珍珠岩尾矿制备发泡陶瓷的研究

摘要/Abstract

摘要： 以珍珠岩尾矿为主要原料、SiC微粉为发泡剂制备发泡陶瓷,研究了温度、升温速率、保温时间、发泡剂含量、原料粒度、SiC粒度对发泡陶瓷容重、显气孔率、抗压强度和孔结构的影响。结果表明,适当升高温度、延长保温时间、增加SiC含量以及减小原料粒度和SiC粒度,试样的容重和抗压强度降低,显气孔率增大,当SiC反应过量时,试样会出现黑心。在温度为1 250 ℃、升温速率为8 ℃/min、保温时间为1 h、外掺0.6%(质量分数)SiC、原料粒度D₃₂为7.51 μm条件下,制备的发泡陶瓷综合性能最佳,容重为462.77 kg/m³,显气孔率为1.26%,抗压强度为8.1 MPa,孔的平均直径为0.33 mm。

关键词: 发泡陶瓷, 珍珠岩尾矿, 孔结构, 粒度, 力学性能

Abstract: Foamed ceramics were prepared using perlite tailings as main raw material and SiC micro powder as foaming agent. The effects of temperature, heating rate, holding time, foaming agent content, raw material granularity, and SiC particle size on density, apparent porosity, compressive strength, and pore structure of foamed ceramics were studied. The results show that with the appropriately increase of temperature, holding time, SiC content, and the decrease of raw material granularity and SiC particle size, the sample density and compressive strength decrease, and the apparent porosity increases. When SiC reaction is excessive, black centers appears in sample. At 1 250 ℃, with a heating rate of 8 ℃/min, a holding time of 1 h, an external addition of 0.6%(mass fraction) SiC, and a raw material particle size D₃₂ of 7.51 μm, the prepared foamed ceramics has the best comprehensive performance, with density of 462.77 kg/m³, apparent porosity of 1.26%, compressive strength of 8.1 MPa, and average pore diameter of 0.33 mm.

Key words: foamed ceramics, pearlite tailing, pore structure, particle size, mechanical property

中图分类号:

TQ174

武肖剑, 樊军民, 周明凯, 张朝阳, 梅文政. 珍珠岩尾矿制备发泡陶瓷的研究[J]. 硅酸盐通报, 2024, 43(11): 4140-4149.

WU Xiaojian, FAN Junmin, ZHOU Mingkai, ZHANG Zhaoyang, MEI Wenzheng. Preparation of Foamed Ceramics from Pearlite Tailings[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(11): 4140-4149.

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