On the Spinel Precipitation in Al-Doped Ni1−xO

Wang, S.R.; Shen, Pouyan

doi:10.1006/jssc.1998.7820

Cited by 11 publications

(3 citation statements)

References 31 publications

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“…24,25 Such metallic nickel atoms were expected to enhance the formation of the conductive filament in the NiO x film, producing reproducible resistive switching behavior during voltage sweeping. 24,25 Such metallic nickel atoms were expected to enhance the formation of the conductive filament in the NiO x film, producing reproducible resistive switching behavior during voltage sweeping.…”

Section: Characterization Of Chemical Binding Statesmentioning

confidence: 99%

Effect of Al doping on resistive switching behavior of NiOx films for nonvolatile memory application

Kim

et al. 2010

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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Articles you may be interested inResistance switching behaviors of amorphous (ZrTiNi)Ox films for nonvolatile memory devices J. Vac. Sci. Technol. A 32, 061505 (2014); 10.1116/1.4896329 Unipolar resistive switching behavior of amorphous YCrO3 films for nonvolatile memory applications J. Appl. Phys. 116, 084505 (2014); 10.1063/1.4893661 Effect of plasma treatment of resistive layer on a Cu/SiOx/Pt memory device J. Vac. Sci. Technol. A 32, 02B111 (2014); 10.1116/1.4859235Well controlled multiple resistive switching states in the Al local doped HfO2 resistive random access memory device In this work, the authors investigated the effect of Al doping on the resistance switching characteristics of sputtered NiO x films. Pt/ NiO x / Pt metal-insulator-metal ͑MIM͒ stacks were fabricated by reactive dc magnetron sputtering with various Al contents in NiO x films and the resistance switching behavior of the MIM stack was characterized in conjunction with physical property, such as chemical bonding of NiO x . Al doping into NiO x films improved the endurance of SET/RESET operations, the distribution of V SET , and the memory window compared to the undoped NiO x films. X-ray photoemission spectroscopy showed that the Al doping caused the density of metallic nickel ͑Ni 0 ͒ to be increased with the reduction of Ni 3+ concentration. It was considered that the increase of metallic nickel ͑Ni 0 ͒ in Al-doped NiO x films enhanced the repeated formation and rupture of conductive filaments during resistive switching operation, resulting in the enhanced endurance and the narrowed V SET distribution.

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Section: Characterization Of Chemical Binding Statesmentioning

confidence: 99%

Effect of Al doping on resistive switching behavior of NiOx films for nonvolatile memory application

Kim

et al. 2010

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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“…Diversas investigaciones han mostrado que la formación de aluminato de níquel (capas con espesor entre 1 y 4Å ) en sistemas NiO/Al 2 O 3 preparados por impregnación de nitrato de níquel es un fenómeno que tiene lugar a temperaturas tan bajas como 350 °C [15][16][17]; esta situación significa que efectivamente el óxido de níquel reacciona con la alúmina a partir de 473 K para formar aluminato de níquel. Aunque aluminato de ní-quel es una espinela bien definida y difícil de reducir, la formación de seudoespinelas no necesariamente se limita a las mezclas estequiomé-tricas de óxido de níquel y de alúmina ya que los defectos tipo Al[Al 5/ 3 M 1/3 ]O 4 favorecen la formación de soluciones sólidas con especies M 2+ en las cuales los iones Ni 2+ se desplazan desde vacancias octaédricas hacia posiciones con alta energía de estabilización [18][19][20].…”

Section: Temperatura De Hidrólisis (unclassified

Influencia de algunas variables del proceso solâgel en las propiedades texturales y estructurales de un soporte de NiAl<sub>2</sub>O<sub>4</sub>

Almanza¹,

Valencia²

2004

Bol. Soc. Esp. Ceram. Vidr.

