| With the gradual improvement of science and technology, more and more people pay attention to their living environment, particularly the indoor environment. Diatomaceous earth, an inorganic non-metallic materials having a porous structure, can play an important role in the field of building materials. The diatomaceous earth-based construction materials have been widely used in buildings of foreign countries. It not only retains the high temperature, corrosion resistance, compressive strength advantages, but also has dehumidification, regulate indoor air and so on. On the basis of this study, researchers have indoor diatomaceous earth functional materials based composites.Experimental results show that:with the temperature raised, the melting amorphous silica can cause the diatom structure destroyed and the temperature is too low too completely decomposing calcium carbonate. With the increase of the content of celite, the compressive strength of the product gradually decreased. Fly ash will reduce porosity. The anatase TiO2 made by sol-gel method and its complex with ultrasonic method based products in the diatomite. Activated carbon was added to the formulation in the form of raw materials, calcined diatomite composite article in a reducing atmosphere condition.After a preliminary exploration of the impact about each ingredient added to the product performance, the use of orthogonal design to determine the best formulation:diatomaite 54%, sugar filter mud 23%, fly ash 23%; The DTA test can assure the final sintering temperature 950 ℃. The X-ray diffraction analysis, SEM and EDS investigate the microstructure of sintered products, morphology and composition analysis. The test result is flexural 8.880MPa, water absorption 60.341%, bulk density 976Kg/m3 and porosity 60.382%. The formaldehyde adsorption value can reach 50.13% by diatomite loading TiO2. The diatomite composite material can be made by repeated testing and adjusting the ratio of raw materials. |
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