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Lepkova, D.; Pavlova, L.; Ivanova, Jordanka

doi:10.1023/a:1018563432588

Cited by 8 publications

(9 citation statements)

References 1 publication

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“…Zinc silicate (Zn 2 SiO 4 ), with a wide band gap of 5.5 eV, is a promising multifunctional material. It has a wide range of applications such as phosphor host, paints, important crystalline phase in glass ceramics, electronic insulators, and rubber mixtures. , Especially, Zn 2 SiO 4 -based nanostructures have been widely studied in recent years due to their importance to the study of size- and dimensionality-dependent chemical and physical properties and great potential applications. , For example, mesoporous single-crystal ZnO sheathed with Zn 2 SiO 4 nanowires, highly aligned Mn-doped Zn 2 SiO 4 nanorods, and aligned Zn−Zn 2 SiO 4 core−shell nanocables have been obtained by a chemical vapor deposition technique. Additionally, Mn-doped Zn 2 SiO 4 rodlike nanoparticles have been synthesized through a hydrothermal method …”

Section: Introductionmentioning

confidence: 99%

Mesh-Like Hemispherical Shells Formed by Self-Assembly of Zn₂SiO₄ Textured Nanowires

Meng

Wei

et al. 2006

Crystal Growth & Design

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A new kind of self-assembled nanostructures, mesh-like hemispherical shells consisting of Zn 2 SiO 4 nanowires, was synthesized by a simple thermal evaporation and condensation process. X-ray diffraction and scanning electron microscopy characterizations on the products obtained at different stages during the thermal evaporation indicate that the mesh-like hemispherical shells were formed through generation of Zn vapor, solidification of liquid Zn droplets, surface oxidization, sublimation, splitting into hemispherical porous shells, further sublimation and oxidization, and reaction with SiO x vapor to form Zn 2 SiO 4 . The corresponding photoluminescence (PL) measurements reveal that the evolution of the mesh-like hemispherical shells accompanied the conversion of emissions at 385 and 508 nm from ZnO phase into emission at 522 nm from Zn 2 SiO 4 phase. The novel Zn 2 SiO 4 self-assembled nanostructures might have potential applications in future gas sensor and optoelectronic nanodevices.

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Section: Introductionmentioning

confidence: 99%

Mesh-Like Hemispherical Shells Formed by Self-Assembly of Zn₂SiO₄ Textured Nanowires

Meng

Wei

et al. 2006

Crystal Growth & Design

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“…11 ,12 It is believed that LiF is a scavenger of impurities and a lubricant promoting particle rearrangement, resulting from flux behavior of molten LiF whose melting point is 842c C. Also, it has been reported that co-additives of LiF B 2 O 3 are good sintering aids for spinel ceramics. 13 However, according to our examination, LiF and LiF B 2 O 3 were not so effective sintering aid as B 2 O 3 ; 1 mass!-LiF addition resulted in 56! density at 1275c C, which is compared with 95!…”

Section: Discussionmentioning

confidence: 73%

HIP 法による透明スピネル(MgAl<sub>2</sub>O<sub>4</sub>) 焼結体

Tsukuma

2006

J. Ceram. Soc. Japan

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Transparent MgAl 2 O 4 spinel ceramics were fabricated by hot isostatic pressing of the sintered materials composed of fine grains. Since the fine-grained sintered materials were difficult to obtain from pure powders at low temperatures, the additives reducing sintering temperatures were examined. As a result, a small addition of boron oxides 0.05-0.5 mass!-B 2 O 3 was found to be very effective. The influence of boron oxides on the microstructure was investigated. 8 Recently, Li reported that sinterable powders prepared by ammonium bicarbonate precipitation enable to be translucent without additives.9 Their works were conducted by applying high temperature 1700-1900c C vacuum sintering for the sinterable powders. In general, high temperature sintering results in large grain growth. In the case of spinel ceramics, the grain size became more than 10 mm. The large-grained microstructures might be deteriorating for mechanical strength.The translucent spinel with small grain size Ĭ1 mm has been studied by Hamano.10 They applied the technique called éreactive hot-pressingêto realize the fine-grained microstructures. High translucency was achieved using mixed powders of alumina and magnesia by low temperature 1400c C and high pressure 70 MPa hot pressing. They explained that the pressure-restriction of dilation due to the spinel-forming reaction may be necessary for translucency. The problem might be a difficulty for applying industrial production because of low production efficiency of high pressure hot-pressing. The aim of this study is to produce the transparent spinel composed of small grains. We thought to utilize a technique of hot isostatic pressing because it is advantageous for industrial productions. Dense sintered materials are needed for a capsule-free hot isostatic pressing. Since the dense spinel materials were difficult to fabricate by low temperature sintering of pure powders, we searched for sintering aids. As a result of the examination for several kinds of compounds such as LiF, Al 2 O 3 , CaO, SiO 2 and B 2 O 3 , we chose B 2 O 3 as a sintering aid. This paper will describe the microstructure and transparency of B 2 O 3 -incorporated spinel fabricated by hot isostatic pressing.

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“…Thus the ground state configuration is (t 2g ) 3 (e g ) 2 . This configuration gives rise to the electronic states, 6 A 1g , 4 A 1g , 4 E g , 4 T 1g , 4 T 2g , and to a number of doublet states of which 6 A 1g lies lowest according to Hund's rule. Since, all the excited states of Mn 2ϩ ion ͑belonging to d 5 configuration͒ will be either quartets or doublets, the luminescence spectra of Mn 2ϩ ions will have only spin forbidden transitions.…”

Section: Photoluminescence Studiesmentioning

confidence: 99%

“…Willemite (␣-Zn 2 SiO 4 ), with phenacite structure occurs naturally and belongs to the group of orthosilicates. 1 Willemite possesses a wide range of applications such as phosphor host, 2,3 electrical insulators, 4 glazes and pigments, 5,6 and is also an important component in glass ceramics. 7 Mn-activated willemite (Zn 2 SiO 4 :Mn) is an efficient green phosphor, and it has attracted many researchers for its potential applications to various types of display panels such as plasma display panel ͑PDP͒, vacuum fluorescent display ͑VFD͒, and field emission display ͑FED͒.…”

Section: Introductionmentioning

confidence: 99%

Solution combustion derived nanocrystalline Zn2SiO4:Mn phosphors: A spectroscopic view

Chakradhar

Nagabhushana

Chandrappa

et al. 2004

The Journal of Chemical Physics

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Cited by 8 publications

References 1 publication

Mesh-Like Hemispherical Shells Formed by Self-Assembly of Zn₂SiO₄ Textured Nanowires

Mesh-Like Hemispherical Shells Formed by Self-Assembly of Zn₂SiO₄ Textured Nanowires

HIP 法による透明スピネル(MgAl<sub>2</sub>O<sub>4</sub>) 焼結体

Solution combustion derived nanocrystalline Zn2SiO4:Mn phosphors: A spectroscopic view

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Untitled

Cited by 8 publications

References 1 publication

Mesh-Like Hemispherical Shells Formed by Self-Assembly of Zn2SiO4 Textured Nanowires

Mesh-Like Hemispherical Shells Formed by Self-Assembly of Zn2SiO4 Textured Nanowires

HIP 法による透明スピネル(MgAl<sub>2</sub>O<sub>4</sub>) 焼結体

Solution combustion derived nanocrystalline Zn2SiO4:Mn phosphors: A spectroscopic view

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Mesh-Like Hemispherical Shells Formed by Self-Assembly of Zn₂SiO₄ Textured Nanowires

Mesh-Like Hemispherical Shells Formed by Self-Assembly of Zn₂SiO₄ Textured Nanowires