quartz glass IEEE PAPER
Substance-to-substance joining of quartz glass
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Abstract. A pioneering procedure for substance-to-substance joining of quartz glass is described. Diffusion welding was examined as a possible joining method. Welded components made of quartz glass are applied in high-temperature engineering for laser
Effect of thermal treatment on the optical properties of colloidal Cu nanoparticles prepared by ion-implantation in quartz glass
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The process of implantation of metallic particles in silica glasses for the modification and preparation of materials has been advanced substantially in the last few years [1]. Ion- implantation is an attractive method for inducing colloid formation of metals and
Compressibility of fused-quartz glass at atmospheric pressure
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ABSTRACT The compressibility of fused-quartz glass was determined with sufficient accuracy to establish the required corrections for change of length with change of pressure of the fused-quartz glass etalons used in a Fabry-Perot interferometer to evaluate the Because much experimental data has been obtainedon the different nature of the chemical bonds and the symmetry of the local surroundings of the activator in different glasses, it is of interest to investigate whether these differences occur in the spectra of the
Photoelectric effect induced by high-intensity laser light beam from quartz and borosilicateglass
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ABSTRACT Using a high-intensity light beam from a rub; r laser, the number of photoelectrons from quartz and the number of photoelectrons for borosilicate glass were measured as a function of the laser output power. The number of electrons is an
Inorganic wastes in the manufacture of glass and glass-ceramics: Quartz-feldspar waste of ore refining, metallurgical slag, limestone dust, and phosphorus
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This work presents the results of an investigation on producing diopside glass-ceramic materials based on various combinatioils of quartz-feldspar waste from ore refiniug and limestone dust. Other industrial wastes were added to contribute as nucleation agents; In the technological hardware for integrated-circuit fabrication a major role is played by reactors of diffusion-oxidation and epitaxial systems and quartz-glass fittings (siliconwafer loaders, cassettes, holders, etc.). The requirements for these products are determined by The problem of fabricating quart-glass cuvettes by welding with CO 2 laser radiation is solved. A thermophysical analysis of the process is performed and its mathematical model is constructed. The welding was performed by two methods lap and T welding. In both
Solution growth of polycrystalline silicon on quartz glass substrates
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Solution growth of polycrystalline silicon on quartz glass substrates
Flatness correction of polished quartz glass substrates
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Conclusions Ion beam figuring flattens surfaces by scanning the surface line by line. The duration on a spot depends on the thickness of the material that has to removed. For calculating the residence time of the ion beam for every spot of the substrate to gain a
Quartz crystallization in soda-lime-silica glass
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The tribochemical treatment of glass and grains surface area as a crystallization activating factor and its influence on the crystal phase formation is a subject of the study. Sheet glass as a material of extremely small crystallization ability has been used in
Broken bottles and quartz-sand: glass production in Yorkshire and the North in the Roman period.
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Although glass workina: took place in virtually every area of the Roman world, the evidence for glass production is gc: neraJly ndbcr difficult to identify and interpret. There is a marked contrast between the wide range of vessels and objccu. which survive complete in burials
Quartz-feldspar separation for the glass and ceramics industries
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Abstract Large reserves of feldspar ore exist in the Aegean region of Turkey. The main colored impurities in these ores are iron-and titanium-bearing minerals such as anatase, rutile, sphene and ilmenite. In this study, a potassium feldspar ore containing mainly Use of finely disperse Tuganskoe quartz sands (Tomsk Oblast) in production of foam-glass crystalline materials by low-temperature synthesis of glass granulate instead of cullet was investigated. The important possibility of manufacturing foam-glass crystalline materials
Diffusion of water into quartz and silica glass
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The Adherence of Growing Copper and Iron Oxide Scales to Quartz Glass, Corundum and Platinum
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ABSTRACT During oxidation of metals the growing oxide or sulfide scales sometimes adhere to adjacent solid substances when mutual contact is taking place. A simple method for detection of this phenomenon has been elaborated. The adherence phenomenon was
Radiation Centres in Quartz Glass
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Influence of Impurities on Optical Quality of Flame Fused Silica Glass Produced with Brazilian Natural Quartz
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ABSTRACT Silica glass has been a key material for the optical industry due to its unique physical properties. In recent years, the high transmittance in the ultraviolet region also increased its demand for the manufacture of special lamps and tubes for UV disinfection
