Sintering behavior and thermoelectric properties of LaCoO3 ceramics with Bi2O3–B2O3–SiO2 as a sintering aid

RSC Advances ◽  
2014 ◽  
Vol 4 (94) ◽  
pp. 51995-52000 ◽  
Author(s):  
Jiao Han ◽  
Ying Song ◽  
Xue Liu ◽  
Fuping Wang
Keyword(s):  
Thermoelectric Properties ◽  
Sintering Temperature ◽  
Low Cost ◽  
Thermoelectric Performance ◽  
Sintering Behavior ◽  
Sintering Aid

Bi2O3–B2O3–SiO2 could remarkably reduce the sintering temperature of LaCoO3 ceramics to 950 oC, providing a low cost and facile approach to improve the sinterability and thermoelectric performance of oxides.

Optimum sintering temperature for thermoelectric properties of low-cost CuAl0.90Fe0.10O2 material

2016 ◽  
Vol 27 (10) ◽  
pp. 11102-11109 ◽  
Author(s):  
Vilailuck Siriwongrungson ◽  
Aparporn Sakulkalavek ◽  
Rachsak Sakdanuphab
Keyword(s):  
Thermoelectric Properties ◽  
Sintering Temperature ◽  
Low Cost

Sintering of MoSi2

1993 ◽  
Vol 322 ◽  
Author(s):  
J.J. Petrovic ◽  
J.S. Idasetima
Keyword(s):  
Sintered Density ◽  
Sintering Temperature ◽  
Low Cost ◽  
Argon Atmosphere ◽  
Fabrication Process ◽  
Sintering Behavior ◽  
Sintering Atmosphere ◽  
Fundamental Nature ◽  
Sintering Time ◽  
Cold Pressed

AbstractDespite the fundamental nature of sintering and its importance as a low cost fabrication process, little information exists on the sintering behavior of the structural silicide Mosi2. The sintering of commercial Mosi2 powders in the range of 1-10 μm was investigated as a function of sintering temperature, sintering time, and sintering atmosphere. Initial densities for uniaxially cold pressed powders were in the range of 47-56% theoretical. A maximum sintered density of 90% of theoretical was achieved for 1 μm Mosi2 powders after sintering for 100 hours at 1600 °C in an argon atmosphere. Larger 10 μm Mosi2 powders achieved lower sintered densities under these conditions. Avenues to optimize the sintering behavior of Mosi2 are suggested.

Influence of Powder Characteristics on Sintering of AlN Ceramics

2007 ◽  
Vol 280-283 ◽  
pp. 1409-1412 ◽  
Author(s):  
Jin Yu Qiu ◽  
Koji Watari ◽  
Yuji Hotta ◽  
Kenshi Mitsuishi
Keyword(s):  
Final Stage ◽  
Sintering Temperature ◽  
Sintering Behavior ◽  
Particle Sizes ◽  
Sintering Aid ◽  
Surface Areas ◽  
Initial Stage ◽  
Primary Particles ◽  
Powder Characteristics ◽  
Specific Surface Areas

The sintering behavior of AlN powders with different particle sizes and specific surface areas was investigated in the present work. 4.5-8.0mass% of the as-synthesized sintering aid from the Li2O-Y2O3-CaO system was added to these AlN powders, and they were then fired at 1400-1650oC for 6h. At the initial stage of sintering the fine AlN powder, it was recognized that sintering of primary particles occurred in agglomerations. With an increase of firing temperature, particles were rearranged and grains grew rapidly at the final stage. On contrary, in sintering of samples using the coarse AlN powder, the densification increased with raising sintering temperatures slowly, and the sintering temperature higher than 1650oC was required to obtain densified specimens.

