Synthesis of γ-alumina nano powder from Nepheline syenite

2016 ◽  
Vol 34 (1) ◽  
pp. 66-72 ◽  
Author(s):  
Mehran Chitan ◽  
Seyed Ali Hosseini ◽  
Dariush Salari ◽  
Aligholi Niaei ◽  
Habib Mehrizadeh
Keyword(s):  
Nepheline Syenite ◽  
Nano Powder

About the composition of meliphanite from nepheline syenite pegmatite of the Sakharjok massif (Kola Peninsula)

2018 ◽  
Vol 147 (2) ◽  
pp. 79-91 ◽  
Author(s):  
Lyalina L. М. ◽  
◽  
Kadyrova G. I. ◽  
Selivanova E. A. ◽  
Zolotarev A. A. jr. ◽  
...  
Keyword(s):  
Kola Peninsula ◽  
Nepheline Syenite

Method for nano-powder dispersion degree definition

2018 ◽  
Vol 2018 (7) ◽  
pp. 45-48 ◽  
Author(s):  
Лариса Шестопалова ◽  
Larisa Shestopalova
Keyword(s):  
Distribution Curve ◽  
Powder Dispersion ◽  
Nano Powder ◽  
Dispersion Degree ◽  
Definition Of

Relying upon Stokes Law there was offered a way for the definition of nano-powder dispersion on measuring a speed of its sedimentation from powder slurry in water. Way is to construct differential nanopowder’s particles distribution curve of by fractions to determine their main size.

A review of the composition and evolution of hydrocarbon gases during solidification of the Ilímaussaq alkaline complex, South Greenland

2001 ◽  
pp. 159-166 ◽  
Author(s):  
Jens Konnerup-Madsen
Keyword(s):  
Nepheline Syenite ◽  
Subsequent Development ◽  
High Water ◽  
Vapour Phase ◽  
Low Carbon ◽  
Low Oxygen ◽  
Alkaline Complex ◽  
Hydrocarbon Gases ◽  
Wide Range ◽  
Water Contents

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Konnerup-Madsen, J. (2001). A review of the composition and evolution of hydrocarbon gases during solidification of the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin, 190, 159-166. https://doi.org/10.34194/ggub.v190.5187 _______________ Fluid inclusions in minerals from agpaitic nepheline syenites and hydrothermal veins in the Ilímaussaq complex and in similar agpaitic complexes on the Kola Peninsula, Russia, are dominated by hydrocarbon gases (predominantly methane) and hydrogen. Such volatile compositions differ considerably from those of most other igneous rocks and their formation and entrapment in minerals reflects low oxygen fugacities and a wide range of crystallisation temperatures extending to a low-temperature solidus. Their composition reflects initial low carbon contents and high water contents of the magma resulting in the exsolution of a waterrich CO2–H2O dominated vapour phase. Fractionation of chlorides into the vapour phase results in high salinities and the subsequent development of a heterogeneous vapour phase with a highly saline aqueous-rich fraction and a methane-dominated fraction, with preferential entrapment of the latter, possibly due to different wetting characteristics. The light stable isotope compositions support an abiogenic origin for the hydrocarbons in agpaitic nepheline syenite complexes.

Petrology of nepheline syenite gneiss from Amazonian Brazil

2007 ◽  
Vol 18 (1) ◽  
pp. 53-75 ◽  
Author(s):  
G. R. Lowell ◽  
R. Netuno Villas
Keyword(s):  
Nepheline Syenite ◽  
Amazonian Brazil

Reduction of pores and wear rate in electrical discharge coating by using hBN nano powder

2021 ◽  
Author(s):  
Rashi Tyagi ◽  
Suman Swaraj ◽  
Amitava Mandal ◽  
Alok Kumar Das
Keyword(s):  
Wear Rate ◽  
Electrical Discharge ◽  
Nano Powder

Producing ZnO nano powder from rotary hearth furnace dust along with Pb removal

2021 ◽  
pp. 108496
Author(s):  
Dianchun Ju ◽  
Haiwei Yao ◽  
Han Ma ◽  
Rui Mao ◽  
Jiayong Qiu ◽  
...  
Keyword(s):  
Rotary Hearth Furnace ◽  
Hearth Furnace ◽  
Nano Powder

scholarly journals Synthesis and Characterization of Lithium-Ion Conductive LATP-LaPO4 Composites Using La2O3 Nano-Powder

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3502
Author(s):  
Fangzhou Song ◽  
Masayoshi Uematsu ◽  
Takeshi Yabutsuka ◽  
Takeshi Yao ◽  
Shigeomi Takai
Keyword(s):  
Room Temperature ◽  
Conduction Mechanism ◽  
Lithium Ion ◽  
X Ray Diffraction ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
X Ray ◽  
Nano Powder ◽  
Powder Addition

LATP-based composite electrolytes were prepared by sintering the mixtures of LATP precursor and La2O3 nano-powder. Powder X-ray diffraction and scanning electron microscopy suggest that La2O3 can react with LATP during sintering to form fine LaPO4 particles that are dispersed in the LATP matrix. The room temperature conductivity initially increases with La2O3 nano-powder addition showing the maximum of 0.69 mS∙cm−1 at 6 wt.%, above which, conductivity decreases with the introduction of La2O3. The activation energy of conductivity is not largely varied with the La2O3 content, suggesting that the conduction mechanism is essentially preserved despite LaPO4 dispersion. In comparison with the previously reported LATP-LLTO system, although some unidentified impurity slightly reduces the conductivity maximum, the fine dispersion of LaPO4 particles can be achieved in the LATP–La2O3 system.

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