Controllable morphology, size and inner structure of Ru particles prepared by spray-pyrolysis. (January 2019)

• Record Type: Journal Article
• Authors: Zhang, uhang; Yi, Wei; Xin, Zena; Li, Jigang; Guo, Lei; An, Nihong; Wang, Linshan; Niu, Dun; Yao, Chensiqi
• Is Part Of: International journal of refractory metals & hard materials. Volume 78(2019)
• Page Start: 326
• Page End: 331
• Publication Date: 2019-01
• Subjects: Ru particles -- BET surface area -- Spray drying -- Sintering -- Sintered temperature -- Thermal decomposed mechanisms; Heat resistant alloys -- Periodicals; Refractory materials -- Periodicals; Metallography -- Periodicals; Alliages réfractaires -- Périodiques; Matériaux réfractaires -- Périodiques; Métallographie -- Périodiques; Heat resistant alloys; Metallography; Refractory materials; Periodicals; Electronic journals; 669.73
• DOI: 10.1016/j.ijrmhm.2018.10.010
• Languages: English
• ISSNs: 0263-4368

Abstract

Abstract: Micro-spherical Ru particles with varied Brunauer-Emmett-Teller (BET) surface area (from 0.2 m 2 /g to 56 m 2 /g) were synthesized from (NH4 )2 RuCl6 solution visa spray-pyrolysis methods. The morphology and size of as-synthesized Ru particles were controlled by the dry spraying treatment, while the inner structure of Ru particles was adjusted by the sintering process. The influences of sintered temperature on the inner structure of Ru particles were investigated. The microstructural transformation mechanisms of spray dried (NH4 )2 RuCl6 particles during thermal decomposition were revealed. The as-synthesized Ru powder with low BET surface area (0.1963 m 2 /g) shows good sintering property, while the Ru powder with high BET surface area (56.2313 m 2 /g) shows excellent sulfur capacity. The powder technology can be applied to regulate the morphology, size and inner structure of particles. Graphical abstract: Highlights: Micro-spherical Ru particles with varied BET surface area were synthesized. Sintered temperature influences the inner structure of as-prepared Ru particles. Inner structure of Ru particles with low BET surface area was very dense. High BET surface area Ru powder was composed by extremely porous particles. Thermal decomposed mechanisms of (NH4 )2 RuCl6 particles were revealed.