Growth of β-FeSi2 layers deposited from a molten salt

Ohishi, T.; Mizuyoshi, Yusuke; Matsuyama, Tsuyoshi; Tatsuoka, Hirokazu

doi:10.1016/j.tsf.2004.02.063

Cited by 12 publications

(8 citation statements)

References 13 publications

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“…Additionally, if the D has an activation energy of 1-2 eV [22], which is a typical value for the silicide formation, the Co diffusion at 900 1C is estimated to be several microns, which roughly agrees with the a-FeSi 2 thickness of 10 mm. The estimated D of Co atoms is lower than that of the Si diffusion of 10 À 11 cm 2 /s [2]. The difference in the diffusion b-Fe 1 À x Co x Si 2 multilayered structure as shown in Fig.…”

Section: Resultsmentioning

confidence: 76%

“…An attempt has been made to grow high quality large-sized b-FeSi 2 bulk single crystals. Though it is difficult to grow b-FeSi 2 bulk crystals from the liquid phase due to the existence of the high temperature aFeSi 2 phase [1], a vacuum free, molten salt method to grow large sized b-FeSi 2 layers has been established [2]. Since then, the silicide growth technique using the molten salt method has been improved in order to fabricate mm-sized b-FeSi 2 substrates [3].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Cu or Co addition on β-FeSi2 growth by molten salt method

Wen

Yamashita

et al. 2012

Journal of Crystal Growth

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Section: Resultsmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Effect of Cu or Co addition on β-FeSi2 growth by molten salt method

Wen

Yamashita

et al. 2012

Journal of Crystal Growth

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“…In addition, a vacuum-free growth technique for the β-FeSi 2 layers or bulk preparations has been developed on the basis of the reactive deposition techniques [13]. The use of MnCl 2 as a source material was also examined in order to grow MnSi 1.7 layers [14].…”

Section: Resultsmentioning

confidence: 99%

Growth of Ca-Germanide and Ca-Silicide Crystals by Mechanical Alloying

Warashina

Ito

Nakamura

et al. 2009

e-J. Surf. Sci. Nanotechnol.

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Ca-germanide and Ca-silicide crystals were synthesized by mechanical alloying (MA). The resulting powders made from the Ca and Si powders contain Ca2Si and/or Ca5Si3 phases with additional cubic phase crystals. The grown phases, namely Ca2Si and Ca5Si3, can be controlled by the Ca/Si ratio and the Si powder size. For the powders synthesized using the Ca and Ge powders, the cubic crystalline phase was synthesized. It was found that the powders synthesized from the Ca and Ge powders are covered by an amorphous layer that contains oxidized carbons. The Ca-based bulk tablets pressed from the powders show a p-type semiconducting behavior, though the powder surface is heavily oxidized, which might affect the transport property of the bulk.

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“…Contrary to many other refractory metal-silicon-oxygen systems, Mg can form stable phases with Si and O, such as Mg 2 SiO 4 and MgSiO 3 . It has been reported that Mg 2 SiO 4 grains can be produced by the coalescence of MgO and SiO 2 grains.…”

Section: Syntheses Of Nanostructure Bundlesmentioning

confidence: 99%

“…Recently, a variety of metal silicides, for example, β-FeSi 2 , Mg 2 Si, MnSi 1:7 , hexagonal MoSi 2 and CrSi 2 , have been successfully grown by various growth techniques. [3][4][5][6][7] However, few metal silicide has been applied for the practical use, which is attributed to the modest figure of merit (ZT) of the metal silicides.…”

mentioning

confidence: 99%

Syntheses of Nanostructure Bundles Based on Semiconducting Metal Silicides

Ishikawa

Tatsuoka

2013

Funct. Mater. Lett.

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A variety of nanostructure bundles and arrays based on semiconducting metal silicides have been synthesized using abundant and non-toxic starting materials. Three types of fabrication techniques of the nanostructure bundles or arrays, including direct growth, template synthesis using natural nanostructured materials and template synthesis using artificially fabricated nanostructured materials are demonstrated. CrSi 2 nanowire bundles were directly grown by the exposure of Si substrates to CrCl 2 vapor at atmospheric pressure. A hexagonal MoSi 2 nanosheet, Mg 2 Si/MgO composite nanowire and Mg 2 Si nanowire bundles and MnSi 1:7 nanowire array were synthesized using a MoS 2 layered material, a SiO x nanofiber bundle, a Si nanowire array, and a Si nanowire array as the templates, respectively. Additionally, the fabrication phenomenon and structural properties of the nanostructured semiconducting metal silicides were investigated. These reactions provided the low-cost and controllable synthetic techniques to synthesize large scale and one-dimensional semiconducting metal silicides for thermoelectric applications.Semiconducting metal silicides have been extensively investigated for silicon-based semiconducting technology and considered as promising materials for the renewable energy technology in the field of thermoelectric and photovoltaic applications. 1,2 Compared to the conventional semiconducting materials, the metal silicides have many advantages, such as low-cost, natural abundance, non-toxicity and easy recycling, therefore, they are considered as environmentally friendly semiconductor materials. Recently, a variety of metal silicides, for example, β-FeSi 2 , Mg 2 Si, MnSi 1:7 , hexagonal MoSi 2 and CrSi 2 , have been successfully grown by various growth techniques. 3-7 However, few metal silicide has been applied for the practical use, which is attributed to the modest figure of merit (ZT) of the metal silicides.One-dimensional nanostructures are attracting a great deal of attention due to their unique properties and novel applications compared to those of bulk materials. A decrease in the thermal conductivity and an increase in the power factor, S 2 , of the nanostructures have been demonstrated by the theoretical calculations and proof of principle experiments, relative to the corresponding bulk structures. [8][9][10][11] Hochbaum et al. reported that the Si nanowires with diameters of about 50 nm exhibit a 100-fold reduction in thermal conductivity, yielding ZT ¼ 0.6 at room temperature. 11 Various nanostructures have been synthesized and charactered, such as wires, rods, nails, ribbons, belts, sheets and rings. It is well-known that a single-walled carbon nanotube can be metallic or semiconductive, depending on the helical angle at which the graphitic sheet is rolled up, 12 which reveals the importance of controlling its morphological and structural properties. Unfortunately, the growth window for the specific morphology is narrow, namely the morphology can be significantly changed as wires, rods, ribbons...

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Growth of β-FeSi2 layers deposited from a molten salt

Cited by 12 publications

References 13 publications

Effect of Cu or Co addition on β-FeSi2 growth by molten salt method

Effect of Cu or Co addition on β-FeSi2 growth by molten salt method

Growth of Ca-Germanide and Ca-Silicide Crystals by Mechanical Alloying

Syntheses of Nanostructure Bundles Based on Semiconducting Metal Silicides

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