Low-temperature sintering and microstructure evolution of Bi2O3-doped YSZ

Han, Jianxun; Zhang, Jingde; Li, Fēi; Luan, Junpeng; Jia, Baoxin

doi:10.1016/j.ceramint.2017.10.039

Cited by 16 publications

(14 citation statements)

References 33 publications

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“…Hence, the liquid phase formation reported herein resulted in low-temperature sintering of zirconia. As sintering aids to densify the zirconia at low temperatures, Bi 2 O 3 [46,47] and Fe 2 O 3 [47][48][49][50][51] are reported; the melting of Bi 2 O 3 at 825ºC, in particular, achieved densification of zirconia at temperatures below 1000ºC [46]. The melting of Bi 2 O 3 caused liquid phase sintering, which induced grain slipping and rearrangement and accelerated the mass-transport and diffusion rates of zirconia through solutionprecipitation [46,47].…”

Section: Densification and Phase Changementioning

confidence: 99%

“…As sintering aids to densify the zirconia at low temperatures, Bi 2 O 3 [46,47] and Fe 2 O 3 [47][48][49][50][51] are reported; the melting of Bi 2 O 3 at 825ºC, in particular, achieved densification of zirconia at temperatures below 1000ºC [46]. The melting of Bi 2 O 3 caused liquid phase sintering, which induced grain slipping and rearrangement and accelerated the mass-transport and diffusion rates of zirconia through solutionprecipitation [46,47]. Meanwhile, Fe 2 O 3 caused not only liquid phase sintering but also formation of lattice defects in the zirconia crystals [47][48][49][50][51], thereby resulting in low-temperature sintering.…”

Section: Densification and Phase Changementioning

confidence: 99%

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Sintering behavior and mechanical properties of machinable zirconia/mica composites

Taruta

Yamaguchi

Yamakami

et al. 2019

Journal of Asian Ceramic Societies

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In order to fabricate machinable zirconia ceramics for dental restorations, zirconia/mica composites were prepared by mixing zirconia and fine mica powders, compacting the powder mixtures and then conducting pressure-less sintering of green powder compacts. The composites containing 30-49 vol% mica reached approximately full density at 1150ºC. The sintering temperature was 150ºC lower than that of monolithic zirconia. The mica melted during firing at above 1000ºC and recrystallized during cooling. The melting of mica at above 1000ºC induced rearrangement of the zirconia particles and accelerated mass-transport of zirconia through the solution-precipitation, resulting in low-temperature sintering of zirconia. Dense composites containing 30-36 vol% mica were machinable using a drill made of hard metal, while those containing 49 vol% mica were sufficiently machinable with a conventional high-speed steel tool. The machinable composite containing 30 vol% mica had a bending strength of 552 MPa and a fracture toughness of 3.9 MPa•m°5.

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Section: Densification and Phase Changementioning

confidence: 99%

Section: Densification and Phase Changementioning

confidence: 99%

Sintering behavior and mechanical properties of machinable zirconia/mica composites

Taruta

Yamaguchi

Yamakami

et al. 2019

Journal of Asian Ceramic Societies

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“…Consequently, the YSB addition within 1–5 wt%, as a sintering aid, is beneficial to remove pores and gas from YDC matrix and increase the relative density. However, the excessive addition of YSB up to 5–40 wt% leads to its remarkable volatilization, producing pores, and decreasing the relative density of the composite ceramics 14,15,28 …”

Section: Resultsmentioning

confidence: 99%

“…However, the excessive addition of YSB up to 5-40 wt% leads to its remarkable volatilization, producing pores, and decreasing the relative density of the composite ceramics. 14,15,28 Figure 4 shows the SEM morphologies and grain size distribution of YDC-xYSB (x = 0-40 wt%) sintered at 1100°C in air. All samples are composed of regular polygonal crystalline grains along with a small amount of pores.…”

