To mass-produce glass, researchers borrow process from plastics manufacturing

Physics Today ◽  
2021 ◽  
Vol 2021 (1) ◽  
pp. 0428a
Keyword(s):  
Produce Glass

Progress on Ongoing Waste form HIP projects at ANSTO

MRS Advances ◽  
2018 ◽  
Vol 3 (20) ◽  
pp. 1059-1064 ◽  
Author(s):  
Eric R. Vance ◽  
Dorji T. Chavara ◽  
Daniel J. Gregg
Keyword(s):  
Spent Nuclear Fuel ◽  
Technology Development ◽  
Hot Isostatic Pressing ◽  
Waste Form ◽  
Process Technology ◽  
Ceramic Waste ◽  
Waste Forms ◽  
Produce Glass ◽  
Form Development ◽  
Year 2000

Abstract:Since the year 2000, Synroc has evolved from the titanate full-ceramic waste forms developed in the late 1970s to a hot isostatic pressing (HIP) technology platform that can be applied to produce glass, glass–ceramic, and ceramic waste forms and where there are distinct advantages over vitrification in terms of, for example, waste loading and suppressing volatile losses. This paper describes recent progress on waste form development for intermediate-level wastes from 99Mo production at ANSTO, spent nuclear fuel, fluoride pyroprocessing wastes and 129I. The microstructures and aqueous dissolution results are presented where applicable. This paper provides perspective on Synroc waste forms and recent process technology development in the nuclear waste management industry.

Glass Micro Balls Based on Glass Domestic Waste for Road Construction

2021 ◽  
Vol 1017 ◽  
pp. 111-121
Author(s):  
V.S. Bessmertniy ◽  
V.A. Klimenko ◽  
M.A. Bondarenko ◽  
A.V. Olisov ◽  
L.L. Bragina
Keyword(s):  
Road Construction ◽  
Spherical Shape ◽  
High Plasma ◽  
Alkali Resistance ◽  
Domestic Waste ◽  
Temperature Plasma ◽  
Plasma Burner ◽  
Amorphous Glass ◽  
Produce Glass ◽  
Road Marking

The glass micro balls based on glass domestic waste for road construction were obtained. Glass micro balls will reduce the contamination of road marking and increase its light-reflective ability at night. Colorless and colored container glass, as well as lead crystal, was chosen as the starting material for producing glass micro balls. An electric arc plasmotron UPU-8M was used to produce glass micro balls. Pre-crushed fractionated glass together with plasma-forming gas – argon was fed to the powder feeder and from the feeder to the plasma burner. Under the influence of high plasma temperatures, about 9000-12000K, the particles were melted, followed by cooling in the outgoing flow of plasma-forming gases. Due to high-temperature plasma exposure, partial evaporation of alkaline oxides and lead oxide occurred. Glass micro balls were enriched with the oxides of silicon, aluminum and calcium. This helped to increase the acid and alkali resistance of glass micro balls. The micro hardness, density, and refractive index of glass micro balls were studied. It is shown that glass micro balls have an ideal spherical shape and are x-ray amorphous. Glass micro balls are recommended for use in road construction as a reflective element of road marking.

Ultrasonic Coring of Glass Disks Using Double Core Tool

2011 ◽  
Vol 325 ◽  
pp. 436-441 ◽  
Author(s):  
Shigeomi Koshimizu
Keyword(s):  
High Precision ◽  
Ultrasonic Vibration ◽  
High Efficiency ◽  
Thrust Force ◽  
Recording Media ◽  
High Quality ◽  
Magnetic Disk ◽  
Glass Substrates ◽  
Ultraviolet Curable ◽  
Produce Glass

Glass disks are used as substrates for the recording media in magnetic disk devices. To mass produce glass disks, a technology is required for machining glass (a material that is difficult to machine) with both high precision and high efficiency. Consequently, this study adopted a method that processes the inner- and outer-diameters simultaneously using a double core tool. In addition, the thrust force in coring process was also reduced using an ultrasonic spindle to apply ultrasonic vibration to the feed direction of the rotating tool. This resulted in high quality machining with less chipping. Furthermore, this study conducted experiments to compare the three methods of stabilizing the stack of glass substrates. As a result, it was found that the method using ultraviolet curable resin was able to limit the chipping to a smaller size.

scholarly journals Preparation and properties of CaO-Al2O3-SiO2 glass-ceramics by sintered frits particle from mining wastes

2014 ◽  
Vol 46 (3) ◽  
pp. 353-363 ◽  
Author(s):  
F. He ◽  
Y. Zheng ◽  
J. Xie
Keyword(s):  
Chemical Resistance ◽  
Glass Ceramics ◽  
Xrd Analysis ◽  
Mining Wastes ◽  
X Ray Diffraction ◽  
X Ray ◽  
Main Crystalline Phase ◽  
Fine Microstructure ◽  
Produce Glass ◽  
Gold Tailings

The paper reports on some experimental results obtained from the production of glass-ceramics containing gold tailings powder (GTP). Frits particle sintered technology was used to prepare glass ceramic products. SiO2, CaO, ZnO, BaO and B2O3 were selected to adjust the composition of the glass. Based on the results of differential thermal analysis (DTA), the nucleation and crystallization temperature of parent glass samples with different schedule were identified, respectively. X-ray diffraction (XRD) analysis of the produced glass-ceramics materials revealed that the main crystalline phase was ?-wollastonite. With the increasing of CaO content, the intensity of crystal diffractive peaks also increases. The formation of ?-wollastonite crystal could be accelerated by the increasing of CaO. The glass-ceramics with fine microstructure showed better physical, mechanical properties and chemical resistance. Overall results indicated that it was a feasible attempt to produce glass-ceramics for building and decorative materials from waste materials. The amount of GTP used in the glass batches was more than 65 wt% of the whole raw.

