Results 41 to 50 of about 26,623 (334)

Transmission of Light through K-feldspar

, 2022
Abstract In this paper, the experimental details and results are presented concerning the light transmission through K3 samples and its dependence on the polarization of the light. Very little absorption was found with wavelengths of light between 500 and 820 nm, but below 500 nm the absorption increased significantly.
openaire   +1 more source

Effect of Temperature and Atmosphere on Agglomeration of Bed Particles in a Bubbling Fluidised Bed Burning Na‐Enriched Coal

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Agglomeration of bed materials during circulating fluidised bed (CFB) combustion or gasification of high‐alkali fuel is a practical challenge in industrial practice. This work investigates experimentally the effect of temperatures (700°C–900°C) and atmosphere (air equivalence ratios 1.61–0.53) on agglomeration in a lab‐scale bubbling fluidised
Zipeng Guo, Jianbo Li, Xiaofei Long, Quanhai Wang, Xiaofeng Lu   +4 more
wiley   +1 more source

Statistical analysis on the radiological assessment and geochemical studies of granite rocks in the north of Um Taghir area, Eastern Desert, Egypt

Open Chemistry, 2022
Granite rocks are currently one of the foremost raw materials that can be used for various economic purposes such as ornamentation and building materials, because they do not possess radioactive concentrations and have good physical and mechanical ...
Awad Hamdy A., Abu El-Leil Ibrahim, Nastavkin Aleksey V., Tolba Abdellah, Kamel Mostafa, El-Wardany Refaey M., Rabie Abdalla, Ene Antoaneta, Tekin Huseyin O., Issa Shams A. M., Zakaly Hesham M. H.   +10 more
doaj   +1 more source

Atmospheric K-feldspar as a potential climate modulating agent through geologic time [PDF]

, 2017
Clouds and aerosols have a large, yet highly uncertain, effect on changes in Earth’s climate. A factor of particular note is the role played by ice-nucleating particles, which remains poorly understood.
Bryan, Fuhrer, Harrison, Hoose, Komurcu, Matthew J. Pankhurst, Morris, Murray, Pankhurst, Peckhaus, Pointing, Storelvmo, Vali, Zolles   +13 more
core   +1 more source

Mechanical property variation mechanisms of granite subjected to real‐time high temperatures and subsequent cooling treatment

Deep Underground Science and Engineering, EarlyView.
This study investigates the coupled thermo‐mechanical behavior of granite during heating and cooling through a combination of laboratory tests and finite element analysis. The thermal conductivity, mineral composition, mass loss rate, micro‐crack observation, and thermal fracture characteristics of granite under various temperature conditions are ...
Rui Pang, Dehao Meng, Thomas Frühwirt, Hao Liu, Yanan Zhao, Qingyou Zhu, Wengang Dang, Mohamed Ismael, Fei Wang   +8 more
wiley   +1 more source

Microscopic mechanism of sandstone hydration in Yungang Grottoes, China

Open Geosciences, 2020
The macroscopic engineering properties of sandstone are dominated primarily by mineral features in a microscopic scale. This study will investigate the microscopic physical and mechanical properties of the main minerals (quartz, K-feldspar, Na-feldspar ...
Chen Jiawei, Xu Jinming, Huang Jizhong
doaj   +1 more source

An Analysis of Relationship between the Microfracture Features and Mineral Morphology of Granite

Advances in Civil Engineering, 2021
Using the techniques of X-ray diffraction, polarizing microscopy, uniaxial compression, and scanning electron microscopy (SEM), the relationships between the microfracture features and mineral morphology of granite were studied.
Meiben Gao, Tianbin Li, Junxun Zhu, Hongyu Yin, Yongyi Yang   +4 more
doaj   +1 more source

Mineralogical characterisation and processing of some industrial minerals from Uganda [PDF]

, 1992
This report describes the mineralogical characterisation and processing of several industrial minerals collected by Dr DJ Morgan in October 1991 during a visit to Uganda (Visit report WG/91/31R).
Mitchell, C.J.
core  

Cap rock efficiency of geothermal systems in fold-and-thrust belts: Evidence from paleo-thermal and structural analyses in Rosario de La Frontera geothermal area (NW Argentina) [PDF]

, 2016
Cap rock characterization of geothermal systems is often neglected despite fracturing may reduce its efficiency and favours fluid migration. We investigated the siliciclastic cap rock of Rosario de La Frontera geothermal system (NW Argentina) in order to
Aldega, L., Bigi, S., Chiodi, Agostina Laura, Corrado, Sveva, Di Paolo, L., Giordano, G., Invernizzi, C., Maffucci, R.   +7 more
core   +2 more sources

Effect of confining pressure on fracture characteristics and mineralogical behavior of tight sandstone specimens after hydraulic fracturing

Deep Underground Science and Engineering, EarlyView.
Hydraulic fracturing in tight sandstone and fracture propagation characteristics using backscattered electron‐scanning electron microscope (BSE‐SEM) images. Abstract This study focuses on hydraulic fracturing experiments conducted under triaxial conditions on tight sandstone specimens from Shivpuri district, Madhya Pradesh, India.
Pankaj Rawat, Narendra Kumar Samadhiya
wiley   +1 more source