Gel and powder making

Details Gel and powder making Gel and powder making

2003-04-08

2008-10-21

Zimmer, Marc S (Department: 1796)

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

C423S608000, C423S624000, C423S625000, C423S632000

Reexamination Certificate

active

07438882

ABSTRACT:
A method of forming a gel and/or powder of a metallic oxide, metalloid oxide and/or a mixed oxide or resin thereof from one or more respective organometallic liquid precursor(s) and/or organometalloid liquid precursor(s) by oxidatively treating said liquid in a non-thermal equilibrium plasma discharge and/or an ionised gas stream resulting therefrom and collecting the resulting product. The non-thermal equilibrium plasma is preferably atmospheric plasma glow discharge, continuous low pressure glow discharge plasma, low pressure pulse plasma or direct barrier discharge. The metallic oxides this invention particularly relates to are those in columns 3aand 4aof the periodic table namely, aluminium, gallium, indium, tin and lead and the transition metals. The metalloids may be selected from boron, silicon, germanium, arsenic, antimony and tellurium. Preferred metalloid oxide products made according to the process of the present invention are in particular oxides of silicon including silicone resins and the like, boron, antimony and germanium.

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Karthikeyan, J. et al, “Plasma Spray Synthesis of Nanomaterial Powders and Deposits”, Mateirals Science & Engineering A Structural Materials: Properties Microstructure and Processing, Nov. 15, 1997, Elsevier, Switzerland, vol. A238, No. 2, pp. 275-286, XP002250516.
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