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En este trabajo se estudian algunos aspectos asociados con la síntesis, mediante procesamiento sol-gel, del aluminato de níquel. A los sólidos obtenidos se les determina la composición elemental mediante absorción atómica y fluorescencia de rayos-X, se les investiga la textura por sortometría de N 2 a 77 K, se les analiza la estructura por difracción de rayos-X y se les examina la morfología con microscopía electrónica de barrido. Los resultados muestran que la hidrólisis a 80 °C y pH 10 de tri-sec-butóxido de aluminio en presencia de nitrato de níquel conduce a un xerogel cuyo tratamiento a 900 °C resulta en un sólido azul brillante, finamente dividido, poroso y altamente compatible con la espinela NiAl 2 O 4 . La textura de estos materiales se manifiesta por isotermas adsorción-desorción de nitrógeno tipo IV y anillos de histéresis tipo E; se verifica que la temperatura de hidrólisis no ejerce una marcada influencia sobre el área superficial de los sólidos y se comprueba que los sólidos poseen una distribución monomodal de tamaños de poro.Palabras Clave: Procesamiento sol-gel, aluminato de níquel, espinelas cerámicas, soportes oxídicos. Influence of some variables of the sol-gel process in the textural and structural properties of a NiAl 2 O 4 supportIn this work some aspects related to the synthesis of nickel aluminate as a ceramic material by the sol-gel processing, are studied. The solids obtained are analyzed by atomic absorption and x ray flourescence in order to determine their chemical composition. Texture is investigated using N 2 adsorption-desorption isotherms, the structure is verified by x ray diffraction, and the morphology is looked using scanning electron microscope. The results show that the hydrolysis of aluminum tri-sec-butoxyde in presence of nickel nitrate at 80 °C and pH 10, produces a xerogel whose treatment at 900 °C results in a bright blue, fine, porous, spinel type solid, NiAl 2 O 4 . Texture data of these materials as shown by type IV isotherms with hysteresis loops type E; it verifies that hydrolysis temperature does not influence the surface area and confirms that these solids have a monomodal pore size distribution.Key Words: Sol-gel processing, nickel aluminate, spinels, oxide supports. INTRODUCCIÓNA escala industrial, la mayoría de los procesos de hidrogenación se llevan a cabo con la ayuda de catalizadores heterogéneos, utilizando como fase activa metales de reconocida actividad catalítica, soportados sobre materiales tales como: alúminas, sílica gel, magnesia, kieselguhr, titania, zeolita, zirconia y otros óxidos que tienen como función dispersar la fase activa, protegerla contra diversas formas de desactivación y mejorar el desempeño catalítico. Adicionalmente, en estos materiales, el soporte puede participar como un componente bifuncional, como fase sinergística o como material de relleno que protege contra la sinterización e incrementa la resistencia a los tratamientos térmicos, a la abrasión y a la atricción.Las técnicas de preparación de catalizadores más comunes son la p...

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“…For example, in the NiO/NiAl 2 O 4 composite prepared by reactive sintering NiO and Al 2 O 3 powders with a negligible extent of nonstoichiometry, the NiAl 2 O 4 spinel was found to precipitate as micron-sized plates having {1 0 0} habit plane and parallel epitaxial relationship with the rock-salt type host, i.e. Al 3+ -doped NiO [1]. The NiAl 2 O 4 spinel also occurred as equi-axed particles, which tended to detach from grain boundaries in order to reach parallel epitaxial relationship with respect to the host via a Brownian-type rotation/coalescence process of the confined particles at high temperature [2].…”

Section: Introductionmentioning

confidence: 98%

On the spinel formation in Co1−xO/Co2TiO4 composites via reactive sintering, exsolution and oxidation

Yang

Shen

2011

Ceramics International

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On the Spinel Precipitation in Al-Doped Ni1−xO

Cited by 11 publications

References 31 publications

Effect of Al doping on resistive switching behavior of NiOx films for nonvolatile memory application

Effect of Al doping on resistive switching behavior of NiOx films for nonvolatile memory application

Influencia de algunas variables del proceso solâgel en las propiedades texturales y estructurales de un soporte de NiAl<sub>2</sub>O<sub>4</sub>

On the spinel formation in Co1−xO/Co2TiO4 composites via reactive sintering, exsolution and oxidation

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On the Spinel Precipitation in Al-Doped Ni1−xO

Cited by 11 publications

References 31 publications

Effect of Al doping on resistive switching behavior of NiOx films for nonvolatile memory application

Effect of Al doping on resistive switching behavior of NiOx films for nonvolatile memory application

Influencia de algunas variables del proceso solâgel en las propiedades texturales y estructurales de un soporte de NiAl<sub>2</sub>O<sub>4</sub>

On the spinel formation in Co1−xO/Co2TiO4 composites via reactive sintering, exsolution and oxidation

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Influencia de algunas variables del proceso solâgel en las propiedades texturales y estructurales de un soporte de NiAl<sub>2</sub>O<sub>4</sub>