Microstructure and Crystal Phase Development of Y2O3-Stabilized ZrO2 Polycrystal Fabricated by the Solid Phase Mixing and Sintering Method

2007 ◽  
Vol 115 (1339) ◽  
pp. 210-215 ◽  
Author(s):  
Hiroshi OHNISHI ◽  
Tetsurou FUKUHARA ◽  
Toshio KAWANAMI ◽  
Tohru SEKINO ◽  
Yuichi IKUHARA ◽  
...  
Keyword(s):  
Solid Phase ◽  
Crystal Phase ◽  
Phase Mixing ◽  
Phase Development ◽  
Sintering Method

scholarly journals Mechanical properties of Y2O3-stabilized ZrO2 polycrystals fabricated by the solid phase mixing and sintering method

2008 ◽  
Vol 116 (1351) ◽  
pp. 491-496 ◽  
Author(s):  
Hiroshi OHNISHI ◽  
Hironori NAKA ◽  
Tohru SEKINO ◽  
Yuichi IKUHARA ◽  
Koichi NIIHARA
Keyword(s):  
Mechanical Properties ◽  
Solid Phase ◽  
Phase Mixing ◽  
Sintering Method

scholarly journals Thermal Conductivity and Sintering Behavior of Sm2Zr2O7 Ceramics with Y3+ Substitution for Different Lattices

2021 ◽  
Author(s):  
Zhaolu Xue ◽  
Xin Wang ◽  
Mengchuan Shi ◽  
Haiyuan Yu ◽  
Xin Zhang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
High Temperature ◽  
Solid Phase ◽  
Temperature Stability ◽  
Crystal Phase ◽  
Sintering Behavior ◽  
Thermal Barrier ◽  
High Temperature Stability ◽  
Promising Candidate ◽  
Sintering Method

Abstract Sm2Zr2O7 is one of the most promising candidate materials for ultra-high temperature thermal barrier coatings. In this paper, a series of (Sm1-x1Yx1)2(Zr1-x2Yx2)2O7-x2 ceramics with different lattice sites replaced by Y3+ ions were successfully prepared by the high-temperature solid-phase sintering method. The effect of Y3+ doping on microstructure, phase composition, thermal conductivity and sintering behavior of modified Sm2Zr2O7 ceramics were investigated, respectively. The results showed that (Sm1-x1Yx1)2(Zr1-x2Yx2)2O7-x2 were composed of a single pyrochlore crystal phase within 20% Y3+ ions doping concentration. Compared with pure Sm2Zr2O7, the fracture toughness of each (Sm1-x1Yx1)2(Zr1-x2Yx2)2O7-x2 ceramic was significantly reduced. In terms of reducing the thermal conductivity of Sm2Zr2O7, the substitution of Y3+ ion for Zr4+ was more obvious than the substitution of Y3+ for Sm3+. Thermal conductivity of Sm2(Zr0.9Y0.1)2O6.9 was 1.315 W·m-1·K-1 at 1200 °C, which was the lowest among the studied ceramics.. Sm2(Zr0.9Y0.1)2O6.9 ceramic exhibited a lower grain growth rate at 1400 °C, and still remained a single pyrochlore crystal phase after sintering for 100 h, indicating that Sm2(Zr0.9Y0.1)2O6.9 had good high-temperature stability at 1400 °C.

scholarly journals Mechanical properties of 2.0-3.5 mol% Y2O3-stabilized zirconia polycrystals fabricated by the solid phase mixing and sintering method

2008 ◽  
Vol 116 (1360) ◽  
pp. 1270-1277 ◽  
Author(s):  
Hiroshi OHNISHI ◽  
Hironori NAKA ◽  
Tohru SEKINO ◽  
Yuichi IKUHARA ◽  
Koichi NIIHARA
Keyword(s):  
Mechanical Properties ◽  
Solid Phase ◽  
Stabilized Zirconia ◽  
Phase Mixing ◽  
Sintering Method

scholarly journals Synthesis of Ge1−xSnx Alloy Thin Films by Rapid Thermal Annealing of Sputtered Ge/Sn/Ge Layers on Si Substrates

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2248 ◽  
Author(s):  
Hadi Mahmodi ◽  
Md Hashim ◽  
Tetsuo Soga ◽  
Salman Alrokayan ◽  
Haseeb Khan ◽  
...  
Keyword(s):  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Near Infrared ◽  
Annealing Temperature ◽  
Solid Phase ◽  
Infrared Region ◽  
Alloy Formation ◽  
Phase Mixing ◽  
Si Substrates ◽  
Msm Photodetector

