Fluoride salt coated magnesium aluminate

申请公布号：

US7211325(B2)

申请号：

US20050094544

申请日期：

2005.03.24

申请公布日期：

2007.05.01

申请人：

THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY

发明人：

VILLALOBOS GUOLLERMO R.;SANGHERA JASBINDER S.;BAYYA SHYAM;AGGARWAL ISHWAR D.

分类号：

B32B5/16

主分类号：

B32B5/16

摘要：

A particle having a magnesium aluminate core and a fluoride salt coating on the core. The particle has been heated in an oxidizing atmosphere to a temperature in the range of about 400° C. to about 750° C. A method of making a particle by mixing a magnesium aluminate core with a solution of a fluoride salt in a solvent to form a slurry and spraying the slurry into a drying column. The slurry enters the column as an aerosol under thermal conditions that avoid boiling the solvent. The thermal conditions in the column evaporate the solvent as the aerosol moves through the column to form a coating of the fluoride salt on the core while substantially avoiding spalling.