Sengphet Keokangdong - Academia.edu (original) (raw)
Uploads
Papers by Sengphet Keokangdong
Advanced Materials Research, 2013
The use of banana stem waste (BW) was evaluated as a pore-forming agent to manufacture a porous c... more The use of banana stem waste (BW) was evaluated as a pore-forming agent to manufacture a porous clay ceramic body. Raw clay was characterized by XRD, XRF and TGA. After the clay was mixed with banana stem waste, in various proportions, the mixtures were pressed before being fired at different temperatures i.e 1100°C, 1125 and 1150°C, for 3 h with a heating rate of 5°C/min. Pore formation and microstructure in the fired samples were characterized using FE-SEM, whilst bulk densities, porosities and water absorption were determined using the Archimedes method. The mechanical strength was also investigated in order to optimize the fabrication process itself. The results obtained showed shrinkages between 13.08-16.10%, density values ranging between 1.37-1.51g/cm3, whilst porosity was determined to be between 18.5 to 18.78 % and water absorption 9.77-10.06 %, respectively. The tensile strength was in the range of 9.03 to 9.80MPa. These results proved that banana stem waste (BW) is potent...
The use of banana stem waste (BW) was evaluated as a pore-forming agent to manufacture a porous c... more The use of banana stem waste (BW) was evaluated as a pore-forming agent to manufacture a porous clay ceramic body. Raw clay was characterized by XRD, XRF and TGA. After the clay was mixed with banana stem waste, in various proportions, the mixtures were pressed before being fired at different temperatures i.e 1100 o C, 1125 and 1150 o C, for 3 h with a heating rate of 5 o C/min. Pore formation and microstructure in the fired samples were characterized using FE-SEM, whilst bulk densities, porosities and water absorption were determined using the Archimedes method. The mechanical strength was also investigated in order to optimize the fabrication process itself. The results obtained showed shrinkages between 13.08-16.10%, density values ranging between 1.37-1.51g/cm 3 , whilst porosity was determined to be between 18.5 to 18.78 % and water absorption 9.77-10.06 %, respectively. The tensile strength was in the range of 9.03 to 9.80MPa. These results proved that banana stem waste (BW) is potentially capable to produce porous ceramic materials.
The use of banana stem waste (BW) was evaluated as a pore-forming agent to manufacture a porous c... more The use of banana stem waste (BW) was evaluated as a pore-forming agent to manufacture a porous clay ceramic body. Raw clay was characterized by XRD, XRF and TGA. After the clay was mixed with banana stem waste, in various proportions, the mixtures were pressed before being fired at different temperatures i.e 1100 o C, 1125 and 1150 o C, for 3 h with a heating rate of 5 o C/min. Pore formation and microstructure in the fired samples were characterized using FE-SEM, whilst bulk densities, porosities and water absorption were determined using the Archimedes method. The mechanical strength was also investigated in order to optimize the fabrication process itself. The results obtained showed shrinkages between 13.08-16.10%, density values ranging between 1.37-1.51g/cm 3 , whilst porosity was determined to be between 18.5 to 18.78 % and water absorption 9.77-10.06 %, respectively. The tensile strength was in the range of 9.03 to 9.80MPa. These results proved that banana stem waste (BW) is potentially capable to produce porous ceramic materials.
Porous sintered alumina was developed using a sponge scaffolding method and pore-forming agents (... more Porous sintered alumina was developed using a sponge scaffolding method and pore-forming agents (PFA) using natural bioresources. The polymeric sponge method used a polyurethane foam soaked in an alumina slurry prepared by mixing alumina powder and distilled water with different concentrations of alumina, i.e. 54, 57 and 63 weight percent (wt.%) alumina. The soaked sponge was then dried in an oven at 80oC. It was then sintered at 1250 °C for 3 hours. A Field Emission Scanning Electron Microscope (FE-SEM) and an optical microscope were used to observe the morphology. A compression test was also carried out to determine the mechanical property. The different alumina concentrations produced densities ranging from 0.63 to 0.31 gcm-3 with relative porosities of 78.54 to 92.60 %, water flow rate 3.00 to 3.15 cm3/s, seepage-velocity of 0.12 to 0.14 cm/s and the compressive strength 0.45 to 0.60 MPa. The microstructure showed that small and large pores were formed and these were largely int...
The main objective of this study is to ascertain the possibility of fabricating porous clay ceram... more The main objective of this study is to ascertain the possibility of fabricating porous clay ceramic materials. The raw materials consist of a kaolinitic Laotian clay and an illitic Malaysian clay, mixed with bioresource wastes (kenaf powder, kenaf fiber, banana stem and sugarcane wastes) as the pore-forming agents (PFA). The raw powders, i.e. Laotian clay (LC), Malaysian clay (MC) and bioresource wastes were initially characterized using XRF, XRD and TGA/DSC. The clay ceramic green bodies were fabricated with different types and amounts of bioresource wastes in the clay bodies (10, 20 and 30 wt%). The granulated powder mixtures were pressed hydraulically using a round stainless steel mould 23 mm diameter, under a pressure of 50MPa. It was observed that different types of bioresource waste additions did not create any shaping problems. After drying, the ceramic green bodies were fired at different temperatures (1100, 1125, 1150 and 1175oC) for 3 hours at a heating rate of 5oC/min. Th...
