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Liu X.,Jilin University | Zhang J.,Jilin University | Zhang G.,Jilin University | Jiang Z.,Jilin University | Jin D.,Jilin Weather Modification Office
Materials Research Bulletin | Year: 2011

A series of single β-phase nano-Ag1-xCuxI (x = 0-0.5) solid solutions powders were synthesized by wet-chemical-chelating reaction processing and citric acid used as complexing agent. The Ag 1-xCuxI powders were determined by X-ray diffraction and transmission electron microscopy. It was demonstrated that the crystalline size and lattice parameter of the Ag1-xCuxI powders decrease with an increase in the amount of CuI substitution. The copper in the lattice of the Ag1-xCuxI can effectively prevent the crystalline growth of the Ag1-xCuxI powders and citrate used in the Ag1-xCuxI powders synthesized process can accelerate single β-phase crystalline structure formation. © 2011 Elsevier Ltd. All rights reserved.


Zhang J.,Jilin University | Jin D.,Jilin Weather Modification Office | Zhao L.,Jilin University | Liu X.,Jilin University | And 3 more authors.
Advanced Powder Technology | Year: 2011

Nano-meter-sized silver iodide (n-AgI) powders were prepared by precipitation method at room temperature. The size, structure and specific surface area of the n-AgI powders were characterized by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscope and Brunner-Emmett-Teller, respectively. The n-AgI powders obtained have an average particle size of ∼90 nm, similar surface lattice structure with ice crystal (H2O) and larger specific surface area than conventional micro-meter-sized silver iodide (m-AgI) powders. The cloud chamber experiment revealed that the n-AgI powders exhibit higher ice nucleation efficiency and higher threshold temperature value than conventional m-AgI powders. © 2010 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.


Zhang J.,Jilin University | Jiang Z.,Jilin University | Jin D.,Jilin Weather Modification Office | Liu X.,Jilin University
Materials Science and Engineering B: Solid-State Materials for Advanced Technology | Year: 2010

A series of nano-Cr2-xAlxO3 (x = 0-1) solid solution powders were prepared by sol-gel-chelating processing with citrate-dispersant method. The crystalline structure and size of the Cr2-xAlxO3 powders were determined by X-ray diffraction and transmission electron microscopy. It was demonstrated that the crystalline size of the Cr2-xAlxO3 powders decreases from 33 nm to 13 nm with an increase in the amount of Al2O3 substitution. The aluminum in the lattice of the Cr2-xAlxO3 can effectively prevent the crystalline growth of the Cr2-xAlxO3 powders during calcining at higher temperature. © 2010 Elsevier B.V. All rights reserved.

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