Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing
Patent
1973-11-20
1977-03-01
Peters, G. O.
Chemistry of inorganic compounds
Silicon or compound thereof
Oxygen containing
106 41, 106288B, 264 15, 264 44, 264 59, 423592, 423608, 423617, 423618, 423628, 423633, C01B 3312, C04B 2104
Patent
active
040102424
ABSTRACT:
Oxide microspheres having a diameter in the 0.5 to 20 micron range are produced by forming a mixture of urea or melamine and formaldehyde in an aqueous sol containing colloidal oxide particles. Copolymerization of the organic constituents produces coacervation of the organic material into microparticles containing the inorganic material. The organic constituent can be burned out to form a powder of uniform-sized porous microparticles consisting of an interconnected array of inorganic colloidal particles separated by uniform-sized pores.
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Iler Ralph K.
McQueston Herbert J.
E. I. DuPont de Nemours and Company
Peters G. O.
Straub Gary P.
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