In this work, nanocrystalline Ge1−xSnx alloy formation from a rapid thermal annealed Ge/Sn/Ge multilayer has been presented. The multilayer was magnetron sputtered onto the Silicon substrate. This was followed by annealing the layers by rapid thermal annealing, at temperatures of 300 °C, 350 °C, 400 °C, and 450 °C, for 10 s. Then, the effect of thermal annealing on the morphological, structural, and optical characteristics of the synthesized Ge1−xSnx alloys were investigated. The nanocrystalline Ge1−xSnx formation was revealed by high-resolution X-ray diffraction (HR-XRD) measurements, which showed the orientation of (111). Raman results showed that phonon intensities of the Ge-Ge vibrations were improved with an increase in the annealing temperature. The results evidently showed that raising the annealing temperature led to improvements in the crystalline quality of the layers. It was demonstrated that Ge-Sn solid-phase mixing had occurred at a low temperature of 400 °C, which led to the creation of a Ge1−xSnx alloy. In addition, spectral photo-responsivity of a fabricated Ge1−xSnx metal-semiconductor-metal (MSM) photodetector exhibited its extending wavelength into the near-infrared region (820 nm).

scholarly journals Preparation and characterization of zirconia-alumina system via solution and solid phase mixing method

2018 ◽  
Author(s):  
Yanwar Faza ◽  
Zulia Hasratiningsih ◽  
Andrie Harmaji ◽  
I Made Joni
Keyword(s):  
Solid Phase ◽  
Phase Mixing ◽  
Mixing Method

Zinc Blende and Wurtzite Crystal Phase Mixing and Transition in Indium Phosphide Nanowires

Nano Letters ◽  
2011 ◽  
Vol 11 (10) ◽  
pp. 4314-4318 ◽  
Author(s):  
Keitaro Ikejiri ◽  
Yusuke Kitauchi ◽  
Katsuhiro Tomioka ◽  
Junichi Motohisa ◽  
Takashi Fukui
Keyword(s):  
Indium Phosphide ◽  
Crystal Phase ◽  
Phase Mixing ◽  
Zinc Blende

Liquid- and solid-phase mixing in sectionalized bubble column slurry reactor

1990 ◽  
Vol 29 (7) ◽  
pp. 1503-1509 ◽  
Author(s):  
Ashok S. Khare ◽  
Sanjeev V. Dharwadkar ◽  
Jyeshtharaj B. Joshi ◽  
Man Mohan Sharma
Keyword(s):  
Solid Phase ◽  
Bubble Column ◽  
Slurry Reactor ◽  
Phase Mixing

STUDY ON ABNORMAL PHENOMENON ABOUT ENHANCED ELECTRICAL CONDUCTIVITY OF Bi1-xBaxFeO3 CERAMICS

2014 ◽  
Vol 28 (05) ◽  
pp. 1450009 ◽  
Author(s):  
H. J. WANG ◽  
S. Y. WANG ◽  
W. F. LIU ◽  
X. J. XI ◽  
FENG GUO ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Photoelectron Spectroscopy ◽  
Oxygen Vacancies ◽  
Solid Phase ◽  
Electrical Conductance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Multiferroic Properties ◽  
Abnormal Phenomenon ◽  
Sintering Method

In order to investigate the effects of Ba doping BiFeO 3 on multiferroic properties, Bi 1-x Ba x FeO 3(0≤x≤1)( Ba x BFO ) ceramics were fabricated via rapid solid phase sintering method, and material's structures and electrical properties were investigated. The phase transitions from rhombohedral to pseudo-cubic (x = 10%) and then to tetragonal (x = 40%) were confirmed by X-ray diffraction investigation. Although the electrical conductivity of Ba x BFO (x = 10%, 20% and 30%) ceramics was low, which is a similar trend to previous reports, an abnormal enhancement of electrical conductance was observed in Ba x BFO (x = 1%, 3% and 5%) ceramics. Such as, the electrical conductivity of Ba 0.03 BFO is calculated to be ~106 Ω⋅ cm that is five orders of magnitude higher than that of the BiFeO 3. This has been discussed and ascribed to more percent of oxygen vacancies and Fe 2+ ions in Ba x BFO ceramics, as confirmed by X-ray photoelectron spectroscopy investigation.

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