Results 241 to 250 of about 165,819 (299)
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT Bamboo charcoal–based extruded activated carbons were prepared via molding, pre‐oxidation, carbonization, and steam activation, with coal tar, phenolic resin, and their mixtures employed as binders based on practical availability and technical feasibility. This study focused on the regulatory effects of binders on the mechanical properties and
Huitao Jiang, Songlin Zuo
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The Anatomical Record, EarlyView.Abstract Studies investigating paleopathologies in sauropods remain scarce despite their relative abundance in the fossil record. In this study we report new occurrence of paleopathological features, corresponding to a neoplasm found in a middle caudal vertebra (MCT.R.2120) of an advanced titanosaur from the Presidente Prudente Formation (Bauru Basin ...
Maria Luiza Peres Bertolossi +5 more
wiley +1 more source
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Porous fused silica ceramics prepared by gelcasting using multigrade fused silica powders
Journal of Alloys and Compounds, 2020Abstract Porous fused silica ceramics were successfully prepared by gelcasting using N, N–dimethylacrylamide (DMAA) as gelling agent and multigrade powders as starting materials. The results suggest that the ratio of fine–grained to coarse–grained mixed powders, solid loading and sintering temperature were highly correlated with microstructure and ...
Shuang Yin +10 more
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Journal of the European Ceramic Society, 2001
Abstract The threshold stress intensity factor for sub-critical crack growth in fused silica was measured using the interrupted static fatigue (ISF) test and from observations of indentation crack growth under load. Good agreement was obtained between the two techniques with values of 0.31–0.34 MPa√m and 0.30±0.02 MPa√m, respectively.
Sglavo, Vincenzo Maria, D. Green
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Abstract The threshold stress intensity factor for sub-critical crack growth in fused silica was measured using the interrupted static fatigue (ISF) test and from observations of indentation crack growth under load. Good agreement was obtained between the two techniques with values of 0.31–0.34 MPa√m and 0.30±0.02 MPa√m, respectively.
Sglavo, Vincenzo Maria, D. Green
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2013 IEEE 26th International Conference on Micro Electro Mechanical Systems (MEMS), 2013
This paper reports detailed characterization results of deep reactive ion etching of fused silica with three different masking materials: single-crystal Si, negative photoresist KMPR and SU-8. With an optimized etch recipe, KMPR and SU-8 show higher effective mask selectivity, are easier to integrate and remove than Si, making them better masks for ...
Zongliang Cao +7 more
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This paper reports detailed characterization results of deep reactive ion etching of fused silica with three different masking materials: single-crystal Si, negative photoresist KMPR and SU-8. With an optimized etch recipe, KMPR and SU-8 show higher effective mask selectivity, are easier to integrate and remove than Si, making them better masks for ...
Zongliang Cao +7 more
openaire +1 more source
SPIE Proceedings, 2016
In over 100 years of quartz glass fabrication, the applications and the optical requirements for this type of optical material have significantly changed. Applications like spectroscopy, UV flash lamps, the Apollo missions as well as the growth in UV and IR applications have directed quartz glass development towards new products, technologies or ...
F. Nürnberg, B. Kühn, K. Rollmann
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In over 100 years of quartz glass fabrication, the applications and the optical requirements for this type of optical material have significantly changed. Applications like spectroscopy, UV flash lamps, the Apollo missions as well as the growth in UV and IR applications have directed quartz glass development towards new products, technologies or ...
F. Nürnberg, B. Kühn, K. Rollmann
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High-efficiency fused-silica transmission gratings
Optics Letters, 1997We describe the design, fabrication, and performance of high-efficiency transmission gratings fabricated in bulk fused silica for use in high-power ultraviolet laser systems. The gratings exhibit a diffraction efficiency of 94% in order m=-1 and a damage threshold greater than 13>J/cm( 2) for 3-ns pulses at 351 nm.
H T, Nguyen +5 more
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High-efficiency fused-silica reflection grism
Applied Optics, 2014A fused-silica reflection grism (combination of grating and prism) based on the phenomenon of total internal reflection (TIR), and used in the -1st order, is designed and fabricated. The grism is etched directly into the fused-silica prism, which greatly facilitates the use of the TIR grating as no other angle coupling devices are involved. The grating
Hongchao, Cao +4 more
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Carbon‐doped fused silica glass
International Journal of Applied Glass Science, 2020Abstract Carbon‐doped fused silica glass is fabricated by consolidating zinc stearate‐doped porous silica soot blank. The carbon doping concentration is tunable and a maximum of ~0.3 wt% carbon can be incorporated into densified silica.
Haitao Zhang +8 more
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Very deep fused silica etching
SPIE Proceedings, 2003Fabrication processes for wet chemical and dry etching of hollow capillary leaky optical waveguides in high-purity fused silica for extended path cells for improved optical detection in analytical chemistry are described. We focus on microstructures with etch depths on the order of 80 μm.
Ingo Steingoetter +2 more
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