Reduced Activation Energy for Grain Growth in Nanocrystalline Yttria-Stabilized Zirconia

Nano Letters ◽  
2003 ◽  
Vol 3 (3) ◽  
pp. 397-401 ◽  
Author(s):  
Satyajit Shukla ◽  
Sudipta Seal ◽  
Rashmi Vij ◽  
Sri Bandyopadhyay
Keyword(s):  
Activation Energy ◽  
Grain Growth ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia

Elaboration of Sol-Gel Derived Hydroxyapatite / Yttria Stabilized Zirconia Composite Coatings Obtained for Biomedical Application

2011 ◽  
Vol 312-315 ◽  
pp. 894-899
Author(s):  
Sahar Salehi ◽  
Mohammad Hosseien Fathi
Keyword(s):  
Grain Size ◽  
Crystallite Size ◽  
Grain Growth ◽  
Biomedical Application ◽  
Composite Coatings ◽  
Sol Gel ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Nanostructured Composite

In this study, nanostructured composite coatings of hydroxyapatite (HA)/ 30wt% yttria stabilized zirconia (YSZ) coatings containing 0, 3, 5, and 8 mol% Y2O3 (namely; HA-0YSZ, HA-3YSZ, HA-5YSZ, and HA-8YSZ) were successfully synthesized using the sol-gel method. The crystallite size of the coating was about ~44-58 nm for tetragonal and cubic zirconia grain size and 75-87 nm for hydroxyapatite grain size. Crack-free and homogeneous HA-YSZ composite coatings were obtained with no observable defects. The uniform distribution of zirconia particles in a composite would be highly beneficial for obtaining homogeneous coatings of HA-YSZ film and would hinder grain growth of HA phase during calcinations. In vitro evaluation in 0.9% NaCl showed that Ca2+ dissolution rate of composite coatings was lower than pure HA coatings.

The Effect of Conformation Method and Sintering Technique on the Densification and Grain Growth of Nanocrystalline 8 mol% Yttria-Stabilized Zirconia

2009 ◽  
Vol 92 (5) ◽  
pp. 990-995 ◽  
Author(s):  
Mehdi Mazaheri ◽  
Z. Razavi Hesabi ◽  
F. Golestani-Fard ◽  
S. Mollazadeh ◽  
S. Jafari ◽  
...  
Keyword(s):  
Grain Growth ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia

Crystallization and grain growth characteristics of yttria-stabilized zirconia thin films grown by pulsed laser deposition

2011 ◽  
Vol 191 (1) ◽  
pp. 12-23 ◽  
Author(s):  
Sebastian Heiroth ◽  
Ruggero Frison ◽  
Jennifer L.M. Rupp ◽  
Thomas Lippert ◽  
Eszter J. Barthazy Meier ◽  
...  
Keyword(s):  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Grain Growth ◽  
Pulsed Laser ◽  
Growth Characteristics ◽  
Yttria Stabilized Zirconia ◽  
Laser Deposition ◽  
Stabilized Zirconia

scholarly journals Destabilization and ion conductivity of yttria-stabilized zirconia for solid oxide electrolyte under thermal stress

2021 ◽  
Author(s):  
Hwanseok Lee ◽  
Kanghee Jo ◽  
Min-sung Park ◽  
Taewoo Kim ◽  
Heesoo Lee
Keyword(s):  
Activation Energy ◽  
Thermal Stress ◽  
Atomic Structure ◽  
Aging Temperature ◽  
Oxygen Vacancies ◽  
Local Atomic Structure ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Average Grain Size ◽  
Different Temperatures

Abstract The degradation behavior of yttria-stabilized zirconia under thermal stress was investigated in terms of phase transformation, local atomic structure, and electrical conductivity. The average grain size of 8YSZ were increased from 20.83 µm to 25.81 µm with increasing aging temperature. All 8YSZ samples degraded at different temperatures had a predominantly cubic structure. The (400) peak of 8YSZ deteriorated at 1300 and 1400°C shifted to high angle, and the peak of tetragonal was not indexed. For 8YSZ degraded at 1500°C, the (400) peak shifted to a lower angle, and the peak of tetragonal was identified. In the local atomic structure of the aged 8YSZ with extended X-ray absorption fine structure, the intensity of the Zr-O peak gradually increased, and the intensity of the Zr-Cation peak decreased as the aging temperature increased. The changes in the peaks indicate that the oxygen vacancies were reduced and Y3+ ions escaped from the lattice, leading to destabilization of 8YSZ. The activation energies of 8YSZ at 1300°C and 1400°C were derived to be 0.86 and 0.87 eV, respectively, and the activation energy of 8YSZ at 1500°C increased significantly to 0.92 eV. With the thermal deterioration of 8YSZ, the cation (Y3+) escaped from the lattice and the number of oxygen vacancies decrease, resulting in the formation of a tetragonal structure and high activation energy at 1500°C.

Reduced activation energy and crystalline size for yttria-stabilized zirconia nano-crystals:

2004 ◽  
Vol 267 (1-2) ◽  
pp. 100-109 ◽  
Author(s):  
Shou-Gang Chen ◽  
Yan-Sheng Yin ◽  
Dao-Ping Wang ◽  
Jia Li
Keyword(s):  
Activation Energy ◽  
Yttria Stabilized Zirconia ◽  
Crystalline Size ◽  
Stabilized Zirconia
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