Preparation of Porous Ceramics from Titanium-Bearing Blast Furnace Slag and Study on Their Microstructure and Properties AITranslate

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Chinese Library Classification Number:TQ174.9[化学工程—陶瓷工业]

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Titanium-bearing blast furnace slag-based porous ceramics were prepared with titanium-bearing blast furnace slag as the raw material,borax as the flux and stearic acid as the porogen by mixing,molding and sintering.The effects of borax and stearic acid addition on the microstructure and properties of the prepared porous ceramics were studied,respectively.The results show that the main phases of porous ceramics prepared by adding borax and stearic acid are perovskite,clinopyroxene,calcium borate,and sodium titanium silicate.Varying the addition amounts of borax and stearic acid does not change the phase composition of porous ceramics.With the increase of borax addition,there is no significant change in the total porosity of the prepared porous ceramics,but their closed porosity and compressive strength increase,and their thermal conductivity decreases.With the increase of stearic acid addition,the total porosity of porous ceramics increases,while their density,compressive strength and thermal conductivity decrease.The prepared porous ceramics with the addition of 9%borax and 40%stearic acid exhibit excellent overall properties:a total porosity of 75.03%,a density of 0.85 g/cm³,a compressive strength of 2.29 MPa,and a thermal conductivity of 0.25 W/(m·K).