title: Lowered phase transition temperature and excellent solar heat shielding properties of well-crystallized VO2by W doping.
abstract: Monoclinic VO2(M) is a key material for energy-efficient smart window applications. Fine crystalline VO2particles with an ambient phase transition temperature are urgently required to achieve excellent properties including high luminous transmittance and solar heat shielding ability. Moreover, the anti-oxidation ability is regarded as a significant factor which determines the lifetime of VO2-based products. In this paper, well-crystallized W-doped VO2with low phase transition temperature, excellent solar heat shielding ability and considerable anti-oxidation ability was synthesized by a solid-state reaction process. The phase transition temperature was reduced from 67.3 °C to 10.8 °C at 2.0% W doping with an efficiency of -28.1 °C per at%. Importantly, an excellent balance between the phase transition temperature and the latent heat was obtained at high doping levels (1.5-2.0%). Furthermore, W-doped VO2particles exhibited a significantly longer exposure time (more than 5 h) at 300 °C in air than the previously reported 2 h in the literature, and the corresponding derived composite foils showed excellent luminous transmittance and solar heat shielding properties (Tlum= 49.9% and Tsol= 44.8% for 2.0% W doping).
authors.affiliation: Shanghai Institute of Ceramics (SIC), Chinese Academy of Sciences (CAS), No. 1295 Dingxi Road, Changning District, Shanghai, 200050, China and University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Shen
authors.affiliation: Shanghai Institute of Ceramics (SIC), Chinese Academy of Sciences (CAS), No. 1295 Dingxi Road, Changning District, Shanghai, 200050, China and University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Bingrong
authors.initials: B
authors.lastname: Dong
authors.affiliation: School of Materials Science and Engineering, Shanghai University, No. 99 Shangda Road, Shanghai, 200444, China. yfgao@shu.edu.cn.
authors.forename: Chuanxiang
authors.initials: C
authors.lastname: Cao
authors.affiliation: School of Materials Science and Engineering, Shanghai University, No. 99 Shangda Road, Shanghai, 200444, China. yfgao@shu.edu.cn.
authors.forename: Zhang
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Shanghai Institute of Ceramics (SIC), Chinese Academy of Sciences (CAS), No. 1295 Dingxi Road, Changning District, Shanghai, 200050, China.
authors.forename: Jianjun
authors.initials: J
authors.lastname: Liu
authors.affiliation: Shanghai Institute of Ceramics (SIC), Chinese Academy of Sciences (CAS), No. 1295 Dingxi Road, Changning District, Shanghai, 200050, China and School of Materials Science and Engineering, Shanghai University, No. 99 Shangda Road, Shanghai, 200444, China. yfgao@shu.edu.cn.
authors.forename: Hongjie
authors.initials: H
authors.lastname: Luo
authors.affiliation: School of Materials Science and Engineering, Shanghai University, No. 99 Shangda Road, Shanghai, 200444, China. yfgao@shu.edu.cn and Huaiyin Institute of Technology, Huaian 223003, China.
authors.forename: Yanfeng
authors.initials: Y
authors.lastname: Gao