Advanced Materials Research, 2013
The use of banana stem waste (BW) was evaluated as a pore-forming agent to manufacture a porous c... more The use of banana stem waste (BW) was evaluated as a pore-forming agent to manufacture a porous clay ceramic body. Raw clay was characterized by XRD, XRF and TGA. After the clay was mixed with banana stem waste, in various proportions, the mixtures were pressed before being fired at different temperatures i.e 1100°C, 1125 and 1150°C, for 3 h with a heating rate of 5°C/min. Pore formation and microstructure in the fired samples were characterized using FE-SEM, whilst bulk densities, porosities and water absorption were determined using the Archimedes method. The mechanical strength was also investigated in order to optimize the fabrication process itself. The results obtained showed shrinkages between 13.08-16.10%, density values ranging between 1.37-1.51g/cm3, whilst porosity was determined to be between 18.5 to 18.78 % and water absorption 9.77-10.06 %, respectively. The tensile strength was in the range of 9.03 to 9.80MPa. These results proved that banana stem waste (BW) is potent...
The use of banana stem waste (BW) was evaluated as a pore-forming agent to manufacture a porous c... more The use of banana stem waste (BW) was evaluated as a pore-forming agent to manufacture a porous clay ceramic body. Raw clay was characterized by XRD, XRF and TGA. After the clay was mixed with banana stem waste, in various proportions, the mixtures were pressed before being fired at different temperatures i.e 1100 o C, 1125 and 1150 o C, for 3 h with a heating rate of 5 o C/min. Pore formation and microstructure in the fired samples were characterized using FE-SEM, whilst bulk densities, porosities and water absorption were determined using the Archimedes method. The mechanical strength was also investigated in order to optimize the fabrication process itself. The results obtained showed shrinkages between 13.08-16.10%, density values ranging between 1.37-1.51g/cm 3 , whilst porosity was determined to be between 18.5 to 18.78 % and water absorption 9.77-10.06 %, respectively. The tensile strength was in the range of 9.03 to 9.80MPa. These results proved that banana stem waste (BW) is potentially capable to produce porous ceramic materials.
The use of banana stem waste (BW) was evaluated as a pore-forming agent to manufacture a porous c... more The use of banana stem waste (BW) was evaluated as a pore-forming agent to manufacture a porous clay ceramic body. Raw clay was characterized by XRD, XRF and TGA. After the clay was mixed with banana stem waste, in various proportions, the mixtures were pressed before being fired at different temperatures i.e 1100 o C, 1125 and 1150 o C, for 3 h with a heating rate of 5 o C/min. Pore formation and microstructure in the fired samples were characterized using FE-SEM, whilst bulk densities, porosities and water absorption were determined using the Archimedes method. The mechanical strength was also investigated in order to optimize the fabrication process itself. The results obtained showed shrinkages between 13.08-16.10%, density values ranging between 1.37-1.51g/cm 3 , whilst porosity was determined to be between 18.5 to 18.78 % and water absorption 9.77-10.06 %, respectively. The tensile strength was in the range of 9.03 to 9.80MPa. These results proved that banana stem waste (BW) is potentially capable to produce porous ceramic materials.
Porous sintered alumina was developed using a sponge scaffolding method and pore-forming agents (... more Porous sintered alumina was developed using a sponge scaffolding method and pore-forming agents (PFA) using natural bioresources. The polymeric sponge method used a polyurethane foam soaked in an alumina slurry prepared by mixing alumina powder and distilled water with different concentrations of alumina, i.e. 54, 57 and 63 weight percent (wt.%) alumina. The soaked sponge was then dried in an oven at 80oC. It was then sintered at 1250 °C for 3 hours. A Field Emission Scanning Electron Microscope (FE-SEM) and an optical microscope were used to observe the morphology. A compression test was also carried out to determine the mechanical property. The different alumina concentrations produced densities ranging from 0.63 to 0.31 gcm-3 with relative porosities of 78.54 to 92.60 %, water flow rate 3.00 to 3.15 cm3/s, seepage-velocity of 0.12 to 0.14 cm/s and the compressive strength 0.45 to 0.60 MPa. The microstructure showed that small and large pores were formed and these were largely int...
The main objective of this study is to ascertain the possibility of fabricating porous clay ceram... more The main objective of this study is to ascertain the possibility of fabricating porous clay ceramic materials. The raw materials consist of a kaolinitic Laotian clay and an illitic Malaysian clay, mixed with bioresource wastes (kenaf powder, kenaf fiber, banana stem and sugarcane wastes) as the pore-forming agents (PFA). The raw powders, i.e. Laotian clay (LC), Malaysian clay (MC) and bioresource wastes were initially characterized using XRF, XRD and TGA/DSC. The clay ceramic green bodies were fabricated with different types and amounts of bioresource wastes in the clay bodies (10, 20 and 30 wt%). The granulated powder mixtures were pressed hydraulically using a round stainless steel mould 23 mm diameter, under a pressure of 50MPa. It was observed that different types of bioresource waste additions did not create any shaping problems. After drying, the ceramic green bodies were fired at different temperatures (1100, 1125, 1150 and 1175oC) for 3 hours at a heating rate of 5oC/min. Th...