The decomposition of the oxalate precursor and the stability and reduction of the YBa2Cu4O8 superconductor studied by TG coupled with FTIR and by XRD

Mullens, J.; Vos, A.; Backer, A. De; Franco, D.; Yperman, J.; Poucke, L. C. Van

doi:10.1007/bf02546580

Cited by 31 publications

(8 citation statements)

References 9 publications

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“…Moreover, by adopting thermal decompositions on mixed oxalates, variety of other compounds can be synthesized. Barium titanate is a well known compound that can be easily decomposed from its oxalate phase and form solid solutions [7]. Among the metallic ions studied, Ba 2+ and Cd 2+ ions have attracted a great deal of interest because it has rather simple chemistry and coordination geometry [16,17].…”

Section: Introductionmentioning

confidence: 99%

“…Most oxalate compounds have shown to exhibit interesting applications such as precipitation agent [6], precursor for superconductive oxides [7], nano particles synthesis [8,9], magnetic and luminescent devices [10][11][12]. In addition, microporous oxalate materials have open-framework structure and are layered with honeycomb like apertures [13].…”

Section: Introductionmentioning

confidence: 99%

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Growth aspects of barium oxalate monohydrate single crystals in gel medium

Raj¹,

Jayanthi

Jothy

et al. 2008

Cryst. Res. Technol.

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Single crystals of barium oxalate monohydrate (BaC 2 O 4 .H 2 O, BOM) were grown in pure form by controlled diffusion of Ba 2+ using the gel technique at different temperatures. Starting from aqueous Ba 2+ chloride (BaCl 2 ) and acetic acid (C 2 H 2 O 4 ) in gel, this method offers a low-cost and an easiest alternative to other preparation methods for the production of barium oxalate bulky single crystals. The optimal conditions for the growth of BOM crystals in silica gel were found by investigating different growth parameters such as gel pH, gel aging and crystallization temperature. Irrespective of all such crystallization environments, growth rate of the crystals were initially less and then exhibited supersaturation effect leading to non-linearity. Gel aging and temperature has profound effect on nucleation density that resulted less number of crystals of maximum size in the gel matrix. Perfect single crystals were grown on gels of higher pH. The macropore morphology and porosity was controlled by changing age of the gel. It has been found that temperature has a fabulous effect in controlling the nucleation density by altering the supersaturation conditions for the formation of critical nuclei. The entire growth kinetics informed that the grown crystals were derived by the one dimensional diffusion controlled process.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Growth aspects of barium oxalate monohydrate single crystals in gel medium

Raj¹,

Jayanthi

Jothy

et al. 2008

Cryst. Res. Technol.

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“…The wave band at 1576 cm À1 is due to the stretching vibrations of the aromatic ring (C Ar C Ar ). Furthermore, the peak at 743 cm À1 is characteristic for mono substituted benzene [48][49][50][51][52][53].…”

Section: Tg-ftir Analysismentioning

confidence: 99%

Structural and physicochemical properties of 3-(3-carboxyphenylaminomethylene)-2-methoxychroman-4-one

Dziewulska-Kułaczkowska

Bartyzel

2013

Journal of Molecular Structure

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“…Oxalates play a vital role in increasing the hardness of barium titanate and to achieve decreased layer thickness in multilayer ceramic capacitors (Bera and Sarkar 2003). They also have good ionic conductivity (George et al 1990), exhibit applications as precipitation agent (Mullens et al 1993) as well as used in nano particle synthesis, in magnetic and luminescent devices (Vos et al 1992;Ye et al 1999;Ahmad et al 2004). Synthesis of rare earth oxalates (Bhat et al 1995;Jayakumari et al 1995;Raju et al 1998) and transition metal oxalates has been * Author for correspondence (paresh10dalal@gmail.com) carried out using gel method (Arora and Tony 1981).…”

Section: Introductionmentioning

confidence: 99%

Growth of strontium oxalate crystals in agar–agar gel

Dalal¹,

Saraf²

2011

Bull Mater Sci

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Single crystals of strontium oxalate have been grown by using strontium chloride and oxalic acid in agar-agar gel media at ambient temperature. Different methods for growing crystals were adopted. The optimum conditions were employed in each method by varying concentration of gel and reactants, and gel setting time etc. Transparent prismatic bi-pyramidal platy-shaped and spherulite crystals were obtained in various methods. The grown crystals were characterized with the help of FT-IR studies and monoclinic system of crystals were supported with lattice parameters a = 9·67628 Å, b = 6·7175 Å, c = 8·6812 Å, β = 113·566 • , and V = 521·84 Å 3 calculated from X-ray diffractogram.

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The decomposition of the oxalate precursor and the stability and reduction of the YBa2Cu4O8 superconductor studied by TG coupled with FTIR and by XRD

Cited by 31 publications

References 9 publications

Growth aspects of barium oxalate monohydrate single crystals in gel medium

Growth aspects of barium oxalate monohydrate single crystals in gel medium

Structural and physicochemical properties of 3-(3-carboxyphenylaminomethylene)-2-methoxychroman-4-one

Growth of strontium oxalate crystals in agar–agar gel

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