Supercritical antisolvent precipitation of nanoparticles of superconductor precursors

被引：139

作者：

Reverchon, E

Della Porta, C

Di Trolio, A

Pace, S

机构：

[1] Univ Salerno, Dipartimento Ingn Chim & Alimentare, I-84084 Fisciano, SA, Italy

[2] Univ Salerno, Dipartimento Fis, I-84081 Baronissi, SA, Italy

[3] CNR, Area Ric, Ist Mat Speciali, I-85050 Tito, Pz, Italy

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1998年 / 37卷 / 03期

关键词：

D O I：

10.1021/ie970510a

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Supercritical antisolvent precipitation (SAS) is based on the fast dissolution of a liquid solution in a supercritical fluid. This technique has been tested to produce nanoparticles of yttrium, samarium, and neodymium acetates to be used as precursors of high-temperature superconductors. Particles of various morphologies were produced at different expansion levels of the liquid solution. Nanoparticles down to about 100 nm were obtained at very large expansion levels, whereas very large aggregates (balloons) with the diameter of several microns were produced at intermediate expansion levels. The influence of several process parameters on particle diameter and particle size distribution was studied. Among SAS process parameters, pressure, temperature, concentration of the liquid solution, and different liquid solvents were tested.

引用

页码：952 / 958

页数：7