Investigation of the Effect of NiO Nanoparticles on the Transport Properties of Zr&lt;SUB&gt;0.5&lt;/SUB&gt;Hf&lt;SUB&gt;0.5&lt;/SUB&gt;Ni&lt;SUB&gt;1–&lt;I&gt;x&lt;/I&gt;&lt;/SUB&gt;Pd&lt;SUB&gt;&lt;I&gt;x&lt;/I&gt;&lt;/SUB&gt;Sn&lt;SUB&gt;0.99&lt;/SUB&gt;Sb&lt;SUB&gt;0.01&lt;/SUB&gt; (&lt;I&gt;x&lt;/I&gt; = 0 and 0.2)

Yaqub, Rumana; Sahoo, Pranti; Makongo, Julien P. A.; Takas, Nathan J.; Poudeu, Pierre F. P.; Stokes, Kevin L.

doi:10.1166/sam.2011.1193

Cited by 10 publications

(5 citation statements)

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“…For the two kinds of nanocomposites, there are also several different preparation methods for each of them. For example, nanoinclusions in a micro-scale HH matrix can be prepared by in-situ formation [79,80,106] as well as ex-situ mixing [71,77,78,107,108,109,110], and the nano-scale HH phase can be obtained by either ball milling [53,67,72,73,111] or melt spinning [74,112,113]. It is not our intent (which would be quite daunting) to cover all the possible preparation methods for HH nanocomposites in this article.…”

Section: Nanostructuring Enhances Zt Of Hh Nanocompositesmentioning

confidence: 99%

“…Usually some commercial nanoparticles (or other nanomaterials) with very uniform size distributions are available, and one can then purchase the uniform nanoparticles and subsequently mix the nanoparticles with HH matrix compound by ball milling in order to form nanocomposites. γ-Al 2 O 3 [78], ZrO 2 [77,108,110], C 60 [109], WO 3 [107], and NiO [71] nanoscale secondary phases are chosen as nanoinclusions in the HH matrix, and the effects of the nanoinclusions on the electrical and thermal transport properties of HH compounds have been systemically investigated.…”

Section: Nanostructuring Enhances Zt Of Hh Nanocompositesmentioning

confidence: 99%

“…Many different HH nanocomposites were investigated in the past with regards to improving their TE properties, and the details will be reviewed in section 3. Implementation of the nanostructuring process in HH compounds has indeed led to enhancement of ZT, which is due to the significant reduction of the lattice thermal conductivity in most cases [69][70][71][72][73][74][75][76][77][78], and also a substantial improvement of the power factor [79,80].…”

Section: Structure Of Hh Compounds and Typical Strategies Of Enhancin...mentioning

confidence: 99%

“…Indeed, the nanostructuring approach significantly enhances the ZT values of HH nanocomposites by significantly reducing the lattice thermal conductivity [69,70,71,72,73,74,75,76,77,78]. However, more recently, it is reported that, in addition to the reduction in the lattice thermal conductivity, nanostructuring can also increase the power factor, PF , in some HH nanocomposites [79,80].…”

Section: Introductionmentioning

confidence: 99%

“…Over the past several years, one successful strategy that has been used to decrease the thermal conductivity in several TE materials is that of nanostructuring or introducing nano-scale secondary phases into the host matrix to form nanocomposites. Indeed, the nanostructuring approach significantly enhances the ZT values of HH nanocomposites by significantly reducing the lattice thermal conductivity [69][70][71][72][73][74][75][76][77][78]. However, more recently, it is reported that, in addition to the reduction in the lattice thermal conductivity, nanostructuring can also increase the power factor, PF, in some HH nanocomposites [79,80].…”

Section: Introductionmentioning

confidence: 99%

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Recent Advances in Nanostructured Thermoelectric Half-Heusler Compounds

et al. 2012

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Half-Heusler (HH) alloys have attracted considerable interest as promising thermoelectric (TE) materials in the temperature range around 700 K and above, which is close to the temperature range of most industrial waste heat sources. The past few years have seen nanostructuing play an important role in significantly enhancing the TE performance of several HH alloys. In this article, we briefly review the recent progress and advances in these HH nanocomposites. We begin by presenting the structure of HH alloys and the different strategies that have been utilized for improving the TE properties of HH alloys. Next, we review the details of HH nanocomposites as obtained by different techniques. Finally, the review closes by highlighting several promising strategies for further research directions in these very promising TE materials.

