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Method for preparing oriented porous silicon nitride ceramics based on nylon fiber serving as pore forming agent
The invention discloses a method for preparing oriented porous silicon nitride ceramics based on nylon fibers serving as a pore forming agent. The method comprises the following steps of mixing silicon nitride, nylon fibers with different lengths, a sintering aid, an organic additive and deionized water according to different solid contents, wherein the ratios of silicon nitride, the nylon fibers, the sintering aid, the organic additive and the deionized water are different; ageing for a period of time, then, placing the mixture into a press machine, and carrying out extrusion molding at different extruding speeds to obtain a green ceramic blank; and degumming the green blank, and then, sintering at the nitrogen atmosphere to finally obtain the oriented porous silicon nitride ceramics. The method disclosed by the invention has the characteristics of low cost and simple process; and the quality of ceramics is easily controlled. After being industrialized, the oriented porous silicon nitride ceramics can be directly used for dust removal and purification of high-temperature flue gas. Except for filtering the high-temperature flue gas, the porous silicon nitride ceramics can also be used for intermediate filtration of enterprises such as energy and petrochemical engineering and waste air filtration, so as to provide technical assistance for the sustainable development of the national economy.
Method for preparing oriented porous silicon nitride ceramics based on nylon fiber serving as pore forming agent
The invention discloses a method for preparing oriented porous silicon nitride ceramics based on nylon fibers serving as a pore forming agent. The method comprises the following steps of mixing silicon nitride, nylon fibers with different lengths, a sintering aid, an organic additive and deionized water according to different solid contents, wherein the ratios of silicon nitride, the nylon fibers, the sintering aid, the organic additive and the deionized water are different; ageing for a period of time, then, placing the mixture into a press machine, and carrying out extrusion molding at different extruding speeds to obtain a green ceramic blank; and degumming the green blank, and then, sintering at the nitrogen atmosphere to finally obtain the oriented porous silicon nitride ceramics. The method disclosed by the invention has the characteristics of low cost and simple process; and the quality of ceramics is easily controlled. After being industrialized, the oriented porous silicon nitride ceramics can be directly used for dust removal and purification of high-temperature flue gas. Except for filtering the high-temperature flue gas, the porous silicon nitride ceramics can also be used for intermediate filtration of enterprises such as energy and petrochemical engineering and waste air filtration, so as to provide technical assistance for the sustainable development of the national economy.
Method for preparing oriented porous silicon nitride ceramics based on nylon fiber serving as pore forming agent
YU FANGLI (author) / BAI YU (author) / HAN PENGDE (author) / ZHANG XIA (author) / WU QISHENG (author) / NI SHU (author)
2015-04-22
Patent
Electronic Resource
English
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