N- ve P-tip Katkılı Mg2Si1-xSnx Katı alaşımlarının termal iletkenliklerinin teorik calışması

Övgü Ceyda Yelgel

doi:https://doi.org/10.16984/saufenbilder.292752

Makale detayları

N- ve P-tip Katkılı Mg2Si1-xSnx Katı alaşımlarının termal iletkenliklerinin teorik calışması

Yazarlar:

Övgü Ceyda Yelgel

Ana Başlıklar:

Fizik

Dergi:

Sakarya University Journal of Science 2017 Vol.21 Issue 6, pp.1221-1228

Belge Tipi:

Makale

Yayın Tarihi:

11/2017

Belge Dili:

Türkçe

Document ID (Org No.):

2000558021

DOI:

https://doi.org/10.16984/saufenbilder.292752

Özet:

 


Mg2Si1-xSnx
solid solutions are a promising class of thermoelectric materials due to
their high thermoelectric efficiencies at
intermediate temperature range from 500 K to 800 K. Present study presents a theoretical
work of the   thermal conductivities of both n- and
p-type doped Mg2Si1-xSnx solid solutions. The
thermal conductivity contributions arising from carriers (electrons or holes),
electron-hole pairs, and phonons are taken into account separately by employing
the Wiedemann-Franz law, Price's theory, and Debye's isotropic continuum model,
respectively. All phonon scattering mechanisms originate from crystal
boundaries, mass-defects, deformation potentials, and anharmonicity are
investigated rigorously for all solid solutions. The lowest total thermal
conductivity values are obtained as 2.431 WK-1m-1 at 700
K for n-type doped Mg2(Si0.4Sn0.6)0.98Bi0.02
solid solution and 1.843 WK-1m-1 at 600 K for
p-type doped Mg2(Si0.3Sn0.7)0.95Ga0.05
solid solution which clearly suggest that p-type doped Mg2Si1-xSnx
based solid solutions are better candidates for the thermoelectric
devices than their n-type doped solid solutions.


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Makale detayları

N- ve P-tip Katkılı Mg2Si1-xSnx Katı alaşımlarının termal iletkenliklerinin teorik calışması

Yazarlar: Övgü Ceyda Yelgel

Ana Başlıklar: Fizik

Dergi: Sakarya University Journal of Science 2017 Vol.21 Issue 6, pp.1221-1228

Belge Tipi: Makale

Yayın Tarihi: 11/2017

Belge Dili: Türkçe

Document ID (Org No.): 2000558021

DOI: https://doi.org/10.16984/saufenbilder.292752

Sayı

Yazarlar:

Övgü Ceyda Yelgel

Ana Başlıklar:

Fizik

Dergi:

Sakarya University Journal of Science 2017 Vol.21 Issue 6, pp.1221-1228

Belge Tipi:

Makale

Yayın Tarihi:

11/2017

Belge Dili:

Türkçe

Document ID (Org No.):

2000558021

DOI:

https://doi.org/10.16984/saufenbilder.292752