Synthesis of nanocrystalline silicon in the system La–Si–H–Cl: thermoanalytical investigations

Henneberg, E.; Acker, Jörg; Roever, Ingo; Roewer, Gerhard; Bohmhammel, K.

doi:10.1016/s0040-6031(01)00755-9

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…However, absence of calcium silicate in the products of the present study does not support this hypothesis. Silicon powders with brown color due to nanometer-scale crystallite size were reported in other studies [21,22]. In the light of these reports, crystallite size was calculated by using Maud program [23].…”

Section: The Properties Of Produced Siliconmentioning

confidence: 95%

Electrochemical decomposition of SiO2 pellets to form silicon in molten salts

Ergul

Karakaya

Erdogan

2011

Journal of Alloys and Compounds

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Section: The Properties Of Produced Siliconmentioning

confidence: 95%

Electrochemical decomposition of SiO2 pellets to form silicon in molten salts

Ergul

Karakaya

Erdogan

2011

Journal of Alloys and Compounds

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“…Acker et al [30] and Henneberg et al [31] reported the reduction of SiCl 4 with hydrogen over metal chlorides, which act as host to give nc-Si. These materials were investigated for their surface dangling bonds, electronic structure, and surface reactivity [32].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Terminated Silicon Nanopowders: Gas Phase Synthesis, Oxidation Behaviour, and Si-H Reactivity

Sprung

Heimfarth

Erler

et al. 2014

Silicon

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Silicon nanopowders were prepared by hot-wire chemical vapour deposition (CVD) from monosilane. Wire materials including Hf, Nb, Ta, Mo, W, Rh, Re, Ir, Pd, and Pt were tested. The filament temperature was varied in the range of 400 -2000°C and pressures between 1.0 -1.5 bar.Products were characterised by bulk elemental analysis and a laser granulometer. The powders were investigated by TG-DSC-MS under inert, O 2 , and H 2 O containing atmosphere, respectively, in a temperature range of 20 -700°C. Hydrogen evolution occurred in three separate steps, depending on the applied gas atmosphere. The oxidation mechanism was explored by the characteristic O x Si-H bands (x = 0 -3) observed in ex situ DRIFT experiments. The oxidation of hydrogen terminated silicon surfaces was investigated employing oxygen (O 2 ), hydrogen peroxide (H 2 O 2 ), permanganate (MnO − 4 ), or peroxodisulfate S 2 O 2− 8 in a temperature range of 0 -120°C. The oxidation was stepwise and strongly enhanced after pretreatment by alkyl lithium salts or Grignard reagents.

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“…SiCl4 is used as silicon source material for the production of organosilicates, silicon esters, organosilicon halides, silicone polymers, etc. SiCl 4 nowadays, is also used for the manufacturing of solar-grade (1-2) polycrystalline Si (3)(4)(5), nanocrystalline Si (6), Si nanowires (7), Si nanoparticles (8)(9), high purity SiO 2 (10), high porosity SiO 2 (11)(12) SiC (13)(14)(15)(16)(17)(18) and Si 3 N 4 (19)(20). In the industry, SiCl 4 is produced as a by-product along with other metal chlorides or by the direct chlorination of SiC, ferrosilicon, or SiO 2 /C mixture with chlorine gas.…”

Section: Introductionmentioning

confidence: 99%

Direct Solid-State Electrochemical Synthesis of Silicon Tetrachloride from Silica at Ambient Temperatures and Pressures

Ariwahjoedi

Fuad

Ariefin³

2010

ECS Trans.

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Silicon tetrachloride (SiCl4) is one of the most important chemical compounds in the microelectronic industries. Commercial scale synthesis of SiCl4 is usually performed by roasting silica (SiO2) and cokes (C) under flowing chlorine (Cl2) gas at temperatures {greater than or equal to}900oC. At room temperatures and atmospheric pressures, the formation of SiCl4 from Cl2, SiO2 and C can be calculated to be favorable with ΔGreaction as low as -120.77 kJ/mol. This paper reports the use of I-V characterization technique in ambient conditions SiCl4 synthesis via direct solid state electrochemical synthesis reaction, starting with sodium chloride (NaCl), rice-husk derived-SiO2, and C (graphite/charcoal mixture).

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Synthesis of nanocrystalline silicon in the system La–Si–H–Cl: thermoanalytical investigations

Cited by 3 publications

References 10 publications

Electrochemical decomposition of SiO2 pellets to form silicon in molten salts

Electrochemical decomposition of SiO2 pellets to form silicon in molten salts

Hydrogen Terminated Silicon Nanopowders: Gas Phase Synthesis, Oxidation Behaviour, and Si-H Reactivity

Direct Solid-State Electrochemical Synthesis of Silicon Tetrachloride from Silica at Ambient Temperatures and Pressures

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