ZnO掺量及烧成温度对轻质陶粒性能的影响及机理分析

doi:10.16552/j.cnki.issn1001-1625.2024.1518

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (7): 2578-2588.DOI: 10.16552/j.cnki.issn1001-1625.2024.1518

ZnO掺量及烧成温度对轻质陶粒性能的影响及机理分析

李卜亚, 范海宏, 何昱洁, 卫凯博, 马春玲

西安建筑科技大学材料科学与工程学院,西安 710055

收稿日期:2024-12-09 修订日期:2025-03-03 出版日期:2025-07-15 发布日期:2025-07-24
通信作者: 范海宏,博士,副教授。E-mail:fanhaihong@163.com
作者简介:李卜亚(2000—),女,硕士研究生。主要从事固废资源化利用方面的研究。E-mail:17782626634@163.com
基金资助:
陕西省重点研发计划(2020SF-417)

Effects of ZnO Content and Firing Temperature on Properties of Lightweight Ceramsite and Mechanism Analysis

LI Boya, FAN Haihong, HE Yujie, WEI Kaibo, MA Chunling

College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

Received:2024-12-09 Revised:2025-03-03 Published:2025-07-15 Online:2025-07-24

摘要/Abstract

摘要： 本文以煤矸石为主要原料,钢渣为掺和料,SiC为造孔剂,ZnO为烧结助剂制备陶粒。研究了ZnO掺量与烧成温度对所制备陶粒内部结构与性能的影响,并分析了ZnO对陶粒矿物相改变的机理。结果表明,随ZnO掺量的增加与烧成温度的升高,陶粒骨架结构变得密实,内部大气孔逐渐减少,小气孔增多,吸水率降低。掺入3%(质量分数,下同)与4%ZnO可促进陶粒内部尖晶石相的生成,改善陶粒强度。当ZnO掺量为4%、烧成温度为1 170 ℃时,所制得陶粒性能最佳,吸水率为6.74%,堆积密度为420 kg/m³,筒压强度为3.93 MPa。

关键词: 煤矸石, 陶粒, ZnO掺量, 烧成温度, 尖晶石

Abstract: In this paper, coal gangue was used as the main raw material, steel slag as admixture, SiC as pore-forming agent, and ZnO as sintering aid to prepare ceramsite. The effects of ZnO content and firing temperature on the internal structure and properties of the prepared ceramsite were studied, and the mechanism of ZnO on the mineral phase change of the ceramsite was analyzed. The results show that with the increase of ZnO content and firing temperature, the skeleton structure of ceramsite becomes dense, the internal large pores gradually decrease, the small pores increase, and the water absorption decreases. The incorporation of 3% (mass fraction, the same below) and 4% ZnO can promote the formation of spinel phase in ceramsite and improve the strength of ceramsite. When the content of ZnO is 4% and the firing temperature is 1 170 ℃, the prepared ceramsite has the best performance, the water absorption is 6.74%, the bulk density is 420 kg/m³, and the cylinder compressive strength is 3.93 MPa.

Key words: coal gangue, ceramsite, ZnO content, firing temperature, spinel

中图分类号:

TU526

李卜亚, 范海宏, 何昱洁, 卫凯博, 马春玲. ZnO掺量及烧成温度对轻质陶粒性能的影响及机理分析[J]. 硅酸盐通报, 2025, 44(7): 2578-2588.

LI Boya, FAN Haihong, HE Yujie, WEI Kaibo, MA Chunling. Effects of ZnO Content and Firing Temperature on Properties of Lightweight Ceramsite and Mechanism Analysis[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(7): 2578-2588.

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ZnO掺量及烧成温度对轻质陶粒性能的影响及机理分析

Effects of ZnO Content and Firing Temperature on Properties of Lightweight Ceramsite and Mechanism Analysis

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