Research On The Technology Of The Laser Proessing

China is one of the countries that first discover and use ceramics in the world.3000years ago, ceramic experienced the transition from pottery to porcelain, making itsapplication range much wider, but all of these were inseparable from the discovery anduse of glaze material and the improvement of the kiln. With the development of socialeconomy and the improvement of people’s living standard, people need more and moreceramic products, not only with a wide range of varieties and shapes, but also withfantastic decorations. Moreover, the appearance of the technics of overglaze color,in-glaze color and underglaze colour receives an increasing favor from domestic andforeign consumers. So China becomes the world’s largest country in the production andconsumption of daily-used ceramic, art pottery, craft ceramic and building sanitaryceramics. The ceramics have not only a huge consumer market in our country, but also agreat demand in the world. With people’s increasing demand for quality and appearanceof ceramics, their pursuit of beauty tends to be more personalized, therefore, themass-production of "stereotyped" ceramic glazes decorations cannot meet people’sincreasingly high needs for arts and culture any more. Customer-to-design in small lotsor even one-piece production will become a trend in the future to produce high-gradeceramic decorations.Ceramic glazes decoration plays an important part in beautifying daily-usedceramics and promoting the value of ceramic works of art. The traditional method ofproducing ceramic glazes decoration is to adopt colored glaze or ceramic pigment mixedup with colorradical and flux, composing a pattern on the ceramics by a certaintechniques (including template-making, repeat chromatography or portrayal, etc) andthen forming glazes decoration after firing through a kiln. The traditional firing of glazesdecoration not only has tedious processes and long firing cycle, but also wastes a great deal of energy, polluting the atmospheric environment. Therefore it’s urgent to makeinnovation on the traditional firing process. Based on what have discussed above, thispaper, aiming at developing a new laser-processing method of the personalized andhigh-grade ceramic polychrome, has done a large number of experiments to explorenew techniques of cladding glazes processed by laser.By using a common sintering furnace to perform glaze-firing test on ceramicpigment embryo coated with glaze material, it also adopts the laser devices to conductlaser-processing on ceramic pigment embryo coated with the same glaze material. Then,this paper makes analysis and comparison on the shape, structure, chroma of the glaze aswell as the attachment of substrate formed by the above operation. After lots of trial anderror analysis, this paper tries to adjust the parameters of the laser-processing and explorethe appropriate laser-processing method to produce glaze. Moreover, it also studies theinfluence of the laser machining parameters on the appearance and micro-structure of thecladding glaze layer.The previous experimental studies have shown that high-power lasers are notsuitable for sintering the cladding glazes, while the ideal cladding glazes can be obtainedthrough reasonably adjusting the processing parameters with small-power lasers. As forspraying ceramic glaze, glaze-spraying, much easier to control the thickness of glazes,has a better effect than that of glaze-soaking. The experiment also shows that the glazelayer of cladding glazes has a good quality when the glaze thickness is limited in a scopeof0.08mm~0.16mm.The laser power and scanning speed has a great influence on the processingparameters of the cladding glaze layers. By increasing laser power and decreasingscanning speed, the enhancement of the melting glaze layers’ depth can be achieved, socan the melting glaze layers’ width. Under normal circumstances, in order to get a thickermolten glaze layer, the laser power should also be slightly increased as well asprolonging the preset time of the coating’s glaze-spraying, but the scanning speed shouldnot be too large, otherwise a good glaze quality couldn’t be obtained. Through reasonablysetting the processing parameters, a new glaze decorative methods—micro-cracks glazeis found in this experiment.By analyzing the micro-structure of the cladding glaze layer, the binding layerbetween body and glazes, dealt with reasonable laser power and scanning speed, is wellformed, with mullite crystals scattering among the glass phase, functioning as the enhancement of the ceramics. When the substrate is biscuit, of37%laser energy,30mmscanning speed, and30mm defocus amount, the quality of the cladding glaze layer ismore desirable.