Low-Temperature Sintering of ZnO–TiO2 Ceramics

2015 ◽  
Vol 137 (3) ◽  
Author(s):  
Zhengwei Nie ◽  
Yuyi Lin ◽  
Feixue Wang
Keyword(s):  
Low Temperature ◽  
Vanadium Pentoxide ◽  
Material Properties ◽  
Sintering Temperature ◽  
Theoretical Density ◽  
Sintering Behavior ◽  
Low Temperature Sintering ◽  
Sintering Aid

Vanadium pentoxide (V2O5) was chosen as a sintering aid to lower the sintering temperature of the ZnO–TiO2 system. The effect of V2O5 on the sintering behavior and material properties of ZnO–TiO2 ceramics and cermets made of ZnO–TiO2 ceramics and copper (Cu) was investigated as a function of V2O5 percentage and sintering temperature. Densities and hardness of the specimens were improved with an increase of V2O5 up to 2 wt. %. The sintering temperature of the specimens can be reduced to below 1000 °C. The properties of ZnO–TiO2 ceramics and cermets made from ZnO–TiO2 ceramics and Cu with V2O5 are strongly dependent on the sintering temperature. The density of ZnO–TiO2 ceramics and cermets was increased up to 95%, 90% of theoretical density at 900–920 °C, 960–1000 °C, respectively, for 4 hrs.

Sintering Behavior and Dielectric Properties of BZN Ceramics Coated by Precursor Solution of CuSO4

2012 ◽  
Vol 476-478 ◽  
pp. 1058-1061
Author(s):  
Qian Li ◽  
Biao Jin ◽  
Jin Liang Huang ◽  
Yong Jun Gu ◽  
Li Hua Li ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Ceramic Composite ◽  
Sintering Temperature ◽  
Negative Impact ◽  
Precursor Solution ◽  
Sintering Behavior ◽  
Coating Technology ◽  
Sintering Aid ◽  
Phase Structures ◽  
Ceramic Samples

(Bi1.5Zn0.5)(Zn0.5Nb1.5)O7 (BZN) ceramic samples were prepared by solid state reaction, In order to reduce the sintering temperature of BZN ceramic we have used liquid coating technology to dope CuO by precursor solution of CuSO4. The sintering behavior, microstructures, phase structures, and dielectric properties were studied. The process reduces the amount of sintering aid and minimized the negative impact of sintering aid on dielectric properties. A ceramic composite which could be sintered well at 900°C and showed good dielectric properties of εr=161,tanδ=0.005 and TCF=-398ppm/°C（1MHz）was obtained when 0.5mol/l CuSO4 was added to the (Bi1.5Zn0.5)(Zn0.5Nb1.5)O7 ceramic.

Influence of Addition of Alumina Nanoparticles on Thermoelectric Properties of Higher Manganese Silicide

2012 ◽  
Vol 1490 ◽  
pp. 127-132 ◽  
Author(s):  
Takashi Itoh ◽  
Naoki Ono
Keyword(s):  
Thermal Conductivity ◽  
Grain Boundary ◽  
Thermoelectric Properties ◽  
Lattice Thermal Conductivity ◽  
Waste Heat ◽  
Low Cost ◽  
Thermoelectric Performance ◽  
Alumina Nanoparticles ◽  
Higher Manganese Silicide ◽  
Manganese Silicide

ABSTRACTHigher manganese silicide (HMS) is a low-cost and eco-friendly thermoelectric material available for recovering waste heat of 500 to 900 K. In this research, we tried to uniformly disperse the alumina nanoparticles (ANPs) in the HMS matrix to reduce the thermal conductivity and to improve the thermoelectric performance. Influence of addition of ANPs on the thermoelectric properties was investigated. It was confirmed that ANPs were uniformly dispersed in the HMS grain boundary. The lattice thermal conductivity was reduced by adding ANPs. As a result, the maximum thermoelectric performance of ZT=0.58 was achieved at about 800 K by adding 1 vol% of ANPs. The performance of ANPs-added HMS was improved about 25 %.

