Effect of processing parameters on ultrafine silver particles prepared by spray-pyrolysis of AgNO<sub>3</sub> solution

YI Yu; SHI Jing; GUO Xueyi

doi:10.13264/j.cnki.ysjskx.2015.03.002

Volume 6 Issue 3

Jun. 2015

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Nonferrous Metals Science and Engineering > 2015 > 6(3): 6-15. > DOI: 10.13264/j.cnki.ysjskx.2015.03.002

YI Yu, SHI Jing, GUO Xueyi. Effect of processing parameters on ultrafine silver particles prepared by spray-pyrolysis of AgNO₃ solution[J]. Nonferrous Metals Science and Engineering, 2015, 6(3): 6-15. DOI: 10.13264/j.cnki.ysjskx.2015.03.002

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Effect of processing parameters on ultrafine silver particles prepared by spray-pyrolysis of AgNO₃ solution

YI Yu^{1, 2,},
SHI Jing^{1, 2},
GUO Xueyi^{1, 2, ,}

1.
School of Metallurgy and Environment, Central South University, Changsha 410083, China
2.
Cleaner Metallurgical Engineering Research Center of Nonferrous Metal Industry of China, Changsha 410083, China

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Received Date: March 24, 2015
Published Date: June 29, 2015

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The ultrafine silver powders were prepared by solution spray-pyrolysis with citric acid as additive in air atmosphere using AgNO₃ solution as raw materials. The properties of the ultrafine silver powders were characterized with scanning electron microscope (SEM), laser particle size analyzer, tap density tester and X-ray diffraction (XRD). The effects of reaction temperature, concentration and pH value of AgNO₃ solutions, compressed air flow and amount of citric acid on the morphology, tap density and average particle size of silver powders, were investigated systematically. The optimum conditions are determined as follows: temperature of 700 ℃, solution concentration of 2.0 mol/L, n(C₆H₆O₇)/n(AgNO₃) of 2.5 %, compressed air flow of 1.0 m³/h, solution pH value of 6.0. Under these conditions, the pure and dispersive spherical silver particles with smooth surface, average particle size of 3.16 μm and tap density of 4.24 g/cm³, can be prepared.
- silver powder,
- AgNO₃,
- spraying,
- thermolysis

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