Surat Thani, Thailand

Suratthani Rajabhat University

www.sru.ac.th
Surat Thani, Thailand

Time filter

Source Type

Thongkanluang T.,Suratthani Rajabhat University | Kittiauchawal T.,Thepsatri Rajabhat University | Limsuwan P.,King Mongkut's University of Technology Thonburi
Ceramics International | Year: 2011

Green pigments with high near infrared reflectance based on a Cr 2O3-TiO2-Al2O3-V 2O5 composition have been synthesized. Cr 2O3 was used as the host component and mixtures of TiO2, Al2O3 and V2O5 were used as the guest components. TiO2, Al2O3, and V2O5 were mixed into 39 different compositions. The spectral reflectance and the distribution of pigment powder were determined using a spectrophotometer and a scanning electron microscope, respectively. It was found that a pigment powder sample S9 with a Cr2O 3-TiO2-Al2O3-V2O 5 composition of 80, 4, 14 and 2 wt%, respectively, gives a maximum near infrared solar reflectance of 82.8% compared with 49.0% for pure Cr 2O3. The dispersion of pigment powders in a ceramic glaze was also studied. The results show that the pigment powder sample S9 is suitable for use as a coating material for ceramic-based roofs.


Thongkanluang T.,Suratthani Rajabhat University | Chirakanphaisarn N.,Huachiew Chalermprakiet University
Key Engineering Materials | Year: 2016

Light green pigments based on Cr2O3, TiO2, Al2O3 and SiO2were prepared for reflective heat from solar radiation. The prepared pigment powders were mixed with ceramic glaze and sprayed onto ceramic substrates and then calcining accordance with ceramic processing for the reflectance measurement. The results show that the ceramic glaze 100 g mixed with the prepared pigment 5 g gives a maximum near infrared solar reflective of 70.94 %. The comparisons of performance test between prepared pigment and commercial green pigment that use for ceramic coating tile roof were covered two test boxes for temperature measurement. The results shown that the prepared pigment using make decrease the middle - room temperature less than commercial pigment using about 0.8 °C. It can be concluded that the prepared pigment is suitable to be used as a coating ceramic-based roofs for reducing the heat penetrating into the building. © 2016 Trans Tech Publications, Switzerland.


Thongkanluang T.,Suratthani Rajabhat University | Limsuwan P.,King Mongkut's University of Technology Thonburi | Rakkwamsuk P.,King Mongkut's University of Technology Thonburi
International Journal of Applied Ceramic Technology | Year: 2011

Complex inorganic green pigments having a high near-infrared (NIR) solar reflectance were synthesized. Chromium oxide (Cr2O3) was used as the host component with mixtures of TiO2, Al 2O3, and V2O5 as the guest components. TiO2, Al2O3, and V 2O5 were mixed into 39 different compositions. It was found that a sample, denoted by S9, with the composition of Cr2O 3, TiO2, Al2O3, and V 2O5 are 80, 4, 14, and 2 wt%, respectively, gives a maximum NIR solar reflectance of 82.8% compared with 69.6% of a commercially available cool pigment powder. The comparison study on the effectiveness of the synthesized pigment and a commercial pigment on ceramic glaze and sprayed on ceramic tile roofs show that the new powder has given a better result by keeping the tested room about 2°C cooler. It can be concluded that the new formulated green pigment is a highly thermal effective as an NIR reflective roof coating. © 2010 The American Ceramic Society.


Thongkanluang T.,Suratthani Rajabhat University | Chirakanphaisarn N.,Siam Technology College | Limsuwan P.,King Mongkut's University of Technology Thonburi
Procedia Engineering | Year: 2012

Complex inorganic brown pigments having a high near infrared solar reflectance have been synthesized. Fe2O3 is the host component and mixtures of Sb2O3, SiO2, Al 2O3, and TiO2 were used as the guest components. Sb2O3, SiO2, Al2O 3, and TiO2 were mixed into 40 different compositions. It was found that a sample, denoted by S31, with a composition of Fe 2O3, Sb2O3, SiO2, Al 2O3, and TiO2 of 70, 10, 12, 2 and 6 wt% respectively, gives a maximum near infrared solar reflectance of 46.7%. Brown pigment colours were measured in CIE L*a*b* colour index. The S31 pigment powder was then prepared as a reflective coating material with different amounts of pigment powder from 4- 8 g in 100 g of ceramic glaze. The prepared materials were sprayed on the biscuit clay tiles for reflectance measurements. It was found that 5 g of S31 pigment powder mixed with 100 g of ceramic glaze gives the highest near-infrared reflectance value of 41.3 %. The newly synthesized pigment is a suitable ceramic roof coating for its high reflectance performance and the durability performing once the ceramic roof installed on house. © 2010 Published by Elsevier Ltd.