Section: Microstructure and Densitymentioning

confidence: 99%

“…A great deal of relevant literature has reported that Bi 2 O 3 can be added into CeO 2 or ZrO 2 ‐based ceramics as a suitable sintering assistant to reduce sintering temperature by 200°C–500°C owing to its low melting point (~825°C) 10–13 . Han et al 14 added 3 mol% Bi 2 O 3 into 3 mol% Y 2 O 3 ‐stabilized ZrO 2 (3YSZ) as a sintering aid and the relative density could reach 96.5% after sintering at 1000°C for 1.5 h, meaning that the sintering temperature was lowered by 400°C–500°C. Gil et al 11 introduced a small amount of Bi 2 O 3 (≤2.0 wt%) into Ce 0.9 Gd 0.1 O 1.95 (GDC), and the relative density of GDC sintered at 1200°C–1400°C for 2–4 h could reach 98%–99.5%.…”

Section: Introductionmentioning

confidence: 99%

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Influences of Bi_0.75Y_0.25O_1.5 addition on the microstructure and ionic conductivity of Ce_0.8Y_0.2O_1.9 ceramics

Liang

Meng

et al. 2021

Int J Applied Ceramic Tech

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A second phase of Y 2 O 3 -stabilized Bi 2 O 3 (Bi 0.75 Y 0.25 O 1.5 ,YSB) is introduced into Y 2 O 3 -doped CeO 2 (Ce 0.8 Y 0.2 O 1.9 ,YDC) as a sintering additive and the composite ceramics of 5,10,20,30, 40 wt%) are prepared through sintering at 1100°C for 6 h in air atmosphere. The YDC-xYSB ceramics are composed of both YDC and YSB with cubic fluorite structure, and no other impurity phases are detected in XRD patterns. The relative density of YDC-xYSB rises firstly for x ≤5 wt%, and then it declines with YSB addition from 5 to 40 wt%. The average grain size of YDC decreases from 270 nm to 85.7 nm with YSB addition from 0 to 40 wt%. The YSB phase segregates at the grain boundaries of YDC based on the TEM analysis result.The ionic conductivity of YDC-xYSB (x ≥5 wt%) is lower than that of YDC in the test temperature of 200°C-500°C, while it gradually exceeds that of YDC in 500°C-750°C. At 750°C, the conductivity of YDC-30%YSB (6.22 × 10 −2 S/cm) is 1.35 times higher than that of YDC (4.6 × 10 −2 S/cm). The YSB addition can improve the ionic conductivity of YDC in 500°C-750°C and decrease its sintering temperature. K E Y W O R D S bismuth oxide, composite ceramics, ionic conductivity, sintering aid, Y 2 O 3 -doped CeO 2 How to cite this article: Liang W, Meng B, Xiao Q, et al. Influences of Bi 0.75 Y 0.25 O 1.5 addition on the microstructure and ionic conductivity of Ce 0.8 Y 0.2 O 1.9 ceramics.

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Sintering composite electrolytes of yttria-doped bismuth oxide and yttria-stabilized zirconia for solid oxide fuel cells

Xia,

Zhang,

Zhu

et al. 2024

J Solid State Electrochem

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Low-temperature sintering and microstructure evolution of Bi2O3-doped YSZ

Cited by 16 publications

References 33 publications

Sintering behavior and mechanical properties of machinable zirconia/mica composites

Sintering behavior and mechanical properties of machinable zirconia/mica composites

Influences of Bi_0.75Y_0.25O_1.5 addition on the microstructure and ionic conductivity of Ce_0.8Y_0.2O_1.9 ceramics

Sintering composite electrolytes of yttria-doped bismuth oxide and yttria-stabilized zirconia for solid oxide fuel cells

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Low-temperature sintering and microstructure evolution of Bi2O3-doped YSZ

Cited by 16 publications

References 33 publications

Sintering behavior and mechanical properties of machinable zirconia/mica composites

Sintering behavior and mechanical properties of machinable zirconia/mica composites

Influences of Bi0.75Y0.25O1.5 addition on the microstructure and ionic conductivity of Ce0.8Y0.2O1.9 ceramics

Sintering composite electrolytes of yttria-doped bismuth oxide and yttria-stabilized zirconia for solid oxide fuel cells

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Influences of Bi_0.75Y_0.25O_1.5 addition on the microstructure and ionic conductivity of Ce_0.8Y_0.2O_1.9 ceramics