公开(公告)号：WO1995032061A1

公开(公告)日：1995-11-30

申请号：PCT/US1995006394

申请日：1995-05-23

Applicant: WASHINGTON UNIVERSITY

Inventor： WASHINGTON UNIVERSITY ,  AXLEBAUM, Richard, L. ,  DUFAUX, Douglas, P. ,  ROSEN, Lee, Jonathan

IPC: B05D07/00

CPC classification number: B82Y30/00 ,  B01J2/003 ,  B22F1/02 ,  B22F9/28 ,  C01B13/22 ,  C01B35/04 ,  C01G23/07 ,  C01P2002/72 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/80 ,  C23C16/30 ,  C23C16/453 ,  C23C16/56

Abstract: A method and apparatus for reacting sodium vapor with gaseous chlorides in a flame to produce nanoscale particles of un-oxidized metals, composites and ceramics. The flame is operated under conditions which lead to condensation of a NaCl by-product onto the particles. The condensate encapsulates the particles and aids in controlling desired particle size and preventing undesirable agglomeration among the particles during synthesis. Following synthesis, oxidation of the particles is inhibited by the encapsulation, and handling character of the products is greatly enhanced. Electron microscopy has revealed that synthesized products are composed of discrete nanoparticles in a NaCl matrix. The NaCl encapsulate has been effectively removed from the particles by both washing and known sublimation technique at 800 DEG C under low pressure.

Abstract translation: 一种用于在火焰中使钠蒸汽与气态氯化物反应以产生未氧化金属，复合材料和陶瓷的纳米级颗粒的方法和装置。 火焰在导致NaCl副产物冷凝到颗粒上的条件下运行。 冷凝物包封颗粒并有助于控制期望的颗粒尺寸并防止在合成过程中颗粒之间的不期望的团聚。 合成后，通过封装抑制了颗粒的氧化，大大提高了产品的处理性能。 电子显微镜已经显示合成产物由NaCl基质中的离散纳米颗粒组成。 通过洗涤和已知的升华技术在800℃低压下，已经将有机物从颗粒中去除。