A THEORETICAL STUDY OF THE APPLICATION OF TIME-RESOLVED X-RAY SCATTERING TO SOLID STATE REACTION KIN

• 作 者: ThomasL.Groy ShengH.Lin SpencerK.Porter RobertB.VonDreele LeRoyEyring
• 机 构: Department of Chemistry Arizona State.University Tempe Arizona 85287,U.S.A.,Department of Chemistry
• 出 处: 分子科学与化学研究
• 发表日期: 1982年04期
• 关键词: kinetics reactant nucleation centers SOLID filling crystallite 日卜 struc radius

THE purpose of this paper is to develop a theory of time-resolvedX-ray diffraction that can be used to probe solid state reactionkinetics.X-ray powder diffraction profiles for two hypotheticalsolid state reactions wore calculated using simple first-orderkinetics and nucleation and growth kinetics as models.Use wasmade of the effects on peak shape of particle size and inclusionof product particles in the reactant matrix.Applying this typeof analysis should provide not only kinetics information butalso growth rates of product particles,critical size of nuclea-tion centers,particle size of product,particle shapes,andinitial concentration of nuoleation centers.

THE purpose of this paper is to develop a theory of time-resolved X-ray diffraction that can be used to probe solid state reaction kinetics. X- ray powder diffraction profiles for two hypotheticalsolid state reactions wore calculated using simple first-order kinetics and nucleation and growth kinetics as models. Use was made of the effects on peak shape of particle size and inclusionof product particles in the reactant matrix. Applying this typeof analysis should provide not only kinetics information butalso growth rates of product particles, critical size of nuclea-tion centers, particle size of product, particle shapes, and initial concentration of nuoleation centers.