Method for preparing aluminum titanate composite porous ceramic by adopting two-step solid-phase sintering process: Fid-Bau Portal

Method for preparing aluminum titanate composite porous ceramic by adopting two-step solid-phase sintering process

BAI YANG / WANG YIRONG / WANG XUEQIAN / QIAO LIJIE

The invention discloses a method for preparing aluminum titanate composite porous ceramic by adopting a two-step sintering process, and belongs to the field of inorganic non-metallic material manufacturing. The preparation method comprises four key steps of clinker preparation, powder mixing, green body preparation and two-step sintering. The sintering process is a two-step solid-phase sintering process, in the first stage, the temperature is raised to 1100-1400 DEG C at the heating rate of 1-5 DEG C/min, heat preservation is conducted for 1-30 h, and furnace cooling is conducted; and in the second stage, the temperature is rapidly increased to 1500-1700 DEG C at the heating rate of 5-10 DEG C/min, heat preservation is conducted for 0-30 min, furnace cooling is conducted to the room temperature, and air atmosphere normal-pressure sintering is conducted in the two steps. The aluminum titanate composite porous ceramic prepared by adopting the technology has the advantages of high porosity, good mechanical property, low thermal expansion coefficient and the like. The preparation method and the two-step sintering process of the aluminum titanate composite porous ceramic are low in cost, simple in process, good in stability and suitable for industrial production.

本发明公开一种采用两步法烧结工艺制备钛酸铝复合多孔陶瓷的方法，属于无机非金属材料制造领域。制备方法包括熟料制备、粉末混合、生胚制备和两步法烧结四个关键步骤。其中烧结工艺为两步法固相烧结过程，第一段先采用1～5℃/min的升温速率至1100～1400℃，保温1～30h，随炉冷却；第二段采用5～10℃/min的升温速率快速升至1500～1700℃，保温0～30min，随炉冷却至室温，两步均为空气气氛常压烧结。采用本发明技术制备的钛酸铝复合多孔陶瓷具有高孔隙率、良好力学性能和较低热膨胀系数等优点。本发明提供的钛酸铝复合多孔陶瓷的制备方法与两步法烧结工艺，成本低廉，工艺简单，稳定性好，适于工业化生产。

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