基于γ-C_(2)S的蜂窝陶瓷常温制备与性能研究  

Room Temperature Preparation ofγ-C_(2)S-based Honeycomb Ceramics and Their Properties

作　　者：邹家伟 刘志超[1,2] 王发洲[2] ZOU Jiawei;LIU Zhichao;WANG Fazhou(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Silicate Materials for Architecture,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《材料导报》2025年第4期49-55,共7页Materials Reports

基　　金：国家自然科学基金(U2001227)。

摘　　要：在污染排放物处理系统中,蜂窝陶瓷作为关键组件常常需要在高温条件下制备。提出一种新型制备方法,利用γ-C_(2)S在常温下通过碳化养护方式制备蜂窝陶瓷,避免了高温烧结。以γ-C_(2)S为原料,通过添加硅灰、减水剂、塑化剂和水等,调控坯料塑性,经碳化养护后获得力学性能优异的蜂窝陶瓷。研究了增稠剂掺量与预干燥制度对蜂窝陶瓷抗压强度的影响规律,分析了不同碳化时长下蜂窝陶瓷的强度发展与微观结构变化。结果表明:羟丙基甲基纤维素醚(HPMC)掺量为2.5%(质量分数,如无特别说明,下同),碳化养护前将试样预干燥至0.10剩余水固比,在0.3 MPa CO_(2)分压条件下养护12 h,试样抗压强度可达46.8 MPa。碳化过程中生成的方解石型碳酸钙填充了孔隙,使材料结构更加致密,这是蜂窝陶瓷试样强度迅速发展的主要原因。掺入2.5%TiO_(2)制成整体式蜂窝陶瓷催化剂,利用其光催化80 min后甲基橙降解率达到45.12%。In the context of pollution abatement systems,the preparation of honeycomb ceramics,a pivotal constituent,conventionally necessitates elevated temperature conditions.This research introduces an innovative preparation methodology,proposing the utilization ofγ-C2 S for the ambient temperature fabrication of honeycomb ceramics through a carbonation curing process,thereby obviating the need for high-temperature sintering.Employingγ-C2 S as the primary raw material and incorporating silica fume,water-reducing agents,plasticizers,and water,the plasticity of the raw mixture was meticulously controlled to attain superior mechanical properties in the honeycomb ceramics subsequent to carbonation curing.This study systematically examined the impact of thickening agent content and pre-drying protocols on the compressive strength of honeycomb ceramics.Concurrently,an in-depth analysis of the strength progression and microstructural alterations in honeycomb ceramics subjected to varying durations of carbonation was conducted.The outcomes reveal that an HPMC content of 2.5wt%,pre-drying the samples to a residual moisture content of 0.10,and 12 h of curing under 0.3 MPa CO_(2) pressure yield a compressive strength of 46.8 MPa in the specimens.The genesis of aragonite-type calcium carbonate during carbonation serves to fill the pores,culminating in heightened material density.This phenomenon stands as the predominant factor contributing to the expeditious advancement of strength in the honeycomb ceramic samples.The monolithic honeycomb ceramic catalyst was made by doping 2.5wt%TiO_(2),and the methyl orange degradation rate reached 45.12%after 80 min of photocatalysis.

关 键 词：γ-C_(2)S 免烧结蜂窝陶瓷 碳化 力学性能 TiO_(2)负载 

分 类 号：TU528[建筑科学—建筑技术科学]