Determination of the Effect of LASER

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Date
2015-06-17
Authors
Omima Nasr Eldeen Mohamed Ahmed, Mohamed
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Publisher
University of Khartoum
Abstract
The research aims to study the effect of laser beams on the parameters (dimensions) of lattice hematite (ferric oxide). Hematite was obtained by dissolving 25g of ferric chloride in 900 ml of distilled water and then partition the mixture into three parts. Two parts were irradiated by helium neon laser with a wavelength of 632.8nm. The power of the laser beam on the first part was and in the second part was 10mW. The third part was not irradiated by laser. Ammonium hydroxide was added to each part until the pH of the solution became 8.5. The irradiation continued for 30 minutes after addition of ammonium hydroxide. The reflex method was used to produce hematite, and the three samples were dried in an oven to obtain crystals of hematite. The composition of each sample of was studied by X-ray diffraction using powder technique (XRD).The X-ray spectrum of each sample was analyzed by the software (X,bert high score) to measure the lattice parameters. The results showed that samples irradiated by 5mWincreased in the x-axis (a) by 0.002A, in the y-axis (b) by 0.002A, and the z-axis(c) by 0.024A with decrease in density by 0.01g/cm3.Samples irradiated by 10mW increased in the x-axis (a) by 0.003A, in the y-axis (b) by 0.003A, and the z-axis(c) by 0.029A with the decrease in density by 0.02g/cm3. The results indicated that increasing the power of the laser led to an increase in lattice parameters and decrease in the density of the hematite. The study recommended using different types of laser to determine their effect on parameters of hematite
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Determination of the Effect of LASER
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