LIN Wanpeng, WANG Lige, GONG Wei, YANG Kaili

(School of Materials and Chemistry, Southwest University of Science and Technology，Mianyang 621000, China)

Abstract：Porous ceramics were prepared by high temperature sintering method with fly ash, potassium feldspar powder and albite powder as raw materials and phosphogypsum as foaming agent.The effects of firing temperature, the amount of fly ash and phosphogypsum on the structure and properties of porous ceramics were investigated.The results show that the density and compressive strength of porous ceramics decrease with the increasing of firing temperature and the amount of fly ash, while the water absorption and porosity increase.The thermal conductivity and compressive strength of the sample decrease first and then increase with the increasing of the amount of phosphogypsum.When the mass fraction of fly ash is 35%, the mass fraction of phosphogypsum is 9%, and the firing temperature is 1 250 ℃, the porous ceramics with good comprehensive performance can be prepared.The density is 1.05 g/cm³, the mass water absorption is 5.84%, the thermal conductivity is 0.517 W/(m·K), the compressive strength is 12.76 MPa, and the porosity is 54.8%.

Keywords：porous ceramics; fly ash; phosphogypsum; thermal conductivity

Received：2022-07-28，Revised：2022-11-17,Online：2023-01-11 11:27。

Funding Project：四川省科技厅重点研发项目，编号：2021YFH0089。

First Author:蔺万鹏(1997—)，男，硕士研究生，研究方向为多孔陶瓷材料。E-mail：1572331704@qq.com。

Corresponding Author:王丽阁(1980—)，女，讲师，博士，硕士生导师，研究方向为功能陶瓷材料及金属基复合材料。E-mail：4971159@qq.com。