Results 261 to 270 of about 127,520 (303)

Synthesis of nano silica particle from silica sand and characterization of nano silica based R134a refrigerant

Materials Today: Proceedings, 2021
Abstract This paper presents the synthesis and characterization of a mixture of different percentages of nano-silica with R134a as a refrigerant material. This work shows ways for enhancing the thermal performance of the vapor compression process and the effect of the suspended silica nanoparticle in the R134a refrigerant.
Md. Wakil Ur Rahman, Mustafizur Rahman, M.R.I. Sarker, Fazlur Rashid, Md. Masum Al Mahmud   +4 more
openaire   +1 more source

Solar sintering of Jordanian silica sand

2013 1st International Conference & Exhibition on the Applications of Information Technology to Renewable Energy Processes and Systems, 2013
This paper presents the detail description of a solar powered CNC machine. The CNC machine is designed, built and operated completely using solar energy by adjusting the head of the machine using plastic Fresnel lens of 100 cm diameter to focus sunlight to get the melting temperature of various materials, such as: silica sand, glass, plastic, and steel.
openaire   +1 more source

Materials Science Improves Silica Sand Strength

SPE International Symposium and Exhibition on Formation Damage Control, 2014
Abstract Due to its low cost, availability, roundness and strength, silica sand has been the preferred proppant for hydraulic fracturing. However in deeper completions stronger proppant must be used. If the strength of the material does not match the formation closure stress conditions, it will crush and fines will be generated, often ...
openaire   +1 more source

Bacterial Retention in Lipopolysaccharide Coated Silica Sand

Separation Science and Technology, 2007
Abstract Wastewater reclamation has been widely practiced in agriculture. When reclaimed wastewater is used for irrigation, among other requirements, it is important that the pathogenic bacteria are removed. Consequently, technologies such as immobilization or sorption barriers have been developed.
Junliang Liu, Weipu Xu, Qingjian Zhao, Mingqi Qiao, Huiyun Zhang, Gang Chen   +5 more
openaire   +1 more source

Refining Istanbul's silica sand

2019
WOS ...
Ay, Nuran, Arıca, E
openaire   +1 more source

Transport of malonate in a goethite–silica sand system

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 1999
Abstract The mobility of weak organic acids is of great importance for the transport of heavy metals and other contaminants. This work discusses the breakthrough behavior of malonic acid through a column packed with goethite coated sand. The transport of malonic acid is dominated by multicomponent chemical interactions of protons and the malonic acid
Filius, J.D., Meeussen, J.C.L., van Riemsdijk, W.H.   +2 more
openaire   +2 more sources

Iron Silica Sand Interface Reactions.

1960
PhD ; Metallurgy ; University of Michigan, Horace H. Rackham School of Graduate Studies ; http://deepblue.lib.umich.edu/bitstream/2027.42/182616/2/6001750 ...
openaire   +2 more sources

Laser Sintering of Silica Sand ? Mechanism and Application to Sand Casting Mould

The International Journal of Advanced Manufacturing Technology, 2003
Silica sand is commonly used in the foundry industry. With a high melting point of 160°C, the silica sand is normally sintered in a high-temperature furnace. However, silica with contents of calcium, aluminium, magnesium, and chlorine, etc. can form low-melting point eutectics.
Wang, X.H., Fuh, J.Y.H., Wong, Y.S., Tang, Y.X.   +3 more
openaire   +1 more source

Silica sand production in Croatia

2007
Silica sand is an important non-metallic mineral raw material within the resources of the Republic of Croatia. Croatian silica sand reserves could meet industrial needs over the long term. The 15 exploitation fields are registered, and the average annual production in the last 10 years is about 240, 000 tonnes. Depending on quality i.e.
Salopek, Branko, Bedeković, Gordan, Sobota, Ivan   +2 more
openaire   +1 more source

Ripening of silica sand used for filtration

Water Research, 1992
Abstract Sand used in rapid filter experiences changes with respect to quality and granulometric parameters, during its operating life time. Developed in the surface of its grains is a film, the colour of which, brown or black, indicates the presence of various materials: this is associated with the “ripening” of sand.
openaire   +1 more source