Use of different inorganic solid wastes to produce glass foams

2015 ◽  
pp. 25-30
Author(s):  
A Barbosa ◽  
A Lopes ◽  
R Monteiro ◽  
F Castro
Keyword(s):  
Solid Wastes ◽  
Produce Glass

scholarly journals Scintillating Glass Fiber-Optic Neutron Sensors

1994 ◽  
Vol 348 ◽  
Author(s):  
K.H. Abel ◽  
R.J. Arthur ◽  
M. Bliss ◽  
D.W. Brite ◽  
R.L. Brodzinski ◽  
...  
Keyword(s):  
Pacific Northwest ◽  
Lithium Silicate ◽  
Aqueous Corrosion ◽  
Transmission Length ◽  
Double Crucible ◽  
Produce Glass ◽  
Glass Interface ◽  
Neutron Sensors ◽  
High Alkali ◽  
Scintillating Fibers

ABSTRACTPacific Northwest Laboratory (PNL) has fabricated cerium-activated lithium silicate scintillating fibers via a hot-downdraw process. These fibers, which, as produced, typically have a transmission length (e−1 length) of greater than 2 meters, are found to undergo aging when subjected to room air. The aging, which is complete in a few weeks, reduces the transmission length to the order of 0.5 meter. Because of the high alkali content of the glass (on the order of 20-30 mole % lithia), we have attributed this aging to aqueous corrosion at the polymer cladding/glass interface. Changes in transmission with chemical treatment of the surface support the corrosion model. Fiber transmission performance has been preserved by modifying the hot-downdraw to a double crucible to produce glass-on-glass waveguides.

scholarly journals Capabilities and Limitations of Fire-Shaping to Produce Glass Nozzles

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5477
Author(s):  
Alejandro Rubio ◽  
Sergio Rodríguez ◽  
Maria G. Cabezas
Keyword(s):  
Polished Glass ◽  
Nozzle Length ◽  
Gas Dynamic ◽  
Produce Glass ◽  
Nozzle Shape ◽  
Inner Diameter ◽  
Different Shapes ◽  
Capillary Size ◽  
Neck Diameter ◽  
Diameter Reduction

Microfluidic devices for drop and emulsion production are often built using fire-shaped (or fire-polished) glass nozzles. These are usually fabricated manually with inexpensive equipment. The shape limitations and poor reproducibility are pointed as the main drawbacks. Here, we evaluate the capabilities of a new fire-shaping approach which fabricates the nozzle by heating a vertical rotating capillary at the Bottom of a Lateral Flame (BLF). We analyze the effect of the heating conditions, and the capillary size and tolerances. The shape reproducibility is excellent for nozzles of the same size produced with the same conditions. However, the size reproducibility is limited and does not seem to be significantly affected by the heating conditions. Specifically, the minimum neck diameter standard deviation is 3%. Different shapes can be obtained by changing the heating position or the capillary dimensions, though, for a given diameter reduction, there is a minimum nozzle length due to the overturning of the surface. The use of thinner (wall or inner diameter) capillaries allows producing much shorter nozzles but hinders the size reproducibility. Finally, we showed an example of how the performance of a microfluidic device is affected by the nozzle shape: a Gas Dynamic Virtual Nozzle (GDVN) built with a higher convergent rate nozzle works over a wider parametric range without whipping.

Recycling of Pre-Fabricated Carbon-Fiber Waste as Filler for Sandwich Glass-Fiber Auto Parts

2014 ◽  
Vol 1043 ◽  
pp. 85-90
Author(s):  
Pongpicha Yamkamon ◽  
Kiattisak Sritrakulchai ◽  
Supphachan Rajsiri
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Unsaturated Polyester ◽  
Percent Elongation ◽  
Elongation At Break ◽  
Structure And Property ◽  
Glass Fiber Reinforced ◽  
Produce Glass ◽  
Auto Parts ◽  
High Polarity

This study explored the possibility of recycling pre-fabricated carbon to use as filler in conjunction with talc to produce glass-fiber reinforced unsaturated polyester composites. Specimens with six different resin compositions were prepared using hand lay-up technique. The structure and property relationship was characterized through tensile test and microstructure analysis. Mechanical properties incorporated with the failure analysis suggest that the recycling of carbon is feasible. The application of the recycled carbon showed the improvement on the less variation on the mechanical properties. The percent elongation at break tended to reduce, and traded-off with the deterioration on tensile strength at break and elastic modulus. Mixing with 10-15 wt% recycled carbon and 5-10 wt% talc powder was suggested to yield the optimal tensile properties. Moreover, the recycled carbon previously coated with unsaturated polyester guides the uniform distribution when required to process with a high-polarity material by reducing the polarity effect.

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