文献类型：期刊文献

英文题名：Preparation and properties of ZTA ceramics using blast furnace slag as sintering additives

作者：Ma, Decao[1];Chen, Haitao[1];Cheng, Xiangqian[1];Gao, Kai[1];Wang, Lei[1];Zhang, Liwei[2];Wang, Hailong[1];Zhang, Rui[1,3];Lu, Hongxia[1]

第一作者：Ma, Decao

通讯作者：Lu, HX[1]

机构：[1]Zhengzhou Univ, Sch Mat Sci & Engn, 100 Sci Rd, Zhengzhou 450001, Henan, Peoples R China;[2]Xinxiang Univ, Xinxiang 453003, Peoples R China;[3]Zhengzhou Univ Aeronaut, Zhengzhou 450015, Henan, Peoples R China

第一机构：Zhengzhou Univ, Sch Mat Sci & Engn, 100 Sci Rd, Zhengzhou 450001, Henan, Peoples R China

通讯机构：[1]corresponding author), Zhengzhou Univ, Sch Mat Sci & Engn, 100 Sci Rd, Zhengzhou 450001, Henan, Peoples R China.

年份：2019

卷号：6

期号：6

外文期刊名：MATERIALS RESEARCH EXPRESS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000460541500001)】；

基金：This work is supported by the National Natural Science Foundation of China numbered by 51772275 and the sponsor of the Science and Technical Development Program of Henan Province (142300410099, 172102210008).

语种：英文

外文关键词：ZTA ceramics; gehlenite crystal phase; mechanical properties; microstructure; blast furnace slag(BFS)

摘要：ZTA ceramics with Blast furnace slag (BFS) powders as sintering additives were prepared by pressureless sintering. Chemical composition, physical characteristic, thermal characteristic and microstructure of BFS powders and ZTA ceramics were studied by x-ray Fluorescence Spectrometry (XRF), x-ray diffraction (XRD), differential scanning calorimetry (DSC), laser particle size analyzer and Scanning Electron Microscope (SEM), respectively. The results show that the main constitution of BFS powders is glass phase (SiO2, CaO, and MgO), which is traditional sintering additive for ceramics. Besides, gehlenite crystal phase can be obtained when BFS powders are calcined at 850 similar to 950 degrees C. When ZTA samples with 5 wt% BFS were sintered at 1550 degrees C for 2 h and soaked for 1 h at 950 degrees C during the cooling process, its relative density reached to 97%, bending strength is 375 MPa, which is much higher than that of mono-phase ZTA, and fracture toughness is 3.97 MPa.m(1/2). The results of XRD and SEM demonstrate that the micro crystal phase of gehlenite exists at the grain boundaries, which can improve the mechanical properties of ZTA ceramics. The addition of BFS powders can not only reduce the sintering temperature, but also improve the strength of the ceramics.