Part I. Chemical processing of barium titanates. Part II. The chemistry of sulfotitanic acids, molecular analogues of sulfated metal oxide superacids

Part I. Several new barium titanium alkoxides, $\rm BaTi(OPh)\sb6\cdot2DMF$ (BTP), (Ba(HOCH$\sb2$-CH\rm\sb2OH)\sb4(H\sb2O)\rbrack\lbrack Ti(OCH\sb2CH\sb2O)\sb3\rbrack (BTG), BaTi\sb2)O(OBz)\sb8\cdotBzOH (Bz = benzyl) and \rm BaTi\sb4(OR)\sb{18} (R = Et, \sp{n}Pr), have been synthesized and structurally characterized. The BTP complex, as a single-source precursor, is well-suited for the sol-gel processing of BaTiO$\sb3$ in the form of gels, powders, and thin films. The BTG complex is a viable precursor for the processing of BaTiO$\sb3$ powders by thermal decomposition. Calcination of BTG at 600$\sp\circ$C yields submicron BaTiO$\sb3$ powders, which can be sintered into BaTiO$\sb3$ ceramics at 1300$\sp\circ$C. Gels and xerogels have been prepared from the complexes $\rm BaTi\sb2O(OBz)\sb8\cdot$BzOH and $\rm BaTi\sb4(OEt)\sb{18}.$ Heat treatment of the xerogels derived from $\rm BaTi\sb2O(OBz)\sb8\cdot$BzOH at 1100$\sp\circ$C yields $\rm BaTi\sb2O\sb5$ and a small amount of $\rm BaTiO\sb3.$ Phase pure BaTi$\rm 4O\sb9$ is obtained after firing the xerogels prepared from $\rm BaTi\sb4(OEt)\sb{18}$ at temperatures above 1200$\sp\circ$C.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Chemistry

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Liang, Shurong

Contributors dc:contributor

• Klemperer, Walter G.

• Chemistry, Inorganic
• Engineering, Materials Science

Statement dc:rights

• Copyright 1996 Liang, Shurong

Language dc:language

eng

Identifier

9780591088496
AAI9702583
(UMI)AAI9702583

OAI record oai:identifier

https://www.ideals.illinois.edu/oai-pmh?verb=GetRecord&metadataPrefix=etdms&identifier=oai%3Awww.ideals.illinois.edu%3A2142%2F23170