scholarly journals Microstructure and Thermoelectric Properties of (Bi0.48Sb1.52)Te3 Thick Films Prepared with Tape Casting Method

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 140
Author(s):  
Lichen Liu ◽  
Ziping Cao ◽  
Min Chen ◽  
Jun Jiang
Keyword(s):  
Thermoelectric Properties ◽  
Low Cost ◽  
Thick Films ◽  
Tape Casting ◽  
Casting Process ◽  
Casting Method ◽  
Glass Substrates ◽  
Conductive Films ◽  
Casting Technology

This paper reports the fabrication and characterization of (Bi0.48Sb1.52)Te3 thick films using a tape casting process on glass substrates. A slurry of thermoelectric (Bi0.48Sb1.52)Te3 was developed and cured thick films were annealed in a vacuum chamber at 500–600 °C. The microstructure of these films was analyzed, and the Seebeck coefficient and electric conductivity were tested. It was found that the subsequent annealing process must be carefully designed to achieve good thermoelectric properties of these samples. Conductive films were obtained after annealing and led to acceptable thermoelectric performance. While the properties of these initial materials are not at the level of bulk materials, this work demonstrates that the low-cost tape casting technology is promising for fabricating thermoelectric modules for energy conversion.

scholarly journals Thermoelectric Performance of Mechanically Mixed BixSb2-xTe3—ABS Composites

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1706
Author(s):  
Zacharias Viskadourakis ◽  
Argiri Drymiskianaki ◽  
Vassilis M. Papadakis ◽  
Ioanna Ioannou ◽  
Theodora Kyratsi ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Large Scale ◽  
Low Cost ◽  
Acrylonitrile Butadiene Styrene ◽  
Thermoelectric Performance ◽  
Scale Production ◽  
Bismuth Antimony Telluride ◽  
Mechanical Mixing ◽  
Large Scale Production ◽  
Bi Doping

In the current study, polymer-based composites, consisting of Acrylonitrile Butadiene Styrene (ABS) and Bismuth Antimony Telluride (BixSb2−xTe3), were produced using mechanical mixing and hot pressing. These composites were investigated regarding their electrical resistivity and Seebeck coefficient, with respect to Bi doping and BixSb2-xTe3 loading into the composite. Experimental results showed that their thermoelectric performance is comparable—or even superior, in some cases—to reported thermoelectric polymer composites that have been produced using other complex techniques. Consequently, mechanically mixed polymer-based thermoelectric materials could be an efficient method for low-cost and large-scale production of polymer composites for potential thermoelectric applications.

scholarly journals Direct measurement of the thermoelectric properties of electrochemically deposited Bi2Te3 thin films

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jose Recatala-Gomez ◽  
Pawan Kumar ◽  
Ady Suwardi ◽  
Anas Abutaha ◽  
Iris Nandhakumar ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermoelectric Properties ◽  
Bismuth Telluride ◽  
Indium Tin Oxide ◽  
Seed Layer ◽  
Room Temperature ◽  
Low Cost ◽  
Temperature Dependent ◽  
Temperature Heat ◽  
Electrochemically Deposited

Abstract The best known thermoelectric material for near room temperature heat-to-electricity conversion is bismuth telluride. Amongst the possible fabrication techniques, electrodeposition has attracted attention due to its simplicity and low cost. However, the measurement of the thermoelectric properties of electrodeposited films is challenging because of the conducting seed layer underneath the film. Here, we develop a method to directly measure the thermoelectric properties of electrodeposited bismuth telluride thin films, grown on indium tin oxide. Using this technique, the temperature dependent thermoelectric properties (Seebeck coefficient and electrical conductivity) of electrodeposited thin films have been measured down to 100 K. A parallel resistor model is employed to discern the signal of the film from the signal of the seed layer and the data are carefully analysed and contextualized with literature. Our analysis demonstrates that the thermoelectric properties of electrodeposited films can be accurately evaluated without inflicting any damage to the films.

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