Preparation And Properties Of Antistatic Ceramics With High Fe₂O₃Content

The ceramic industry has brought huge economic benefits for the development of societyevery year, but there are also a series of serious problems at the same time. However, with thegovernment vigorously implementing of lower energy consumption and lower pollutionproduction, the pattern of production of Chinese ceramic industry will be improved, in orderto enhance the rate of energy utilization and waste recycling utilization, as well as reduce theenvironment pollution. On this basis, through the investigating and survey, the yield of wasteresidue with free iron from quarries has reached to tens of thousands of tones every year. Thus,if this kind of waste residue would be used as raw materials of ceramics, it not only bringseconomic benefits, but also reduces the burden of the environment. At the same time, utilizingthe higher contention of Fe₂O₃and Fe₃O₄in the raw materials, new-type ceramics materialswith anti-static function, which also have higher additional value, had been prepared andresearched. Therefore, utilizing slag raw materials to prepare high Fe₂O₃antistatic ceramicshas important research value and meaning.In this dissertation, high Fe₂O₃antistatic ceramics have been prepared with the wasteresidue with free iron from quarries as the raw materials, and explore the applicationprospects. At first, through testing results prove that the main components of high iron slagare Fe₃O₄, SiO₂and Al₂O₃, as well as alkali metal oxides and alkaline-earth metallic oxide,which are similar with that of raw materials of ceramics. At the same time, the sodiumtripolyphosphate or PPA-Na can be added to make the slurry having better stability. Thus, itproves the feasibility that using the residue as one raw material to prepare the high Fe₂O₃antistatic ceramics. And then, at this basis, the optimal briquetting pressure of the slag rawmaterial and clay mixture is15²0MPa. And then through the experiment results anddiscussion, the optimal sintering procedure to prepare high Fe₂O₃antistatic ceramics withbetter performance, has been confirmed.At the same time, through orthogonal experimental design, the influence of some keyfactors, such as the content of Fe₂O₃, the highest firing temperature, the milling time, to theperformances of high Fe₂O₃antistatic ceramics, such as water absorption, apparent porosity,apparent density, breaking strength and body resistivity, have been researched in thisdissertation. And then, through results discussion of orthogonal experiment, the optimalinfluencing factors have been confirmed and optimal formula has been proposed. Throughfurther researches, the optimal milling time is3h and firing temperature is1100oC, as well as optimal ratio of raw materials which contains19.56%Fe₂O₃. Moreover, through the optimalpreparation method, the high Fe₂O₃antistatic ceramic with lower water absorption, higherstrength and lower resistivity have been successfully prepared. The body resistivity of thehigh Fe₂O₃antistatic ceramic is about108～1010Ω·cm, and the breaking strength is about70⁸0MPa.