E.i. Dupont De Nemours and Company

E. I. Du Pont Nemours and Co.

Eric Lee Brantley

Kurt Richard Mikeska

Howard David Glicksman

Brian J Laughlin

James J Krajewski

John T Chaplinsky

Lawrence V Triboletti

Alan Roger Eaton

Stephen Claude De La Veaux

Disclosed is a plurality of glass-crystalline particles, wherein at least a portion of the glass-crystalline particles comprise a glass component and a crystalline component, and wherein the crystalline component comprises one or more metal oxides wherein the metal is selected from the group consisting of: Zn, Ca, Sr, Mg, Ba, and mixtures thereof.

Glass-crystalline particle powders including a glass component and a crystalline component

Disclosed is a process for the manufacture of glass-crystalline particles comprising a glass component and a crystalline component comprising the steps of:

Methods of making glass-crystalline particles including a glass component and a crystalline component

This invention relates to a supersonic center-feed nozzle system within the feed-inlet tube of a fluid-energy mill used for grinding particulate material such as titanium dioxide. Particularly, in the feed-inlet tube of the present invention, particulate material is introduced into the supersonic feed jet of primary grinding fluid in almost a perpendicular fashion, with the supersonic nozzle installed in the center of the particulate material core, imparting momentum to the particulate material. The momentum entrains the particulate into the main grinding chamber of the feed-inlet tube. In the main grinding chamber of the feed-inlet tube, a secondary stream of grinding fluid, introduced annularly, constricts the primary jet's divergent flow, enabling a higher turbulent mixing of the grinding fluids and the particulate material.

Center-feed nozzle in a contained cylindrical feed-inlet tube for improved fluid-energy mill grinding efficiency

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Wilmington, DE, United States of America

Eric Lee Brantley