Abstract
We have studied the shrinkage kinetics and mechanism of NaZr2(PO4)3 containing inorganic additives. The sintering of NaZr2(PO4)3 containing ZnO microadditives is shown to follow a liquid-phase mechanism. Effective sintering aids include oxides of metals in the oxidation states 2+ and 3+ that are capable of reacting with sodium zirconium phosphate to form solid solutions. Ceramics having a relative density of 96–99% and isostructural with NaZr2(PO4)3 can be prepared by adding 0.75–2.0 wt % ZnO as a sintering aid capable of influencing the structure of grain boundaries in ceramic materials, pressing green bodies at 200–300 MPa, and sintering them at 1000–1100°C for 7–15 h.
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Original Russian Text © M.V. Sukhanov, V.I. Pet’kov, D.V. Firsov, 2011, published in Neorganicheskie Materialy, 2011, Vol. 47, No. 6, pp. 753–757.
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Sukhanov, M.V., Pet’kov, V.I. & Firsov, D.V. Sintering mechanism for high-density NZP ceramics. Inorg Mater 47, 674–678 (2011). https://doi.org/10.1134/S0020168511060197
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DOI: https://doi.org/10.1134/S0020168511060197