prefectural Industrial Technology Institute, for helpful suggestions and numerous discussions.
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Kanamori, K., Kineri, T., Fukuda, R. et al. Low-temperature sintering of ZrW2O8–SiO2 by spark plasma sintering. J Mater Sci 44, 855–860 (2009). https://doi.org/10.1007/s10853-008-3128-6
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DOI: https://doi.org/10.1007/s10853-008-3128-6