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Showing 1 to 20 of 49 for “"Pyrex"”.
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Three mechanisms of breakdown of pyrex glass
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1929.
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Temperature Effects on Radiation-Induced Optical Absorption in Pyrex
Made available in DSpace on 2017-07-06T18:55:29Z (GMT). No. of bitstreams: 3 Nadler_Jonathon_H_MS.pdf: 33331966 bytes, checksum: 652a8d0e2260e401fa48fd18f9f5e960 (MD5) Nadler_Jonathon_H_MS_ABS.pdf: 1104261 bytes, checksum: 263341cacf057793f5c9dfba6c50c8bd (MD5) license.txt: 4813 bytes, checksum: …
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Transient Nuclear Radiation Effects on the Transmission of Pyrex at 633 nm
Made available in DSpace on 2017-07-06T18:59:26Z (GMT). No. of bitstreams: 3 Williams_Wade_H_MS.pdf: 55121727 bytes, checksum: 7d5f890de2145f4d859194234bff0f5a (MD5) Williams_Wade_H_MS_ABS.pdf: 919143 bytes, checksum: cf7c69e07b93380268da8adbd36e2981 (MD5) license.txt: 4813 bytes, checksum: …
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Physical adsorption of argon, krypton and nitrogen on iron and pyrex at very low pressures
Physisorption of argon, krypton, and nitrogen on Pyrex and iron was studied by a static technique in a constant volume system, in the temperature range 77.4 to 90.2°K and in the pressure range 10⁻⁹ to 10⁻⁴ torr. Analyses via Electron Spectroscopy for Chemical Analysis (ESCA), Scanning Electron …
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Effect of radiation on silicon and borosilicate glass
… on the dimensions of two borosilicate glasses, Pyrex® and Hova SD-2®. These two glasses are commonly used as substrates for silicon microelectromechanical (MEMS) devices, and radiation-induced compaction in a substra.te can have deleterious effects on device performance. Results are presented …
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Solder self-assembly for MEMS fabrication
… sets of high aspect ratio conducting posts on a Pyrex substrate, along with electrical connections to the posts. The posts and substrates are fabricated separately and then combined together through a self-assembly process. The posts are made of silicon and are 25 Im in diameter and 50 plm tall …
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Packaging for a drug delivery microelectromechanical system
… This package is made from thermally bonded Pyrex® 7740 frames that are anodically bonded to the drug delivery chip. It increases the capacity of the chip, is smaller than the previous package and possesses true hermeticity, because of the bonding processes involved. This work describes the …
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A silicon micromachined subminiature condenser microphone : analysis, design, fabrication and testing
… the silicon membrane and the other the Pyrex glass (#7740) which forms the backplate. Between the capacitance circuit. Lithographic techniques are used to manufacture the condenser microphone with specially shaped backplates which contain the airgap and side volume cavity. An Anodic …
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Design and Fabrication of Nanofluidic Systems with Integrated Sensing Electrodes for Rapid Biomolecule Characterization
… the evaporation of chrome/gold (Cr/Au) onto a Pyrex 7740 wafer followed by photolithography and wet etching of the microchannels. The wafer was patterned a second time to form Au microelectrodes with 15-45 micrometer separation gaps in the nanochannel region. Sensing electrodes (up to one …
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Superconducting critical field measurements in cerium doped lead between 4.1 degrees and 1.8 degrees Kelvin
… percent cerium in lead had been vacuum cast in pyrex tubes. The relative fractions of the cerium in these samples and their final purities were tested by the techniques of neutron activation analysis.
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The use of magnesium-alloy tubing in heat exchangers
… pipe heat exchangers were constructed using pyrex glass tubes as outer shells. The pyrex tubes were two inches inside diameter, 2.25 inches outside diameter, five feet long and had flared ends. Each end of the pyrex tubes was equipped with a flange containing a 0.876 inch packing gland and a …
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ΜΕΛΕΤΗ ΦΩΤΟΧΗΜΙΚΩΝ ΑΝΤΙΔΡΑΣΕΩΝ 1-(Ν-1,2,3-ΤΡΙΑΖΟΛΥΛΟ)-ΙΜΙΔΙΩΝ
… WHEN IRRIDATED THROUGH A PYREX FILTER UNDERWENT EITHER ANINTRAMOLECULAR OR AN INTERMOLECULAR HYDROGEN ATOM ABSTRACTION, FOLLOWED BY A B- CLEAVAGE OF THE WEAK N-N BOND, WHICH LED TO THE FORMATION OF THE 1(2)H-1,2,3-TRIAZOLES AND DIBENZAMIDE. IRRADIATION OF THE 1- …
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Resonant ion heating in a helicon plasma
… coils placed on either side of the cylindrical pyrex vacuum chamber to create a time dependent magnetic field transverse to the steady state axial field. A 1 kW, 25--125 kHz RF generator powers the coils. The parallel and perpendicular ion temperatures in argon plasmas are measured with a laser …
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Solution for a modular die-level anodic bonder
… bonding is a common way to package silicon with Pyrex. The anodic bonding process requires high temperature, voltage, and moderate pressure to occur. Often, there are also expectations of alignment of features for things such as power or material delivery. The following thesis proposes a design …
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The adsorption of nitrogen and argon by evaporated films of sodium chloride
… routinely. The adsorption of nitrogen by Pyrex has been investigated and the results obtained have shown good agreement with those in the literature. Rigorously cleaned evaporated films of sodium chloride have been prepared and the adsorption of nitrogen and argon by them has been …
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Heat and mass transfer models of the University of Tennessee at Chattanooga distillation column
… the University of Tennessee at Chattanooga is a Pyrex glass unit with 12 separation stages, overhead receiver and a reboiler as shown on figure 8. In this thesis, mathematical models that relate to heat and mass transfer during a binary distillation of methanol-water mixture are developed and …
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A factorial approach to the study of alkali-silica reaction in concrete
… reactive aggregates in laboratory tests (namely Pyrex glass and Beltane opal) were studied. In general the experimental work was carried out using standard test methods as specified by the British Standards Institution and the American Society for Testing and Materials. In particular the "mortar …
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The relation of bed depth, particle density, and particle size to the local coefficients of heat transfer of internally-heated fluidized beds of solids
… density, and particle size were studied using a pyrex pipe four inches in diameter as the fluidizing vessel. The fluidized solids investigated were aerocat cracking catalyst, having a geometric-mean particle diameter of 0.00262 inch and an absolute density of 136.6 pounds per cubic foot; tabular …
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Developing a spin polarized helium ion source for surface electronic structure studies
… to produce metastable helium atoms in a clean pyrex glass cell. A 300 mW Ti:sapphire laser operating at 1.083 $\mu$m is used to optically pump the He(2$\sp3$S) atoms on the $\rm 2\sp3S\sb1\leftrightarrow 2\sp3P\sb1\ (D\sb1)$ transition to preferentially populate the $\rm He(2\sp3S)\ …
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Packaging and interconnection of a black-lit CCD sensor device
… possible materials: silicon, aluminum nitride, Pyrex, and LZS (a zirconia/ silicon nitride composite). The process also allows for two possible electrical connection techniques.
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