Ruttanapun, Chesta
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Preferred name
Ruttanapun, Chesta
Alternative Name
Ruttanapun, C.
Main Affiliation
Email
chesta.ru@kmitl.ac.th
43 results
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Item type:Publication, P-Type optoelectronic and transparent conducting oxide properties of delafossite CuAl1/2Fe1/2O2(2015-12-03); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, High temperature electrical and thermal properties of activated bamboo charcoal/C12A7 mayenite composite prepared by carbon diffusion process(2019-03-15); Activated carbon from bamboo charcoal (BC) was diffused into the C12A7 mayenite compound via carbon diffusion process for synthesizing BC and C12A7 composite (BC/C12A7 composite). The BC/C12A7 composite was fabricated by carbon diffusion at holding time 5, 10 and 20 h for investigating electrical and thermal properties at high temperature. Result of XRD revealed the C12A7 structure and confirmed by Raman spectrum. Obtained energy gap showed at 4.93, 5.26, 5.19 and 5.09 eV at holding times of 0, 5, 10 and 20 h, respectively. Electrical conductivity significantly increased with increasing temperature and increased as a function of increasing holding time. Carrier concentration showed approximately 1.27 × 10 <sup>17</sup> , 1.32 × 10 <sup>17</sup> and 2.76 × 10 <sup>17</sup> cm <sup>−3</sup> of 5, 10 and 20 h, respectively. Temperature dependence of thermal conductivity showed as proportion of T <sup>−1</sup> due to phonon-phonon scattering of Umklapp process. The thermal conductivity decreased from pristine C12A7 approximately 0.4 W m <sup>−1</sup> K <sup>−1</sup> in all BC/C12A7 composite samples. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Synthesis of Zn0.96Al0.04O thermoelectric material for fabrication of thermoelectric module and thermoelectric generator(2018-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Reinvestigation thermoelectric properties of CuAlO2(2014-01-01); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Thermoelectric properties of Cu1-xPtxFeO2 (0.0 ≤ x ≤ 0.05) delafossite-type transition oxide(2011-03-31); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Optical properties of Cu0.95Pt0.05Fe0.97Sn0.03O2 for p-type transparent conducting oxide materials(2013-08-30); ; ; The Cu<inf>0.95</inf>Pt<inf>0.05</inf>Fe<inf>0.97</inf>Sn<inf>0.03</inf>O<inf>2</inf> sample has been synthesized by a solid-state reaction to investigate optical properties of materials of transparent conducting oxide. Crystal structure was characterized by XRD. The Seebeck coefficient and electrical conductivity were measured in the high temperature (300 to 860 K), while the XPS and UV-VIS-NIR spectra were analyzed at room temperature. The XRD peaks confirm the samples forming the delafossite structure phase. The Seebeck coefficient reveals the samples displays the p-type conducting. The XPS spectra show the Sn2+ state stabling in this compound. The optical direct gap is 3.45 eV as a visible-transparent material. These results support that the Cu<inf>0.95</inf>Pt<inf>0.05</inf>Fe<inf>0.97</inf>Sn<inf>0.03</inf>O<inf>2</inf> oxide compounds, of which the Cu<sup>1+</sup> and Fe<sup>3+</sup> sites are substituted by the Pt<sup>1+</sup> and Sn<sup>2+</sup> ions respectively, are p-type transparent conducting oxide materials. © (2013) Trans Tech Publications, Switzerland. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Enhancing thermoelectric properties of nanostructure Ga-doped ZnO prepared by microwave-hydrothermal synthesizing with comparing to calculation results(2019-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Mechanical, dielectric, thermal and antibacterial properties of reduced graphene oxide (rGO)-nanosized C3AH6 cement nanocomposites for smart cement-based materials(2019-10-15); ; This work aimed to fabricate nanocomposites of reduced graphene oxide (rGO)-nanosized C3AH6 cement via a rapid cement hydration for enhancing its micro-hardness, dielectric constant, thermal conductivity, electrochemical and antibacterial properties.rGO-nanosized C3AH6 nanocomposites (∼10–20 nm in diameter) with 1, 2, 3, and 4% weight of rGO, were successfully synthesized from a Ca12Al14O33 and rGO colloid that was rapidly heated with water to a temperature of 100 °C. Nanocomposites of x%rGO-C3AH6 (x = 1, 2, 3, and 4) were characterized using XRD, UV–vis spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy and TGA techniques. The chemical composition was confirmed using SEM and EDX characterization. The results revealed a nanocomposited rGO-C3AH6 material with nanosheet and nanoflaked rGO, as well as nanosized C3AH6 particles. The results presented rGO-C3AH6 with high performance multifunctional properties that included enhanced mechanical, dielectric, and thermal properties. The vickers micro-hardness and dielectric constant were enhanced by the effect of rGO-C3AH6 nanocomposites. The thermal conductivity of rGO-C3AH6 was higher than that of C3AH6. The electrical conductivity and electrochemical properties were effectively increased with greater levels of rGO in the material. Its antibacterial activity was confirmed by the formation of clearing zones on a Petri plate seeded with Escherichia coli (E. coli). The diameter of these zones increased with the rGO content. These results confirmed that nanocomposited rGO-C3AH6 was effective in enhancing mechanical, dielectric and thermal properties while serving as a high performance multifunctional cement-based material. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The direct measurement of the photorefractive grating on anisotropic self diffraction using digital holography(2014-09-02); ; Jindajitawat, PhuminIn this paper, the measurement of grating period in photorefractive anisotropic self diffraction by using digital holography technique is proposed. In our experimental setup, He -Ne laser beam with wavelength of 632.8 nm has been separated and then incident on photorefractive cerium doped barium titanate crystal to produce photorefractive index grating. The transmitted probe beam, which contains phase and amplitude has been expanded and recorded on digital camera. To explore the grating periods, both phase and amplitude of the images are reconstructed by numerical process using computer. Then the grating periods in photorefractive anisotropic self diffraction have been measured. The results show grating periods, holograms and their reconstruction. © 2014 Taylor & Francis Group, LLC. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Preparation, characterization and finite element computation of Cu(Al 1/2Fe1/2)O2 Delafossite-oxide themoelectric generator module(2014-09-02); ;