Synthesis of bismuth/strontium/calcium/copper and yttrium/barium/copper oxide systems from malonate precursors

Richardson, R. T.; Veitch, C. D.

doi:10.1007/bf00368913

Cited by 4 publications

(1 citation statement)

References 12 publications

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“…It was observed that hydroxide precipitation, which led to the formation of a colloidal solution, could be prepared by adding either N(CH 3 ) 4 OH [165] or Ba(OH) 2 [166] or ammonia [167] to the metal nitrate solutions. The synthesis of YBCO superconductors using a solution of malonate salts in glycerol/malonic acid polyester was also studied by Richardson et al [168].…”

Section: (C) Sol-gel Processmentioning

confidence: 99%

A review on the synthesis of Y–Ba–Cu-oxide powder

Pathak¹,

Mishra²

2005

Supercond. Sci. Technol.

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The preparation of Y–Ba–Cu-oxide (YBCO) powder by various techniques is critically reviewed and the synthesis of ultrafine superconducting YBa2Cu3Ox(123) powders is specially emphasized. The fine powder has assumed a large importance, requiring the minimization of processing parameters (time and temperature) during calcination, homogenization and sintering to avoid the problems of evaporation of the constituent oxides. From the voluminous research activities on YBCO it is known that by adopting any preparation technique the superconducting transition temperature (Tc) value of ≈92 K could be achieved in the bulk samples, thus in this review the Tc values are not emphasized. Also, the other transport properties such as critical current densities (Jc) and magnetic properties are not discussed, since these properties are mainly controlled by many other parameters related to the weak link across the grain boundaries of the specimens, and a very little role is played by the synthetic procedure. The weak links across the grain boundaries are known to be the cause for the poor Jc values in bulk specimens and those weak links are observed due to the presence of impurities at the grain boundaries, misorientation of grains and oxygenation of the samples. By selecting the proper synthetic procedure, only the impurity problem can be solved, and to remove the other problems, a proper fabrication method needs to be adopted. This review will guide the new researcher to find the appropriate technique to synthesize good quality YBCO powder.

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Section: (C) Sol-gel Processmentioning

confidence: 99%

A review on the synthesis of Y–Ba–Cu-oxide powder

Pathak¹,

Mishra²

2005

Supercond. Sci. Technol.

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Patterning polymer metal precursors for high temperature superconducting Bi-Sr-Ca-Cu-O-films

1996

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Influence of Complexing Agents and pH on Yttrium−Iron Garnet Synthesized by the Sol−Gel Method

1997

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A systematic study of the sol−gel technique for the synthesis of Y3Fe5O12 is presented, using two different complexing agents (citric acid and malonic acid) and adding two different alcohols (ethylene glycol and glycerol). The influence of the pH value of the initial solution on the final product is also studied. Yttrium−iron garnet YIG is obtained from the gels by heating above 650 °C in air atmosphere. Samples are characterized by X-ray powder diffraction and IR spectroscopy. The crystallite size and the lattice parameter are also determined, and their dependence on the synthesis conditions is studied.

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Synthesis of bismuth/strontium/calcium/copper and yttrium/barium/copper oxide systems from malonate precursors

Cited by 4 publications

References 12 publications

A review on the synthesis of Y–Ba–Cu-oxide powder

A review on the synthesis of Y–Ba–Cu-oxide powder

Patterning polymer metal precursors for high temperature superconducting Bi-Sr-Ca-Cu-O-films

Influence of Complexing Agents and pH on Yttrium−Iron Garnet Synthesized by the Sol−Gel Method

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