Rahel, Amelthia (2017) Pengaruh Temperatur Sintering Terhadap sifat Listrik Dan Termal Zn1-xAlxO Sebagai Kandidat Material Termoelektrik. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Termoelektrik merupakan sebuah perangkat yang dapat digunakan untuk mengonversikan energi panas sisa menjadi listrik. Sifat listrik dan termal material penyusun sangat menentukan efisiensi termoelektrik. Material oksida logam seperti oksida seng (ZnO) sangat stabil pada rentang temperatur yang besar, tidak beracun, biaya murah dan ramah lingkungan, berpotensi menjadi material termoelektrik pada temperatur tinggi. Dalam penelitian ini, penulis mensintesis Zn0.98Al0.02O dengan metode kopresipitasi serbuk ZnO dan Al2O3, serta menganalisis pengaruh temperatur sintering (700, 800, 900, 950oC) terhadap sifat listrik dan termal material. Hasil eksperimen diuji dengan XRD dan SEM-EDX untuk melihat fasa, morfologi, persebaran unsur pada sampel, LCR meter untuk mengetahui sifat listrik, dan TGA untuk menganalisis sifat termal material. Dari hasil pengujian diketahui bahwa Al3+ berhasil didoping ke dalam kisi ZnO dan meningkatkan konduktivitas listrik. Material Zn0.98Al0.02O yang disintering pada temperatur 900oC memiliki nilai konduktivitas paling tinggi (4.53x10-4 S/m) dan stabil jika beroperasi pada temperatur tinggi, sehingga dapat menjadi salah satu kandidat material termoelektrik pada temperatur tinggi.
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Thermoelectric is a device that converts waste heat to electricity.
The efficiency of thermoelectric is determined by its thermal and
electrical properties. Metal oxide material, such as zinc oxide
(ZnO) is stable in air at elevated temperatures, non-toxic, low-cost,
and environmentally friendly, which makes it a potential candidate
for thermoelectric application. In this research, the author
investigated the effect of sintering temperature (700, 800, 900,
950oC) on electrical and thermal properties of Zn0.98Al0.02O which
has been synthesized using co-precipitation method from ZnO and
Al2O3 powder. The powders were characterized using XRD and
SEM-EDX to observe its phase, morphology, and distribution of
elements, using LCR meter to observe electrical properties and
TGA to analyze thermal properties of material. As dopant, Al3+ is
successfully entered ZnO lattice and increased its electrical
conductivity. The highest value of electrical conductivity (4.53x10-
4 S/m) is obtained by Zn0.98Al0.02O which sintered at 900oC. This
material is stable when operated at elevated temperature, therefore
this material can be a candidate for thermoelectric application.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Termoelektrik, ZnO, Al2O3, Kopresipitasi, Sintering |
| Subjects: | T Technology > TP Chemical technology > TP248 Nanogels. Nanoparticles. T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial. |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | AMELTHIA RAHEL |
| Date Deposited: | 02 Mar 2017 04:34 |
| Last Modified: | 05 Mar 2019 03:59 |
| URI: | http://repository.its.ac.id/id/eprint/1741 |
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