Processing and characterization of Ca-TZP nanoceramics

Autor:	Waldemar Pyda, Anna Łabuz, Bartosz Wójtowicz, Marian Rączka, Radosław Lach
Rok vydání:	2015
Předmět:	Materials science Calcium hydroxide Metallurgy law.invention chemistry.chemical_compound Tetragonal crystal system chemistry Chemical engineering law Specific surface area Materials Chemistry Ceramics and Composites Relative density Calcination Cubic zirconia Crystallite Calcium oxide
Zdroj:	Journal of the European Ceramic Society. 35:3943-3947
ISSN:	0955-2219
DOI:	10.1016/j.jeurceramsoc.2015.06.022
Popis:	The aim of this work was to prepare the calcia–zirconia nanopowder by method eliminating the problem of calcium ions losses. Therefore, a physical mixing of zirconia gel and calcium hydroxide was employed to obtain a precursor of the partially calcium oxide stabilized zirconia nanopowder. The mixture was calcined at 500 °C for 1 h in air. 4 mol% CaO–ZrO 2 nanopowder of tetragonal and monoclinic symmetry in the amount of 91.5% and 8.5%, respectively, average crystallites of 10 nm and specific surface area of about 117.6 m 2 /g was obtained. The second aim was to manufacture the calcium oxide stabilized tetragonal zirconia nanoceramics. The 4Ca-TZP sintered bodies with 100% of tetragonal symmetry, relative density above 99% and average grains size of 112.4 nm were manufactured by pressureless sintering for 2 h at 1200 °C in air. The sintered material shows a bending strength of about 730 MPa and is resistant to low-temperature degradation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::aca69752c36cf535a0e1f53cd393159e https://doi.org/10.1016/j.jeurceramsoc.2015.06.022 Zobrazit plný text záznamu Full Text from ScienceDirect