Journal ArticleDOI
Application of metal alkoxides in the synthesis of oxides
Reads0
Chats0
TLDR
In this article, it was shown that considerable attention in sol-gel chemistry of oxides should be paid to decomposition of M(OR)n with elimination of ether and formation of oxoalkoxides, containing M-O-M' bonds.Abstract:
Powders and thin films of the following simple and complex oxides have been obtained from metal alkoxides: MIITiO3 (M= Mg, Ca-Ba), MM1/3B2/3O3 (M= Sr, Ba, M' = Mg-Zn; B= Nb, Ta); MNbO3(M= Li, Na); ZrTiO4; PbTiO3; PZT, PLZT-materials; M2BO4 (M= Li, Na; B= Mo, W), Bi2BO6(B= Mo, W); LixWO3, WO3, MoO3, Bi2O3-WO3(solid solutions), YFeO3, Y3Fe5O12; YBa2Cu3O7-; Bi2Sr2CaCu2Ox; Bi2Sr2Ca2Cu3Ox. For synthesis of metal alkoxides and solutions containing two or more elements electrochemical technique (the anodic dissolution of metals in alcohols) has been used. Analysis of different examples emphasises that considerable attention in sol-gel chemistry of oxides should be paid to decomposition of M(OR)n with elimination of ether and formation of oxoalkoxides, containing M-O-M' bonds-the basis of future oxide phases.read more
Citations
More filters
Proceedings ArticleDOI
Industrial applications
TL;DR: This first technical session is further developing the technological dimensions of technology transfer, with three illustrations of successful and representative industrial applications of embedded autonomy in spacecraft applications, advanced avionics solutions for satellite communication and component hybridization for navigation.
Journal ArticleDOI
Heterometallic alkoxides and oxoalkoxides as intermediates in chemical routes to mixed metal oxides
TL;DR: In this article, a variety of oxo or non-oxo mixed-metal acetatoalkoxides have been characterized in the solid (X-ray on single crystals) as well as in solution (FT-IR, multinuclear NMR).
Journal ArticleDOI
Precursor directed synthesis – “molecular” mechanisms in the Soft Chemistry approaches and their use for template-free synthesis of metal, metal oxide and metal chalcogenide nanoparticles and nanostructures
TL;DR: This review provides an insight into the common reaction mechanisms in Soft Chemistry processes involved in nucleation, growth and aggregation of metal, metal oxide and chalcogenide nanoparticles starting from metal-organic precursors and demonstrates how mastering the precursor chemistry permits us to control the chemical and phase composition, crystallinity, morphology, porosity and surface characteristics of produced nanomaterials.
Journal ArticleDOI
Ferroelectric ceramics by sol–gel methods and applications: a review
TL;DR: In this paper, the basic principles governing ferroelectricity and various materials which exhibit these properties are described. And some important applications of the microstructure examination as well as powerful techniques are briefly discussed.
Journal ArticleDOI
Precursor and solvent effects in the nonhydrolytic synthesis of complex oxide nanoparticles for bioimaging applications by the ether elimination (Bradley) reaction.
Robert Pazik,Renata Tekoriute,Sebastian Håkansson,R. J. Wiglusz,Wieslaw Strek,Gulaim A. Seisenbaeva,Yurii K. Gun'ko,Vadim G. Kessler +7 more
TL;DR: Investigation of the solvent and alkoxide precursor effect on the nonhydrolytic sol-gel synthesis of oxide nanoparticles by means of an ether elimination (Bradley) reaction indicates that the best crystallinity of the resulting oxide particles is achieved on application of aprotic ketone solvents and of smallest possible alkoxide groups.
References
More filters
Journal ArticleDOI
Preparation of High-Purity Submicron Barium Titanate Powders
TL;DR: Simultaneous hydrolytic decomposition of barium bis isopropoxide and titanium tetrakis tertiary amyloxide was used to produce stoichiometric BaTiO3.
Journal ArticleDOI
Chemistry of yttrium triisopropoxide revisited. Characterization and crystal structure of Y5(.mu.5-O)(.mu.3-OPr-iso)4(.mu.2-OPr-iso)4(OPr-iso)5
Olivier Poncelet,William J. Sartain,Liliane G. Hubert-Pfalzgraf,Kirsten Folting,Kenneth G. Caulton +4 more
Journal ArticleDOI
Ferroelectrics of Ultrafine Particle Size: I, Synthesis of Titanate Powders of Ultrafine Particle Size
TL;DR: In this article, the authors synthesize high-purity ferroelectric titanate powders in controlled, narrow size distributions, with average particle diameters <1000 A, using solvent media of controlled polarity.
Journal ArticleDOI
Preparation and Characterization of Alkoxy-Derived SrZrO3 and SrTiO3
TL;DR: In this article, high-purity strontium, zirconium, and titanium alkoxides were synthesized and characterized as precursors for complex oxides.