Microstructure and thermoelectric properties of Zn1−xAlxO ceramics fabricated by spark plasma sintering

Ma, Ning; Li, J.-F.; Zhang, B.P.; Lin, Yuanhua; Ren, Lin; Chen, G.F.

doi:10.1016/j.jpcs.2010.06.006

Cited by 60 publications

(33 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is a nontoxic, low-cost, and earth-abundant material which is stable at a high temperature. These properties make it a promising candidate for n-type TE materials for energy harvesting in hightemperature applications [88][89][90] ), due to the high crystal quality resulting in a large Seebeck coefficient (~478 μV/K) [91]. Figure 6 presents the temperature-dependent PF of ZnObased TE materials.…”

Section: Zno-basedmentioning

confidence: 99%

Metal oxides for thermoelectric power generation and beyond

Feng

Jiang

Ghafari

et al. 2017

Adv Compos Hybrid Mater

116

View full text Add to dashboard Cite

Metal oxides are widely used in many applications such as thermoelectric, solar cells, sensors, transistors, and optoelectronic devices due to their outstanding mechanical, chemical, electrical, and optical properties. For instance, their high Seebeck coefficient, high thermal stability, and earth abundancy make them suitable for thermoelectric power generation, particularly at a high-temperature regime. In this article, we review the recent advances of developing high electrical properties of metal oxides and their applications in thermoelectric, solar cells, sensors, and other optoelectronic devices. The materials examined include both narrow-band-gap (e.g., Na x CoO 2 , Ca 3 Co 4 O 9 , BiCuSeO, CaMnO 3 , SrTiO 3 ) and wide-band-gap materials (e.g., ZnO-based, SnO 2 -based, In 2 O 3 -based). Unlike previous review articles, the focus of this study is on identifying an effective doping mechanism of different metal oxides to reach a high power factor. Effective dopants and doping strategies to achieve high carrier concentration and high electrical conductivities are highlighted in this review to enable the advanced applications of metal oxides in thermoelectric power generation and beyond.

show abstract

Section: Zno-basedmentioning

confidence: 99%

Metal oxides for thermoelectric power generation and beyond

Feng

Jiang

Ghafari

et al. 2017

Adv Compos Hybrid Mater

116

View full text Add to dashboard Cite

show abstract

“…The observed absolute values of Seebeck coefficient are somewhat low compared to reported values for bulk samples 18 but correspond well to those reported for thin films. 19 The reflectivity spectra for the Al-doped ZnO films are shown in Fig. 5.…”

Section: B Physical Propertiesmentioning

confidence: 99%

Atomic layer deposition of Al-doped ZnO thin films

Tynell

Yamauchi

Karppinen

et al. 2012

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

View full text Add to dashboard Cite

Articles you may be interested inAtomic layer deposition has been used to fabricate thin films of aluminum-doped ZnO by depositing interspersed layers of ZnO and Al 2 O 3 on borosilicate glass substrates. The growth characteristics of the films have been investigated through x-ray diffraction, x-ray reflection, and x-ray fluorescence measurements, and the efficacy of the Al doping has been evaluated through optical reflectivity and Seebeck coefficient measurements. The Al doping is found to affect the carrier density of ZnO up to a nominal Al dopant content of 5 at. %. At nominal Al doping levels of 10 at. % and higher, the structure of the films is found to be strongly affected by the Al 2 O 3 phase and no further carrier doping of ZnO is observed.

show abstract

“…Instead of using an external heat source, pulsed current passes through the electrically conducting pressure dyes, thereby generating the sintering temperature [21][22][23]. SPS has been used to generate dense ceramics with minimum grain growth [19] for many applications [23], including electroceramics [24,25], composites [26,27], bioceramics [28], thermoelectric materials [29], and transparent polycrystalline alumina (PCA) [30]. Only a few publications present SPS sintering of ZnO nanopowders, even though there is great potential in this technique.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Sintering of ZnO Nanopowders

et al. 2017

View full text Add to dashboard Cite

Nanopowders are continuously under investigation as they open new perspectives in numerous fields. There are two main challenges to stimulating their development: sufficient low-cost, high throughput synthesis methods which lead to a production with well-defined and reproducible properties; and for ceramics specifically, the conservation of the powders' nanostructure after sintering. In this context, this paper presents the synthesis of a pure nanosized powder of ZnO (dv 50~6 0 nm, easily redispersable) by using a continuous Segmented Flow Tubular Reactor (SFTR), which has previously shown its versatility and its robustness, ensuring a high powder quality and reproducibility over time. A higher scale of production can be achieved based on a "scale-out" concept by replicating the tubular reactors. The sinterability of ZnO nanopowders synthesized by the SFTR was studied, by natural sintering at 900 • C and 1100 • C, and Spark Plasma Sintering (SPS) at 900 • C. The performance of the synthesized nanopowder was compared to a commercial ZnO nanopowder of high quality. The samples obtained from the synthesized nanopowder could not be densified at low temperature by traditional sintering, whereas SPS led to a fully dense material after only 5 min at 900 • C, while also limiting the grain growth, thus leading to a nanostructured material.

show abstract

Microstructure and thermoelectric properties of Zn1−xAlxO ceramics fabricated by spark plasma sintering

Cited by 60 publications

References 21 publications

Metal oxides for thermoelectric power generation and beyond

Metal oxides for thermoelectric power generation and beyond

Atomic layer deposition of Al-doped ZnO thin films

Synthesis and Sintering of ZnO Nanopowders

Contact Info

Product

Resources

About