Mineralogical and chemical characteristics of a powder and purified quartz from Yunnan Province

Du, Guotong; Yang, Wen; Liao, Libing; Li, Zhaohui

doi:10.1515/geo-2016-0055

Cited by 27 publications

(6 citation statements)

References 15 publications

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“…1) contain all the characteristic peaks of clinoptilolite, 23 as well as intense lines of quartz. 24 Alkaline treatment (sample H(#1-B)) led to a noticeable decrease in the intensity of clinoptilolite lines, which indicates significant destruction of its crystal structure (γ~30%). But in this case, it should also be considered that alkaline treatment usually leads to a decrease in the particle size of the catalysts, which could worsen the X-ray diffraction pattern.…”

Section: Characterization Of the Samplesmentioning

confidence: 98%

Effect of Modifying the Clinoptilolite-Containing Rocks of Transcarpathia on Their Porous Characteristics and Catalytic Properties in the Conversion of C6-Hydrocarbons

Voloshyna¹,

Pertko²,

Povazhnyi³

et al. 2023

ChChT

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Section: Characterization Of the Samplesmentioning

confidence: 98%

Effect of Modifying the Clinoptilolite-Containing Rocks of Transcarpathia on Their Porous Characteristics and Catalytic Properties in the Conversion of C6-Hydrocarbons

Voloshyna¹,

Pertko²,

Povazhnyi³

et al. 2023

ChChT

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“…The existence of C in EDS data was linked to adventitious carbon contamination on the mineral surface. [28][29][30][31][32] The surface of pristine FLS was mainly composed of Si oxide with varying amounts of Na, and Al oxides according to Table 1. This data was found to be correlated with the chemical composition of FLS displayed in Table S1.…”

Section: Surface Characteristics Of Mineralsmentioning

confidence: 99%

Contribution of surface silanization process on mechanical characteristics of TPU‐based composites involving feldspar and quartz minerals

Bouzmane

Tirkes

Yılmaz

et al. 2022

Vinyl Additive Technology

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In this study, quartz and feldspar powders were surface treated using a silane coupling agent to achieve a more compatible mineral surface with the polymer matrix. Details of surface characteristics of minerals were examined by energydissipative X-ray spectroscopy, contact angle measurements, and infrared spectroscopy. Thermoplastic polyurethane-TPU was compounded with minerals using the melt-blending technique. Mechanical, thermo-mechanical, meltflow, and morphological characterizations of TPU and relevant composites were performed by utilizing tensile and Shore hardness tests, dynamic mechanical analysis (DMA), melt flow index (MFI) measurements, and scanning electron microscopy (SEM), respectively. Water repellency of TPU and composites were also evaluated experimentally. Effects of surface treatments were discussed by comparing the results of composites filled with pristine and modified minerals. Results revealed that enrichment of quartz and feldspar surfaces confer mechanical and thermo-mechanical performance of composites. Mineral inclusions caused no drastic changes to the MFI parameter of TPU. The silane layer on the mineral surface displayed a barrier effect to water uptake of composites. Homogeneous dispersion and improved interfacial adhesion of mineral particles to the TPU phase were confirmed with help of SEM observations. Quartz exhibited slightly higher performance thanks to its silicarich composition. The findings of this research exhibited the considerable influence of the silane layer on the mineral surface on the mechanical performance of TPU-based composites.

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“…They also possess relatively low hydraulic effect on cement [5] . The high purity quartzes are relevant in high technological industries such as semiconductors, high temperature lamp tubing, tele-communications, optics, microelectronics and solar silicon applications [6,7] . It is the second most abundant mineral on the earth surface after Feldspar and possesses a hardness of 7, white in color with a specific gravity between 2.6 and 2.7 [8] .…”

Section: Introductionmentioning

confidence: 99%

Effect Of Quartz Particle Size and Cement Replacement on Portland Limestone Cement properties

Olu

2022

Jour. of build. mater. Sci.

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This research focuses on investigating the effect of quartz particle sizeand cement replacement on their physicomechnical properties. Portlandlimestone cement (PLC) was employed and replaced with quartz powder(QP) at various particle sizes (1.19 mm, 425 µm, 300 µm, 212 µm, <212µm) and cement replacement between 2.5 wt.% ~ 15 wt.% at interval of2.5 wt.% to study their impact on the cement properties. The PLC chemical composition revealed a relatively low lime and high silica contentcompared to the conventional cement. QP revealed a high silica, lime andsulphur contents compared to natural sand. A high consistence, elongatedsetting times and lower strengths and specific gravities were observed ascement was replaced with QP at a given particle size respectively. Theeffect of replacing cement with QP content between 2.5 wt.% and 15 wt.%at various particle sizes resulted in average increments by 45.32%, 23.13%and 36.06% for initial setting time, final setting time and water demandrespectively. This increase could be related with clinker diminution coupled with enhanced QP surface area and clinker diminution. Similarly, anincrease in the QP surface area at a given cement replacement led to higherwater consistence, retarded setting times and lower strength. The effect ofenhancing the QP’ surface area between 1.19 mm and below 212 µm at agiven cement replacement resulted in average increments by 26.27%, 8.61%and 7.49% for initial and final setting times and water demand respectively.The strength gain of the QP cement blend diminished significantly above30% up to 15 wt.% cement replacement especially beyond 3 days. The lowstrength could be due to the high-water consistence linked with silica content resulting in setting time retardation. The optimal QP content was determined at 5 wt.% owing to the fact that the physicomechnical properties didnot significantly deviate from the properties of control.

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Mineralogical and chemical characteristics of a powder and purified quartz from Yunnan Province

Cited by 27 publications

References 15 publications

Effect of Modifying the Clinoptilolite-Containing Rocks of Transcarpathia on Their Porous Characteristics and Catalytic Properties in the Conversion of C6-Hydrocarbons

Effect of Modifying the Clinoptilolite-Containing Rocks of Transcarpathia on Their Porous Characteristics and Catalytic Properties in the Conversion of C6-Hydrocarbons

Contribution of surface silanization process on mechanical characteristics of TPU‐based composites involving feldspar and quartz minerals

Effect Of Quartz Particle Size and Cement Replacement on Portland Limestone Cement properties

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