Simple apparatus to measure Seebeck coefficient up to 900K

Mishra, Amiyakanta; Bhattacharjee, Sudeep; Anwar, Shahid

doi:10.1016/j.measurement.2015.03.005

Cited by 19 publications

(11 citation statements)

References 26 publications

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“…5,6 Many groups have used these two conventional methods and designed the different apparatus. [7][8][9][10][11][12][13][14][15][16][17][18][19][20] In this conventional method accurate and simultaneous measurement of ∆T and ∆V poses many challenges. Using this method, design of the apparatus become more complex.…”

Section: Introductionmentioning

confidence: 99%

“…This method also gives more accurate value of α and have certain advantages over the conventional method used by others. [7][8][9][10][11][12][13][14][15][16][18][19][20] In spite of its simplicity, this method has been adopted by few people to fabricate the apparatus for Seebeck coefficient measurement, as this method is proposed in the recent past years. Here, we have adopted the method given by Boor et al, 21 and developed a simple and low cost apparatus to measure the thermopower in the temperature range 300-620 K. In our designed apparatus we have used two K-type thermocouples (TC) to measure the thermal voltages between the hot and cold end of the sample.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of a simple apparatus for the Seebeck coefficient measurement in high temperature region

Singh

Pandey

2017

Measurement

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A simple apparatus for the measurement of Seebeck coefficient (α) in the temperature range 300-620 K has been fabricated. Our design is appropriate for the characterization of samples with different geometries like disk and rod shaped. The sample holder assembly of the apparatus has been designed in such a way that, single heater used for sample heating purpose is enough to provide a self maintain temperature gradient across the sample. The value of α is obtained without explicit measurement of temperature gradient. The whole apparatus is fabricated from the materials, which are commonly available, so that any part can be replaced in case of any damage. In order to calibrate the instrument, we have carried out Seebeck coefficient measurement on nickel metal and LaCoO3 compound. The values of α obtained for nickel and LaCoO3 sample using the designed set-up are found to be equal to the values reported in the literature.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication of a simple apparatus for the Seebeck coefficient measurement in high temperature region

Singh

Pandey

2017

Measurement

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“…The Seebeck coefficient (S) can be obtained by applying a thermal gradient across a sample, measuring the differential voltage (ΔV) across two ends of that sample and having temperatures TH and TC at the respective ends [2]. This is under the condition that no current flows through the sample whilst measurements are being taken [3].…”

Section: Introductionmentioning

confidence: 99%

“…In order to measure S, two different methods can be utilized, the integral and differential method [3]. In the integral method, one end is kept at a constant temperature whereas the other end of the sample is slowly heated.…”

Section: Introductionmentioning

confidence: 99%

“…When following the differential method, the entire sample is heated to a higher temperature, with temperature differentials being created between the ends. The linear voltage drop (ΔV) versus the temperature difference (ΔT) gives the S for a specific temperature step [3]. This research paper follows the differential method, creating a testing environment in which the whole sample is slowly heated with ΔV measurements being taken with corresponding ΔT values, to estimate S. Materials which are thermal insulators and good electrical conductors with high S generally reflect good TE properties [4].…”

Section: Introductionmentioning

confidence: 99%

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Development of Flexible Thermoelectric Cells and Performance Investigation of Thermoelectric Materials for Power Generation

et al. 2017

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This paper presents experimental performance results for custom made thermoelectric generator. Two fabrication methods, powder compaction and painting over flexible substrate have been proposed and investigated. Experimental performance results have been presented for thermoelectric cells made from alloying Bismuth (Bi), Tellurium (Te) and Antimony (Sb). Powdered Ptype (Bi0.4Sb1.6Te3) and N-type (Bi2Te3) thermoelectric materials were chosen for the construction of the thermoelectric cell. Experimental results showed that P-type Bi0.4Sb1.6Te3 had Seebeck coefficient of 211.77 μV/°C and while N-type Bi2Te3 had a Seebeck coefficient of 109.09 μV/°C. The flexible thermoelectric generator has shown linear increase in open circuit voltage with increase in temperature difference across the cold and hot side.

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Enhancing the thermoelectric properties for hot-isostatic-pressed Bi2Te3 nano-powder using graphite nanoparticles

Mansour,

Nakamura,

AbdEl-Moneim

2024

J Mater Sci: Mater Electron

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Bismuth telluride (Bi2Te3) is a promising thermoelectric material produced commercially. However, its poor electrical conductivity and low figure of merit, caused by grain boundaries and high thermal conductivity, limit its effectiveness in powder metallurgy production. Herein, effects of adding Graphite nanoparticles (GTNPs) to Bi2Te3 on thermoelectric properties were studied. Three ratios of GTNPs (0.2, 0.35, 0.5 wt%) were added to ball-milled Bi2Te3 nano-powder. The hot isostatic pressing (HIP) sintering technique was employed to prepare the pristine Bi2Te3 and the BT-xGTNPs samples for testing. The crystallographic measurements showed a reduction in the crystallinity of the BT-xGTNPs samples compared to the pure Bi2Te3, whereas the electron microscopy measurements showed smaller grain sizes. This was also confirmed with an increase in the samples’ relative density implying the formation of nano-sized grains. Full electrical, thermal, and thermoelectric measurements were performed and comprehensively discussed in this report for all samples in the temperature range from room temperature (RT) to 570 K. The measurements demonstrated an enhancement for x = 0.35 wt% GTNPs at 540 K up to 43% in the power factor and 51% in the ZT compared to pristine Bi2Te3, which was attributed to the optimum grain size, the lower grain boundaries, and better electrical and thermal conductivity aroused from the precise addition of GTNPs. The best electrical conductivity of ~ 8.2 × 104 S/m and lowest thermal conductivity of ~ 1 W/m·K for the Bi2Te3-containing 0.35 wt% GTNPs at RT even though the sample with 0.5 wt% attained the highest Seebeck coefficient of 154 µV/T at 540 K.

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Simple apparatus to measure Seebeck coefficient up to 900K

Cited by 19 publications

References 26 publications

Fabrication of a simple apparatus for the Seebeck coefficient measurement in high temperature region

Fabrication of a simple apparatus for the Seebeck coefficient measurement in high temperature region

Development of Flexible Thermoelectric Cells and Performance Investigation of Thermoelectric Materials for Power Generation

Enhancing the thermoelectric properties for hot-isostatic-pressed Bi2Te3 nano-powder using graphite nanoparticles

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