Critical current in electrophoretically deposited thick films of YBCO superconductor

Bhattacharya, Dipten; Roy, S. N.; Basu, Rajendra Nath; Sharma, Abhijit; Maiti, Himadri Sekhar

doi:10.1016/0167-577x(93)90204-b

Cited by 20 publications

(5 citation statements)

References 15 publications

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“…Biomateriales [65] B. FERRARI Y R. MORENO Ti-6Al-4V (5cm x 1cm), principalmente a partir de medios org ‡nicos [61,62], o bien a partir de disoluciones de polvo de fosfato de calcio trib ‡sico ( Ca 10 (PO 4 ) 6 (OH) 2 ) en una disoluci-n acuosa de NaCl 1M [63].…”

Section: Semiconductoresunclassified

“…En la misma l'nea, entre los materiales electrocer ‡micos procesados por EPD m ‡s conocidos se encuentran los supercondutores del sistema YBaCuO, aunque tambiŽn se procesan por esta tŽcnica materiales como el Titanato de Bario, PZT, semiconductores... [64][65][66][67][68][69], algunos de los cuales se han obtenido tambiŽn a partir de suspensiones en medios acuosos [68].…”

Section: Semiconductoresunclassified

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Conformado de materiales cerámicos por electroforesis en medios acuosos

Ferrari¹,

Moreno²

1998

Bol. Soc. Esp. Ceram. Vidr.

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La deposici-n electroforŽtica es un proceso de conformado particularmente sencillo en el que, al hacer pasar una corriente a travŽs de una suspensi-n coloidal o una disoluci-n, se obtienen recubrimientos sobre materiales conductores. La mayor parte de los materiales org ‡nicos y minerales pueden ser procesados por electrodeposici-n, siendo la mayor dificultad la selecci-n del veh'culo l'quido y el ajuste de las condiciones experimentales al sistema seleccionado. En el conformado por v'a l'quida el Žxito del proceso radica en la preparaci-n de suspensiones estables de determinadas caracter'sticas elŽctricas. En este sentido el uso de veh'culos org ‡nicos presenta grandes ventajas, ya que evitan en gran medida los procesos electrol'ticos que tienen lugar en el entorno del electrodo, y que por tanto afectan a la homogeneidad y posible contaminaci-n del recubrimiento. No obstante, el uso de org ‡nicos supone el encarecimiento de un proceso que se caracteriza por sus ventajas econ-micas y ecol--gicas. Por ello, los procesos de electroforesis a partir de medios acuosos, est ‡n recibiendo una creciente atenci-n dadas las enormes posibilidades para su implantaci-n en ciclos de producci-n de una amplia gama de materiales, como de hecho ocurre en la obtenci-n de recubrimientos de arcillas y esmaltes. En este trabajo se lleva a cabo una revisi-n de la fisicoqu'mica del proceso as' como de sus posibilidades de aplicaci-n en la fabricaci-n de productos cer ‡micos y v'treos en medio acuoso. Palabras clave: Deposici-n, Electroforesis, Suspensiones, Recubrimientos. Electrophoretic forming of ceramics in aqueous mediaElectrophoretic deposition is a particularly easy forming technique in which coatings onto conducting electrodes are obtained after applying a dc electric field to a colloidal suspension or solution. Most organic materials and minerals can be deposited, being the biggest difficulty the selection of the organic vehicle and the adjustment of the experimental conditions. In wet forming processes, the success is determined by the preparation of stable suspensions with the required electrical properties. In this sense, the use of organics presents important advantages, since avoid electrolityc processes in the vicinity of electrodes, which highly affect the homogeneity and contamination of the coating. However, the use of organics increases the costs of a process characterized for its economical and environmental advantages. This is the reason why aqueous electrophoresis is receiving an increasing attention due to the great possibilities to be considered for production cycles for a broad variety of materials, as already occurs in the case of clays and enamels. In this work, a review of the physical chemistry of the process is made, and possible applications in ceramics and glasses manufacturing are evaluated. Key words: Deposition, Electrophoresis, Suspensions, Coatings INTRODUCCIîNEl conformado por deposici-n electroforŽtica, o electrodeposici-n (EPD), se enmarca dentro de los mŽtodos de conformado por v'a hoemeda, en l...

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Section: Semiconductoresunclassified

Conformado de materiales cerámicos por electroforesis en medios acuosos

Ferrari¹,

Moreno²

1998

Bol. Soc. Esp. Ceram. Vidr.

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“…Battacharya et al [31] have used electrophoretic deposition to deposit films of YBCO on silver and have observed extensive grain growth and recrystallization. They also observed a thickness dependence for the critical current density (J c ) with a J c of 450 A cm −2 (77 K, H = 0) for films 65 µm thick and J c > 4000 A cm −2 for films 3 µm thick.…”

Section: Metals Used As Thick-film Substratesmentioning

confidence: 99%

High-temperature superconducting thick films

Alford

Penn

Button

1997

Supercond. Sci. Technol.

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High-temperature superconducting (HTS) thick films have undergone a period of rapid progress since their discovery in 1986. In this review thick-film materials are described with special reference to their processing, their properties and the development of devices. The devices include HTS magnetic shields, resonators for microwave filters, antennas and wire. The translation of science into applications has taken place in a relatively short time and already impressive performance is seen in HTS prototype devices.

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“…Indeed, it is well-established that critical current density depends drastically on the quality of the inter-grain links. Similarly, Bhattacharya et al [17] concluded to a dimensional dependence of J c due to microstructural effects. More investigations on this issue have to be pursued.…”

Section: Thick Films Deposition and Characterizationmentioning

confidence: 99%

Preparation of YBa2Cu3O7-x superconducting thick films by the electrophoretic deposition method

et al. 2006

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YBa 2 Cu 3 O 7-x thick films have been realised by the Electrophoretic Deposition method (EPD). The influence of several parameters (powder and iodine concentrations in the suspension, applied voltage and deposition time) on the EPD process has been studied by measuring the conductivity of the suspension and the amount of YBa 2 Cu 3 O 7-x particles deposited on the electrode. Superconducting coatings onto silver substrates have been produced by a multilayer process during different deposition times. The highest critical current density value of these coatings measured by the four-point probe method is about 10 3 A/cm 2 (77 K), in a suitable range for magnetic shielding applications.

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Critical current in electrophoretically deposited thick films of YBCO superconductor

Cited by 20 publications

References 15 publications

Conformado de materiales cerámicos por electroforesis en medios acuosos

Conformado de materiales cerámicos por electroforesis en medios acuosos

High-temperature superconducting thick films

Preparation of YBa2Cu3O7-x superconducting thick films by the electrophoretic deposition method

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