Noparat P.,Suratthani Rajabhat University | Maneerat S.,Prince of Songkla University | Saimmai A.,Phuket Rajabhat University
World Journal of Microbiology and Biotechnology | Year: 2014

A biosurfactant-producing bacterium, isolate 2/3, was isolated from mangrove sediment in the south of Thailand. It was evaluated as a potential biosurfactant producer. The highest biosurfactant production (4.52 g/l) was obtained when the cells were grown on a minimal salt medium containing 25 % (v/v) palm oil decanter cake and 1 % (w/v) commercial monosodium glutamate as carbon and nitrogen sources, respectively. After microbial cultivation at 30 °C in an optimized medium for 96 h, the biosurfactant produced was found to reduce the surface tension of pure water to 25.0 mN/m with critical micelle concentrations of 8.0 mg/l. The stability of the biosurfactant at different salinities, pH and temperature and also its emulsifying activity was investigated. It is an effective surfactant at very low concentrations over a wide range of temperatures, pH and salt concentrations. The biosurfactant obtained was confirmed as a glycolipid type biosurfactant by using a biochemical test, fourier-transform infrared spectroscopy, MNR and mass spectrometry. The crude biosurfactant showed a broad spectrum of antimicrobial activity and also had the ability to emulsify oil and enhance polyaromatic hydrocarbons solubility. © 2013 Springer Science+Business Media Dordrecht.


Kruaehong T.,Suratthani Rajabhat University
Advanced Materials Research | Year: 2014

The YBa2Cu3O7-d(Y123) compounds were synthesized by solid state reaction method. The home-made four-probes apparatus was used for the resistivity measurement. The highest Tc is 91. 95 K in sample C and sample A has lowest Tc onset at 89. 85 K. The crystal structure properties and oxygen content were characterized by powder X-ray diffraction using CuKα radiation (λ=1. 5406 Å). The Pmmm and Pnma space group corresponding on the superconducting phase and the non-superconducting phase. The atomic position of samples was consisted of various element atoms. The longer time of oxygen-doping, the increase the critical temperature, superconducting phase and c lattice parameters. © (2014) Trans Tech Publications, Switzerland.


Angkananon K.,Suratthani Rajabhat University | Wald M.,University of Southampton
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2016

This paper focuses on extending the Technology Enhanced Accessible Interaction Framework Method for visual impairment based on interviews with people with visual impairment to help developers develop accessible technology solutions to help people with visual impairment to interact with people, technologies and objects. © Springer International Publishing Switzerland 2016.


Kruaehong T.,Suratthani Rajabhat University
Journal of the Australian Ceramic Society | Year: 2015

The Y123, Y358 and Y3-811 bulk superconductors have been synthesized by solid state reaction using fluorine doping. The composite superconductors were characterized by a homemade standard d.c. four-probe method. The crystal structure was investigated by powder X-ray diffraction analysis. The X-ray diffraction spectrum was analyzed using a FULLPROF software program. The results revealed that Tconset and Tcoffset decrease when the fluorine doping is increased. These materials had closely the same value in a,b direction. The lower superconducting phase, critical temperature, value of c direction and anisotropic were found at fluorine doping. © 2015, The Australian Ceramic Society.


Rakbamrung P.,Suratthani Rajabhat University
Physics Education | Year: 2015

This paper presents the simple apparatus and steps to demonstrate the gravitational acceleration point of the vector, which is advantageous for students who lack reading comprehension. © 2015 IOP Publishing Ltd


Kruaehong T.,Suratthani Rajabhat University
Advanced Materials Research | Year: 2013

The new Y257 superconductor in YBaCuO family was synthesized by standard solid state reaction. The Y257 samples were measured the critical temperature(Tc) by the four-probes method that found at 90 K. The XRD technique and FULLPROF program were used to determine the lattice parameters, space group and phase compositions. It was found that the Y257 exhibited in both of superconducting and non-superconducting phase. The Pmmm space group was fit well on superconducting phase with the lattice parameters as a=3.8108 Å, b=3.8544 Å and c=26.4967 Å. The non-superconducting phase exhibited in two space groups of Pccm (a=12.9770 Å, b=20.54780 Å and c=11.3530 Å) and Im-3m (a= 18.2104 Å, b=18.2104 Å and c=18.2104 Å). The peritectic temperature at 976.73°C was measured by differential thermal analysis. © (2013) Trans Tech Publications, Switzerland.

Loading Suratthani Rajabhat University collaborators
Loading Suratthani Rajabhat University collaborators