Crack-free laser direct-writing on quartz and glass for microfluidic chip development
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ABSTRACT We present a flexible microfluidic channel fabrication platform that can be used to develop microfluidic chips. A DPSS (diode pumped solid state) frequency-quadrupled (2.= 266 nm, the UV system) Nd: YAG laser and a CO2 laser (X= 10.6 rim, the JR system) are Studies in the system kaolin–quartz–dolomite have made it possible to obtain alkali-free glasses, which are distinguished by low CLTE and higher heat resistance, and have a high softening temperature and chemical resistance to water and alkali solutions. Electron
Laser-annealing-induced features of the Raman spectra of quartz/Si and glass/Si structures
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Abstract:The effect of laser radiation on the characteristics of amorphous silicon films on glassy or quartz substrates are studied by Raman spectroscopy. It is established that an increase in the laser treatment power yields a phase transition from amorphous silicon to
PROCESS ANALYSIS OF EXPERT AND NON-EXPERT ENGINEER IN QUARTZ GLASS
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ABSTRACT Quartz glass is a special glass material known as" King of Glass". The silicon purity of the quartz glass is very high, therefore it is excellent in heat resistance, chemical resistance and optical transparency as compared to other glasses, such as borosilicate The theoretical strength of silicate glasses is assessed at 8000-12,000 MPa, while the strength of industrial glasses that have undergone all technological operations and transportation, determined by the tensile or bending method, equals 50-120 MPa, that is, 2 Figure 2 shows the overall view of the setup. The inspection space of the furnace 1 is laid in the form of a channel that reduces the heat losses and improves the image quality of the object 2 on the screen 3. A heat-protecting filter 4 is placed on the body of the projector 5,
FABRICATION OF MICRO-PATTERN OF QUARTZ GLASS IN INJECTION MOLDING PROCESS
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layer with a thickness of several molecular diameters. In [6], as a result of an investigation of the intensity of scattering of x rays from poly (silicic acid) gel, a coordination number of the silicon atoms (CNsi) close to six was found. In [3], on the basis of data of NM: R and IR One method of hot-forming quartz glass products is by using a quartz blast burner, when the blank is subject to high temperatures and a gaseous medium. The equipment, the operating principle of oxygen--hydrogen burners, and the sequence of operations in the fabrication
Formation of nanostructure fragments in pure quartz glass at irradiation in the reactor core
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Problem of radiation defect production in oxides at the presence of water is still actually because of development of atom and solar energy. The aim of this work was to study the contribution of nano-sized particles into the changes of optical and mechanical properties Fig 2. Change in the value for the maximum of the natural absorption curve along the radius of the blocks of vacuum-compressed quartz glass made of (1, 2) rock crystal glass,(3) vein granulated quartz,(4, 5) vein milk-white quartz,(6, 7) synthetic quartz crystals, and (8) New operations and new methods of performing the known operations of purification of quartz grit are proposed on the basis of an analysis of the quartz formation conditions in different deposits, the structure and physical-chemical properties of the quartz, and known
Implantation of a holographic structure and waveguide periodic structures formed by silver nanoparticles into $ JO $ J film and quartz glass
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A holographic grating (HG) with period/= 2 Pm has been formed in an AgCI-Ag film on a glass substrate using two symmetric laser beams (O= 532 nm). A nonlinear self-diffraction effect takes place at the HG formation. The light-generated structure has been implanted During firing there is partial inversion of the quartz glass into cristobalite. While quartz glass possessing a very low coefficient of expansion (o~= 5.5, xi0-7 inl/deg) is distinguished by extremely high thermal-shock resistance, and will withstand violent thermal shocks,
WATER TRIPLE POINT ANALYSIS COMPARING CELLS MADE FROM QUARTZ AGAINST THOSE FROM BOROSILICATE GLASS
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Abstract Three years ago, at Tempmeko we presented the results of over 100 Water Triple Point Cells comparing these cells to a reference cell and to V-SMOW. These cells were made between 2001 and 2005 when K7 report of 22 laboratories Water Cells were
CONTAMINATION OF QUARTZ GLASS SAMPLE SURFACES UNDER IRRADIATION BY OUTGASSED VOLATILE PRODUCTS
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ABSTRACT Results of experimental simulation of deposition of spacecraft outer atmosphere products on high-orbit spacecraft optical surfaces are given. Basic data have been obtained when studying changes of quartz glass transmittance due to action of outgassed products Since quartz glass has a very low thermal expansion coefficient and contains a small amount of alkali ions (of the order of 10-3 to 10-4%), those thermal and thermoehemical methods for treating its surface to impart high tensile strength are not effective. Quartz As evident from Table 1 the strength of the fired samples cast from the mixed mass as well as of the dry samples prepared from the stabilized masses falls with decrease of the mixing The members of the conference dealt with the theory and practice of the production of quartz glass in the Soviet