چكيده به لاتين
Abstract:
In this project, combustion methods have been used to produce black pigment based on suitable cobalt chromite for the preparation of inkjet ceramic inks. In the first step, ceramic chromite cobalt pigments were prepared by combustion synthesis method. The optimum temperature of calcination was 1000 ° C. then by increasing of ratios of manganese and iron, green pigments were changed to black. examining the color properties of the two groups of samples revealed one containing manganese (with the formula Mn0.9CoCr1.1O4) and the other containing iron (with the formula Fe1.5CoCr0.5O4). In the second step, the samples were synthesized via co-precipitation in presence and absence of surfactant. The sample with appropriate amount of manganese was synthesized by co-precipitation which contains 4% copolymer polyethylene glycol copolymer polyethylene methacrylate (MP) mono ester. Because of the magnetic properties of iron-containing samples, they do not have suitable ink conditions, so the Mn0.9CoCr1.1O4 sample was made by using the ink combustion synthesis. In the third step, after examining the color properties of the samples, ceramic ink was prepared using different dispersant. Ink materials were investigated for physical properties. According to the results obtained from turbidi metri, surface tension and filtration tests, it was found that the ink prepared by AA-CO-AI and P123 dispersants showed better stability compared to other inks, this result was matched by the Zeta potential test. The method of applying for firing was dropping ink on glazed tile. Identification of the phases in the synthesized pigments and determination of the size of the crystals determined by the X-ray diffraction pattern. Scanning electron microscopy was used for particle morphology. Colorimetric parameters of pigments were measured using a spectrophotometer (CIE-Lab system). The results of scanning electron microscopy proved that the inks were more suitable. The results of the surface tension test of inks were also suitable for inkjet printing.
Keywords: Black pigment, Cobalt chromite, Solvent combustion synthesis, Co-precipitation, Ink, Ink jet printing.
