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Dilatometric characteristics of weakly sintered ceramics

Yury I. Komolikov, Larisa V. Ermakova, Vladimir R. Khrustov, Victor D. Zhuravlev


Thermal expansion of refractory ceramics CaZrO3, MgAl2O4, La2Zr2O7 and YSZ-12 was studied. The samples of the complex oxides were synthesized by solution combustion synthesis with glycine; the fuel:oxidant ratio was varied depending on the character of redox reaction. The linear thermal expansion coefficient (LTEC) of ceramics was measured on the samples with an initial density 23–52%. The maximal sinterability of 89–92% after 6 h annealing at 1550 °С was demonstrated by La2Zr2O7 and YSZ-12, and the minimal values (78–82%) – by CaZrO3 and MgAl2O4. All materials have close LTEC values, from 9.0 to 9.6·10–6 K–1.


refractory oxide; weakly sintered ceramics; linear thermal expansion coefficient; thermal expansion; ceramic density

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Chimica Techno Acta, 2014-2023
ISSN 2411-1414 (Online)
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