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Section: Nanostructuring Enhances Zt Of Hh Nanocompositesmentioning

confidence: 99%

Section: Nanostructuring Enhances Zt Of Hh Nanocompositesmentioning

confidence: 99%

Section: Structure Of Hh Compounds and Typical Strategies Of Enhancin...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recent Advances in Nanostructured Thermoelectric Half-Heusler Compounds

et al. 2012

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High Efficiency Half‐Heusler Thermoelectric Materials for Energy Harvesting

Zhu

Xie

et al. 2015

Advanced Energy Materials

423

261

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respectively the temperature of the hot side and cold side, Δ T = T H -T C and T avg are the temperature gradient and average between hot and cold sides. [ 4 ] The fi gure of merit zT is defi ned as zT = α 2 σT /( κ e + κ L ), where α , σ , T , κ e and κ L are respectively the Seebeck coeffi cient, the electrical conductivity, the absolute temperature, and the electrical and lattice components of total thermal conductivity κ . [ 2 ] High conversion effi ciency of 15%-20% is thought of as the "Holy Grail" for large scale application of TE technologies. [ 5 ] As depicted in Figure 1 , this conversion efficiency can be realized by using middle temperature (500-900 K) TE materials with very high zT or high temperature (>900 K) TE materials with compromised zT . Recently, much progress has been made in developing high effi ciency middle temperature TE materials: high zT 's of ≈1.5 at 750 K for n-type and ≈2.0 at for p-type have been achieved in PbTe-based alloys, [6][7][8][9] while n-type and p-type fi lled skutterudites have the maximum zT 's of ≈1.7 and ≈1.0, respectively, near 800 K. [ 10,11 ] Some other TE materials made of earth-abundant and non-toxic elements have also been identifi ed, such as single crystal SnSe ( zT ≈ 2.6 at 923 K), [ 12 ] silicides [ 13,14 ] and α -MgAgSb. [ 15 ] However, there remain tremendous challenges for most of these TE materials for large scale commercial application, mainly due to their relatively poor thermal stability and weak mechanical strength at high temperatures. In Half-Heusler (HH) compounds have gained ever-increasing popularity as promising high temperature thermoelectric materials. High fi gure of merit zT of ≈1.0 above 1000 K has recently been realized for both n-type and p-type HH compounds, demonstrating the realistic prospect of these high temperature compounds for high effi ciency power generation. Here, recent progress in advanced fabrication techniques and the intrinsic atomic disorders in HH compounds, which are linked to the understanding of the electrical transport, is discussed. Thermoelectric transport features of n-type ZrNiSn-based HH alloys are particularly emphasized, which is benefi cial to further improving thermoelectric performance and comprehensively understanding the underlying mechanisms in HH thermoelectric materials. The rational design and realization of new high performance p-type Fe(V,Nb)Sb-based HH compounds are also demonstrated. The outlook for future research directions of HH thermoelectric materials is also discussed.

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Half-Heusler Thermoelectrics

Zhu

Chen

2019

Novel Thermoelectric Materials and Device Design Concepts

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Investigation of the Effect of NiO Nanoparticles on the Transport Properties of Zr<SUB>0.5</SUB>Hf<SUB>0.5</SUB>Ni<SUB>1–<I>x</I></SUB>Pd<SUB><I>x</I></SUB>Sn<SUB>0.99</SUB>Sb<SUB>0.01</SUB> (<I>x</I> = 0 and 0.2)

Cited by 10 publications

References 0 publications

Recent Advances in Nanostructured Thermoelectric Half-Heusler Compounds

Recent Advances in Nanostructured Thermoelectric Half-Heusler Compounds

High Efficiency Half‐Heusler Thermoelectric Materials for Energy Harvesting

Half-Heusler Thermoelectrics

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