Spark Plasma Sintering and Densification Mechanisms of Antimony-Doped Tin Oxide Nanoceramics

Densification of antimony-doped tin oxide (ATO) ceramics without sintering aids is very difficult, due to the volatilization of SnO2, formation of deleterious phases above 1000°C, and poor sintering ability of ATO particles. In this paper, monodispersed ATO nanoparticles were synthesized via sol-gel method, and then ATO nanoceramics with high density were prepared by spark plasma sintering (SPS) technology using the as-synthesized ATO nanoparticles without the addition of sintering aids. The effect of Sb doping content on the densification was investigated, and the densification mechanisms were explored. The results suggest that ATO nanoparticles derived from sol-gel method show good crystallinity with a crystal size of 5–20 nm and Sb is incorporated into the SnO2crystal structure. When the SPS sintering temperature is 1000°C and the Sb doping content is 5 at.%, the density of ATO nanoceramics reaches a maximum value of 99.2%. Densification mechanisms are explored in detail.

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Highly translucent and strong ZrO2-SiO2 nanocrystalline glass ceramic prepared by sol-gel method and spark plasma sintering with fine 3D microstructure for dental restoration

Journal of the European Ceramic Society ◽

10.1016/j.jeurceramsoc.2017.05.039 ◽

2017 ◽

Vol 37 (13) ◽

pp. 4067-4081 ◽

Cited By ~ 16

Author(s):

Le Fu ◽

Håkan Engqvist ◽

Wei Xia

Keyword(s):

Spark Plasma Sintering ◽

Glass Ceramic ◽

Sol Gel ◽

Dental Restoration ◽

Gel Method ◽

Sol Gel Method ◽

3D Microstructure ◽

Plasma Sintering ◽

Spark Plasma

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Effect of Co-Doping on Thermoelectric Properties of n-Type Bi2Te3 Nanostructures Fabricated Using a Low-Temperature Sol-Gel Method

Nanomaterials ◽

10.3390/nano11102719 ◽

2021 ◽

Vol 11 (10) ◽

pp. 2719

Author(s):

Syed Irfan ◽

Muhammad Aizaz Ud Din ◽

Muhammad Qaisar Manzoor ◽

Deliang Chen

Keyword(s):

Low Temperature ◽

Seebeck Coefficient ◽

Spark Plasma Sintering ◽

Thermoelectric Properties ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method ◽

Plasma Sintering ◽

Spark Plasma ◽

Co Doped

In this work, a novel low-temperature double solvent sol-gel method was used to fabricate (Sm, Ce, Gd) and (Sn, Se, I) co-doped at Bi and Te-sites, respectively, for Bi2Te3 nanostructures. The phase-purity and high crystallinity of as-synthesized nanostructures were confirmed using X-ray diffraction and high-resolution transmission electron microscopy. The nanopowders were hot-pressed by spark plasma sintering into bulk pellets for thermoelectric properties. The spark plasma sintering temperature significantly affects the Seebeck coefficient and electrical conductivity of bulk Bi2Te3 pellets. The electrical conductivities of co-doped samples decrease with an increase in the temperature, but conversely, the Seebeck coefficient is linearly increasing. The power factor showed that the co-dopants enhanced the thermoelectric properties of Bi2Te3 nanopowders.

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Comparative Study of Magnetocaloric Effect in La0.67Ca0.20Sr0.13MnO3 Manganite Prepared by Sol-Gel Method and Spark Plasma Sintering

Journal of Superconductivity and Novel Magnetism ◽

10.1007/s10948-018-4782-9 ◽

2018 ◽

Vol 32 (4) ◽

pp. 993-999 ◽

Cited By ~ 1

Author(s):

Z. R. Zhao ◽

T. Jing ◽

G. F. Wang ◽

Y. F. Li ◽

Q. Ma ◽

...

Keyword(s):

Comparative Study ◽

Magnetocaloric Effect ◽

Spark Plasma Sintering ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method ◽

Plasma Sintering ◽

Spark Plasma

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The Effect of Sb Content on Spark Plasma Sintered High-Density Antimony-Doped Tin Oxide Ceramics

Materials Science Forum ◽

10.4028/www.scientific.net/msf.687.204 ◽

2011 ◽

Vol 687 ◽

pp. 204-208 ◽

Cited By ~ 2

Author(s):

Qi Zhong Li ◽

Dong Ming Zhang ◽

Guo Qiang Luo ◽

Cheng Zhang Li ◽

Qiang Shen ◽

...

Keyword(s):

Spark Plasma Sintering ◽

Tin Oxide ◽

Sintering Temperature ◽

Glass Melting ◽

High Density ◽

Oxide Ceramics ◽

Sintering Aids ◽

Maximum Value ◽

Plasma Sintering ◽

Spark Plasma

Spark plasma sintering (SPS) is a newly developed technique that enables poorly sinterable tin oxide powder to be fully densified. Sintering without sintering aids is of great importance when SnO2ceramics are used as electrodes in the glass melting industry and aluminum electrometallurgy. Dense and good-conductive Antimony-doped SnO2 ceramics can be achieved by SPS at a lower sintering temperature and in a shorter time. When the Sb2O3concentration is 1.0 mol%, the densities of the samples reach their maximum value, which is 98.2% of the theoretical value. When the content of Sb2O3was 2.44mol%, SnO2ceramics with densities 97.6% can be obtained at 800°C-1000°C, and the resistivity was about 5.19×10-2Ω.cm at the sintering temperature of 1000°C. Defined amount of Sb3+used in our research are beneficial to low the sintering temperature and promote the densification of SnO2ceramics

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Densification of ATO Nanoceramics by Spark Plasma Sintering

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.508.230 ◽

2012 ◽

Vol 508 ◽

pp. 230-234

Author(s):

Xue Ping Li ◽

Fei Chen ◽

Qiang Shen ◽

An Xue Wang ◽

Lian Meng Zhang

Keyword(s):

Relative Density ◽

Spark Plasma Sintering ◽

Tin Oxide ◽

Content Increase ◽

Doping Content ◽

High Quality ◽

Densification Temperature ◽

Plasma Sintering ◽

Spark Plasma ◽

Ceramic Targets

High Density Antimony-Doped Tin Oxide (ATO) Ceramic Targets Are the Crucial Materials for Preparation of High Quality Transparent Conductive ATO Thin Films in Sputtering Process. In the Present Work, ATO Nanopowders with Different Sb2O3 Doping Content (0~10 mol%) Were Used to Fabricate the ATO Nanoceramics by Spark Plasma Sintering (SPS) Technique, which Can Reduce the Densification Temperature and Restrain a Grain Growth. And the Effect of Sb2O3 Doping Content (0~10 mol%) on the Density and Microstructure Had Been Investigated. the Results Showed that with the Sb2o3 Doping Content Increase, the Relative Density of ATO Nanoceramics Is Increased and the Resistivity Is Decreased. When the Sb2O3 Doping Content Is 10 mol%, the Relative Density Is 97.2% and the Resistivity Is 7.9×10-2 Ω•cm.

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