Influence of Calcination Temperature on the Microstructure and Mechanical Properties of a Gel‐Derived and Sintered 3 mol% Y‐TZP Material

Abstract

A pure coprecipitated 3 mol% Y‐TZP powder was subjected to two calcination temperatures, 600° and 1000°C, prior to compaction and sintering. Significant differences in the initial sintering behavior were observed. The lower temperature calcined powder exhibited abnormal grain growth. The resultant mechanical properties mirrored the microstructure with the lower temperature calcined material having lower flexural strength. Hardness measurements of the two sintered bodies revealed significant differences in the two phases of the lower temperature calcined material. Differences in reactivity of the two powders after calcination are suggested as the basis for the difference in microstructure and resultant mechanical properties.

Coprecipitation Synthesis of MgO‐Doped ZrO2 Nano Powder

“…In aqueous coprecipitation to obtain stabilized zirconia nanoparticles, ethanol is commonly used as a washing solvent to improve the dispersion of the product 10–13 . We compared the above results with the experiment shown by Fig.…”

“…In aqueous coprecipitation to obtain stabilized zirconia nanoparticles, ethanol is commonly used as a washing solvent to improve the dispersion of the product. [10][11][12][13] We compared the above results with the experiment shown by Fig. 4(j) in which the coprecipitation was carried out in water and the hydroxide precursor was washed with ethanol.…”

“…The specific advantages of nanocrystalline materials are superior phase homogeneity and possible low‐temperature sinterability that significantly determine the later‐stage processing and sintering properties, and eventually determine the microstructure of the ceramic. Until now, a large variety of methods such as hydrothermal or solvothermal treatment, 7–9 coprecipitation, 10–16 sol–gel, 17–19 ball milling of powder, 20,21 air‐plasma spraying method, 22 and others have been used to prepare nano‐stabilized zirconias.…”

“…13 Herein, alcohol played an important role in suppressing the formation of agglomerates and aggregates. It was commonly used as a washing solvent in precipitation, [10][11][12][13][14][15] and as a reaction solvent in the solvothermal 7,8 and sol-gel method. 18,19 Alcohol has also been used to control agglomeration during wet milling of powder.…”

Crystallization–stabilization mechanism of yttria-doped zirconia by hydrothermal treatment of mechanical mixtures of zirconia xerogel and crystalline yttria

“…The calcination of amorphous co-precipitates of (Zr-Y) hydroxides determines the crystallization of stabilized (t)-or (c)-zirconia in relation to the yttria content of the starting co-precipitate [15][16][17]. In this case the corresponding exothermic peak of crystallization shifts at increasing temperatures with the increase of the yttria content of the coprecipitate [18].…”