Precursors and processes for making metal oxides
AssigneeSymetrix Corporation
InventorsMichael C. Scott, Carlos A. Paz de Araujo, Larry D. McMillan
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Abstract
A precursor is made by mixing a metal alkoxycarboxylate-containing liquid with a 2-ethylhexanoic acid in an effective amount for shelf-stabilizing said liquid by substituting 2-ethylhexanoate ligands for alkoxide ligands, thereby forming a mixture, and heating said mixture to substitute said carboxylate ligands for said alkoxide ligands. Specficially, a barium strontium titanate precursor and a strontium bismuth tantalate precursor are made by combining polyoxyalkylated metal moieties to form a liquid solution in which the metal atoms bond with an oxygen atom in a ligand selected from a ligand group consisting of alkoxides and carboxylates, then then heating the liquid solution.
Claims17
A method of making a precursor for fabricating a metal oxide, said method comprising the steps of:
- mixing a metal alkoxycarboxylate-containing liquid with a 2-ethylhexanoic acid in an effective amount for shelf-stabilizing said liquid by substituting 2-ethylhexanoate ligands for alkoxide ligands, thereby forming a mixture;
- and
- heating said mixture to so substitute said carboxylate ligands for said alkoxide ligands.
A method of making a barium strontium titanate precursor, said method comprising the steps of:
- combining a polyoxyalkylated barium moiety, a polyoxyalkylate strontium moiety, and a polyoxyalkylated titanium moiety to form a liquid solution,
- each of said respective moieties having a formula in which corresponding barium, strontium, and titanium atoms bond with an oxygen atom in a ligand selected from a ligand group consisting of alkoxides and carboxylates;
- and heating said liquid solution.
A method of making a strontium bismuth tantalate precursor, said method comprising the steps of:
- combining a polyoxyalkylated strontium moiety, a polyoxyalkylated bismuth moiety, and a polyoxyalkylated tantalum moiety to form a liquid solution;
- each of said respective moieties having a formula in which corresponding strontium, bismuth, and tantalum atoms bond with an oxygen atom in a ligand selected from a ligand group consisting of alkoxides and carboxylates;
- and heating said liquid solution.
Dependencies are inferred from the claim text.