INFLUENCE OF SINTERING TEMPERATURE ON TRANSLUCENCY OF YTTRIA-STABILIZED ZIRCONIA FOR DENTAL CROWN APPLICATIONS

2016 ◽  
Vol 78 (11-3) ◽  
Author(s):  
Chin Chuin Hao ◽  
Andanastuti Muchtar ◽  
Che Husna Azhari ◽  
Masfueh Razali ◽  
Mohamed Aboras
Keyword(s):  
Light Scattering ◽  
Light Transmission ◽  
Sintering Temperature ◽  
High Density ◽  
Yttria Stabilized Zirconia ◽  
Integrating Sphere ◽  
Stabilized Zirconia ◽  
Scattering Effect ◽  
Light Scattering Effect ◽  
Dental Crown

This study aims to investigate the effect of sintering temperature on the translucency of yttria-stabilized zirconia (YSZ) for dental crown applications. YSZ suspension was treated by colloidal processing and 24 h of sedimentation to eliminate agglomerates and aggregates. The green bodies of YSZ were then shaped into pellets through slip casting. These bodies were sintered into a final shape at 1450 °C–1650 °C. The densities of the specimens were measured using Archimedes method. Light transmission of the YSZ specimen was also evaluated using a spectrophotometer with an integrating sphere. Morphological analysis was conducted with field-emission scanning electron microscopy. Results showed that sintering temperature significantly influenced the density, light transmission, and microstructure of YSZ. High sintering temperatures produced YSZ with a compact and homogeneous microstructure and a high density. Furthermore, the low light scattering effect on the porosity-free microstructure yielded light transmission as high as 37% in YSZ sintered at 1650 °C. The optimal sintering temperature was found to be 1600 °C, at which 34% light transmission was generated. In conclusion, high sintering temperatures improved the translucency of YSZ. This effect was attributed to effective densification of grains and elimination of pores at high temperatures, thereby alleviating the light scattering effect of the pores. At the optimal temperature, YSZ with high density and translucency and a compact microstructure was formed

A ZnO nanorod layer with a superior light-scattering effect for dye-sensitized solar cells

RSC Advances ◽  
2013 ◽  
Vol 3 (40) ◽  
pp. 18537 ◽  
Author(s):  
Rui Gao ◽  
Zhiqiang Liang ◽  
Jianjun Tian ◽  
Qifeng Zhang ◽  
Liduo Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Light Scattering ◽  
Dye Sensitized Solar Cells ◽  
Zno Nanorod ◽  
Dye Sensitized ◽  
Scattering Effect ◽  
Sensitized Solar Cells ◽  
Light Scattering Effect

Synthesis and Properties of Composite Stabilized ZrO2

2013 ◽  
Vol 544 ◽  
pp. 68-71
Author(s):  
Jing Hui Cui ◽  
Tao Feng ◽  
Jin Feng Xia ◽  
Dan Yu Jiang ◽  
Ge Ming Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Sintering Temperature ◽  
Decomposition Temperature ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Muffle Furnace ◽  
Flexure Strength ◽  
Different Temperatures ◽  
Zirconia Electrolyte

Through Mechanical grounding method, CaZrO3 – 8YSZ(8% in mol yttria stabilized zirconia) electrolyte samples with different amounts of CaZrO3 at 10wt%, 20wt%, 30wt% were sintered at different temperatures in Muffle furnace. The decomposition temperature of CaZrO3 is 825°C-900°C under one atmosphere. At high temperature, CaZrO3 decomposes into CaO and ZrO2. So Y2O3-CaO-ZrO2 complex is composed. The effects of the sintering temperature and the contents of the CaZrO3 on the conductivity, porosity, flexure strength, hardness were investigated. XRD and SEM were used to analyse the compositions and microcosmic morphology.

Performance Investigation of Dual Layer Yttria-Stabilized Zirconia–Samaria-Doped Ceria Electrolyte for Intermediate Temperature Solid Oxide Fuel Cells

2016 ◽  
Vol 13 (1) ◽  
Author(s):  
Ryan J. Milcarek ◽  
Kang Wang ◽  
Michael J. Garrett ◽  
Jeongmin Ahn
Keyword(s):  
Fuel Cell ◽  
Buffer Layer ◽  
Sintering Temperature ◽  
Solid Oxide ◽  
Yttria Stabilized Zirconia ◽  
Cell Performance ◽  
Doped Ceria ◽  
Oxide Fuel ◽  
Stabilized Zirconia ◽  
Fuel Cell Performance

The performance of yttria-stabilized zirconia (YSZ)–samaria-doped ceria (SDC) dual layer electrolyte anode-supported solid oxide fuel cell (AS-SOFC) was investigated. Tape-casting, lamination, and co-sintering of the NiO–YSZ anode followed by wet powder spraying of the SDC buffer layer and BSCF cathode was proposed for fabrication of these cells as an effective means of reducing the number of sintering stages required. The AS-SOFC showed a significant fuel cell performance of ∼1.9 W cm−2 at 800 °C. The fuel cell performance varies significantly with the sintering temperature of the SDC buffer layer. An optimal buffer layer sintering temperature of 1350 °C occurs due to a balance between the YSZ–SDC contact and densification at low sintering temperature and reactions between YSZ and SDC at high sintering temperatures. At high sintering temperatures, the reactions between YSZ and SDC have a detrimental effect on the fuel cell performance resulting in no power at a sintering temperature of 1500 °C.

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