Union and abroad. In the Soviet Union in recent years quartz glass has been used to produce optical glass, pipes, various large articles, glass fibers, and material Until recently, quantitative evaluation of the depth of the structural defects has been carried out visually after conducting successive polishing of the ground surface of the glasses and etching. In order to carry out nondestructive control of the depth of the fissured layers In the process of working quartz glass by hydrofluoric acid a certain amount remains in the capillaries and microcracks of the glass and is not completely removed by subsequent washing with water. As a result the structure of the quartz deteriorates and the quality of The main faults in quartz glass depend on the quality of the raw material-rock crystal, its natural and other impurities. Therefore an investigation of the irregularities of glass and their causes makes it possible to use rational methods of eliminating loss in quartz glass
Beloshenko KS-Thermostimulated im-plantation of nanoscaled $ J particles into a quartz glass using a 2 laser beam LA Ageev, VK Miloslavsky, ED Mak-
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The forming mass consists of the following grain s [zes: 1.0-0.5 mm, 15%; 0.5-0.315 mm: 35%; 0.315-0.09 mm, 10%; and 0.063 mrn, 40%. As a binder organosilicon lacs are used, for example KO-915, introduced into the charge composition above 100% in amounts of 9- The motion of gases in porous media is widely used in chemical technology and is often found in natural phenomena. Therefore gas transport in dispersed systems, in rigid porous structures, and in fluidized layers has been studied in many works [1-6]. However, the
THE USE OF MONODISPERSE SILICA NANOPARTICLES FOR THE PRODUCTION OF OPTICALQUARTZ GLASS
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The method of synthesis of optical quartz glass by a synthesis of monodisperse nanoparticles of silica, their centrifugation, supercritical drying and sintering of nanoporous material is described. The advantages of this method compared with the method of
Spectroscopy of the Interaction between Sulfuric Plasma and Quartz Glass
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The detailed investigation [1] of a stable electric discharge in sulfur vapors at low pressures has revealed at least two promising applications. First, it is the lasing with possible frequency tuning due to a complex absorption and emission spectrum composition in the
Crude Oil/Brine Contact Angles on Quartz Glass
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ABSTRACT The initial wettability of a reservoir is the result of complex interactions between the crude oil, the connate water, and the rock surfaces. Adsorption of heavy polar organic material, commonly identified with the asphaltenes in crude oil, is responsible for
Quantifying Silica Reactivity in Subsurface Environments: Reaction Affinity and Solute Matrix Controls on Quartz and SiO2 Glass Dissolution Kinetics
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To date, a central focus of our research efforts has been to gain an understanding of silica- water interactions in terrestrial weathering environments. A knowledge of SdO2behavior is central to quantifying microscopic as well as global weathering processes in natural and The laying of a wall of a tank furnaces with these articles is normally done with the" foxhole method." Because of the thinness of the blocks 10-12 joints per linear meter are formed in the circumference of the furnace, through which the greatest destruction of the walls Quartz ceramics are widely used in the glass industry. Gob-forming components, gatevalves, mixers, tiles for lining the platforms of tunnel cars, heating grids, and rollers for chilling glass, insulators for softening furnaces, pots for melting special sorts of glass, and other items
Quartz Crystal Microbalance NO2 Sensor Coated with Ge-Se Glass Film Velichka Georgieva, Maria Mitkova 2, Ping Chen 2, Dmitri Tenne 3, Kasandra Wolf 2
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Abstract A study on the NO2 gas sorption ability of amorphous Ge33Se67 coated quartz crystal microbalance (QCM) is presented. The thin films have been characterized before and after sorption/desorption processes of NO2 by energy-dispersive X-ray spectroscopy (EDS
Zinc Silicate Alpha-Quartz Borosilicate Glass Composite for High Frequency Ceramic Multilayer Parts
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The near infrared window glass or quartz A study in precision
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All near infrared instruments are equipped with a window to protect the detectors from the atmosphere. Many types of sample cells are also fitted with a window between the sample surface and the detector. These windows may be composed of special optical glass or
Quartz Crystal Reinforced Silica Glass Obtained by Spark Plasma Sintering
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Abstract Spark Plasma Sintering (SPS) presents a very low processing time when compared to conventional sintering methods. Such fast processing conditions allow it to control the grain size growth and preserve the powders distribution into the mold during sintering,
At a quartz-plate natural frequency^ MHz, the change of the frequency for each 100 A of the thickness of the beryllium film was l80 Hz. The critical temperature
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The critical temperature was measured by determining the change of the self-induction of a flat coil placed directly over the film in the glass" finger" of the ampoule. The coil was connected in an AC bridge circuit, the output of which was connected through an amplifier
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