Comparative properties of ceramic-based roofing sheets from local raw materials synthetic products after heat treatment

Ceramic roofing sheets were fabricated in the laboratory by using ideal raw materials. The fabricating materials are coiled coconut fibre, palm fruit fibre, fresh water, river sand, polymeric dust, saw dust and cement. The resulting product was compared with factory -produced ceramic-based roofing sheets that are easily available in the Nigerian market. Both materials were of similar compositions except the mode of introduced polymeric materials. Samples of both materials were characterized in terms of rate of water absorption, density and breaking load. The properties of the materials show that the introduction of the polymeric dust at the fabrication stage and heat-treatment within the polymeric organic solution tremendously improved the quality of the ceramic-based roofing sheets. There was no significant difference on the quality of both samples. However, the total cost of production for the heat-treated finished production was relatively higher than the samples that were directly fabricated with polymeric dust as the dopant. (Journal of Applied Sciences & Environmental Management: 2002 6(2): 33-36

Comparative Properties of Ceramic-Based Roofing Sheets from Local Raw Materials Synthetic Products after Heat Treatment

Ceramic roofing sheets were fabricated in the laboratory by using ideal raw materials. 'The fabricating materials are coiled coconut fibre, palm fruit fibre fresh water river sand, polymeric dust, saw dust and cement. The resulting product was compared with factory -produced ceramic-based roofing sheets that are easily available in the Nigeria markets. Both materials were of similar compositions except the mode of introduced polymeric materials. Samples of both materials were characterized in terms of rate of water absorption, density and breaking load. The properties of the materials show that the introduction of the polymeric dust at the fabrication stage and heat-treatment within the polymeric organic solution tremendously improved the quality of the ceramic-based roofing sheets. There was no significant difference on the quality of both samples. However, the total cost of production for the heat-treated finished product was relatively higher than the samples that were directly fabricated with polymeric dust as the dopant

Comparative properties of ceramic-based roofing sheets from local raw materials synthetic products after heat treatment

Ceramic roofing sheets were fabricated in the laboratory by using ideal raw materials. `The fabricating materials are coiled coconut fibre, palm fruit fibre fresh water river sand, polymeric dust, saw dust and cement. The resulting product was compared with factory -produced ceramic-based roofing sheets that are easily available in the Nigeria markets. Both materials were of similar compositions except the mode of introduced polymeric materials. Samples of both materials were characterized in terms of rate of water absorption, density and breaking load. The properties of the materials show that the introduction of the polymeric dust at the fabrication stage and heat-treatment within the polymeric organic solution tremendously improved the quality of the ceramic-based roofing sheets. There was no significant difference on the quality of both samples. However, the total cost of production for the heat-treated finished product was relatively higher than the samples that were directly fabricated with polymeric dust as the dopant. @ JASE

Simulation of quantum dots (QDs) in the confinement regime

Abstract: The ground state confinement energy and its associated wavelength as a function of radius for three different semiconductor quantum dots (QDs) were calculated using the Brus equation. The experimental observation of the size dependence on the band gap energy is in good agreement with the theoretical models for the semiconductor nanocrystals considered. The confinement of electrons in semiconductor quantum dots increases dramatically with decrease in its size (radius) and shows exponential dependence on wavelength of light emitted

Solutions of the D-Dimensional Schrödinger Equation with the Hyperbolic Pöschl-Teller Potential plus Modified Ring-Shaped Term

We solve the D-dimensional Schrödinger equation with hyperbolic Pöschl-Teller potential plus a generalized ring-shaped potential. After the separation of variable in the hyperspherical coordinate, we used Nikiforov-Uvarov (NU) method to solve the resulting radial equation and obtain explicitly the energy level and the corresponding wave function in closed form. The solutions to the energy eigenvalues and the corresponding wave functions are obtained using the NU method as well