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FUSED SILICA [8 records]

Record 1 2015-12-07

English

Subject field(s)
  • Chemical Elements and Compounds
Universal entry(ies)
CONT

The adsorption of two polymers(polydimethylacrylamide and polydiethylacrylamide) on the inner surface of a fused silica of capillary(or wafer) was investigated by means of atomic force microscopy(AFM), multi-angle laser light scattering(MALLS) technique, and by measuring the electroosmotic flow(EOF) and contact angle. The AFM images showed that PDMA and PDEA tightly adsorbed on the fused silica surface and formed stable coatings.

French

Domaine(s)
  • Éléments et composés chimiques
Entrée(s) universelle(s)
CONT

[Des physico-chimistes ont réalisé des expériences] sur deux gels, l’un à base de polydiméthylacrylamide (PDMA), l’autre à base de polyacrylamide (PA), le premier ayant une affinité pour la silice, mais pas le second. Quand on étale une goutte de solution de nanoparticules de silice (d’environ 15 nanomètres de diamètre) sur un morceau de PMDA, et que l’on joint ce morceau à un autre en exerçant une pression durant quelques secondes, on obtient une forte adhésion entre les deux pièces. En revanche, avec du gel de PA, les deux morceaux ne se collent pas, même après une pression prolongée [...]

Spanish

Save record 1

Record 2 2011-09-27

English

Subject field(s)
  • Types of Glass
  • Optics
DEF

A translucent or transparent vitreous material consisting almost entirely of silica.

CONT

When fused silica glass [is] intended for optical purposes the raw material used is rock crystal rather than quartz sand.

French

Domaine(s)
  • Sortes de verre
  • Optique
DEF

Verre obtenu à partir du quartz fondu. (Le verre de silice a le plus faible coefficient de dilatation des corps communs, et il est transparent aux rayons ultraviolets).

OBS

Le verre de silice sert à la fabrication des fibres optiques.

CONT

Une des variétés des verres de silice, connues sous le nom de Vycor (USA. c 2), est obtenue par l'attaque chimique d'un de ses composants, le borate de soude par l'acide chlorhydrique.

Spanish

Campo(s) temático(s)
  • Tipos de vidrio
  • Óptica
CONT

Sílice [...] Por fusión da lugar a un material amorfo (vidrio cuarzo), que posee el más bajo coeficiente de dilatación conocido.

Save record 2

Record 3 2011-03-11

English

Subject field(s)
  • Chemical Elements and Compounds
Universal entry(ies)
SiCl4
formula, see observation
10026-04-7
CAS number
DEF

Colorless exceedingly mobile, fuming liquid [with a] suffocating odor.... Uses : Smoke screens; manufacture of ethyl silicate and similar compounds; production of silicones; manufacture of high-purity silica and fused silica glass; source of silicon, silica, and hydrogen chloride; laboratory reagent.

OBS

Chemical formula: SiCl2

French

Domaine(s)
  • Éléments et composés chimiques
Entrée(s) universelle(s)
SiCl4
formula, see observation
10026-04-7
CAS number
OBS

Formule chimique : SiCl2

Spanish

Save record 3

Record 4 2002-06-20

English

Subject field(s)
  • Orbital Stations
CONT

CEO [Crew Earth Observations] is conducted primarily from the nadir-viewing, optical-quality window in the U. S. Destiny Laboratory Module. The window can view 39. 5 degrees forward along the axis of the Station, 32. 2 degrees aft, and a total of 79. 1 degrees from port to starboard. The window is constructed of four panes. The outermost pane, made of fused silica, is designed to withstand orbital debris and can be changed out by extravehicular activity(EVA) if it becomes damaged. The two center panes, also made of fused silica, are the primary and redundant pressure panes. The interior pane, made of glass laminate, is called the scratch or "kick" pane. This pane protects the primary pressure pane from scratches and damage caused by contact with the crew, and has an ultraviolet/infrared(UV/IR) coating to protect the crew and improve picture quality.

OBS

The two middle panes [the redundant pressure pane and the primary pressure pane] serve as the primary and secondary pressure windows, ensuring that the laboratory module stays pressurized. Each of the panes is 31.75 cm (1-1/4 in.) thick.

OBS

redundant pressure pane: term officially approved by the International Space Station official approval Group (ISSOAG).

French

Domaine(s)
  • Stations orbitales
OBS

deuxième vitrage du hublot : terme uniformisé par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).

Spanish

Save record 4

Record 5 2002-06-20

English

Subject field(s)
  • Orbital Stations
CONT

In the summer of 1994 NASA approved adding an optical-quality nadir-viewing window to the U. S. Laboratory Module of the International Space Station. The window can view 39. 5 degrees forward along the axis of the ISS, 32. 2 degrees aft, and a total of 79. 1 degrees from port to starboard. The window is constructed of three panes of fused silica and a fourth protective kick pane made of glass laminate. From outboard to inboard, the panes are : OUTBOARD-An external debris pane that can be changed by an EVA astronaut if damaged. A redundant pressure pane. A primary pressure pane. A scratch or "kick" pane that protects the primary pressure pane from being damaged if the crew or equipment make contact with the window [and] provides a UV-IR coating to protect the crew members. INBOARD-The kick pane is removed during window research operations to take advantage of the full spectrum of radiation that passes through the fused silica panes. When not in use, the window is protected by the kick pane on the inside, and by an external cover on the outside. The external cover can be rotated in or out of position from within the cabin by an astronaut using a hand crank.

OBS

external debris pane: term officially approved by the International Space Station official approval Group (ISSOAG).

French

Domaine(s)
  • Stations orbitales
OBS

vitrage anti-débris : terme uniformisé par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).

Spanish

Save record 5

Record 6 2001-07-16

English

Subject field(s)
  • Orbital Stations
CONT

CEO [Crew Earth Observation] is conducted primarily from the nadir-viewing, optical-quality window in the U. S. Destiny Laboratory Module. The window can view 39. 5 degrees forward along the axis of the Station, 32. 2 degrees aft, and a total of 79. 1 degrees from port to starboard. The window is constructed of four panes. The outermost pane, made of fused silica, is designed to withstand oribital debris and can be changed out by extravehicular activity(EVA) if it becomes damaged. The two center panes, also made of fused silica, are the primary and redundant pressure panes. The interior pane, made of glass laminate, is called the scratch or "kick" pane. This pane protects the primary pressure pane from scratches and damage caused by contact with the crew, and has an ultraviolet/infrared(UV/IR) coating to protect the crew and improve picture quality.

OBS

primary pressure pane: term officially approved by the International Space Station official approval Group (ISSOAG).

French

Domaine(s)
  • Stations orbitales
OBS

premier vitrage du hublot : terme uniformisé par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).

Spanish

Save record 6

Record 7 1996-03-07

English

Subject field(s)
  • Molecular Biology
  • Biotechnology
CONT

Separation were performed with uncoated fused silica capillary tubings(capillary electrophoresis).

French

Domaine(s)
  • Biologie moléculaire
  • Biotechnologie
CONT

Un système d'électrophorèse capillaire est constitué des éléments suivants: - un capillaire de silice fondue d'une longueur comprise entre 20 et 120 cm et d'un diamètre aillant de 10 à 200 pm, sert de support à la migration électrophorétique. La silice est recouverte à l'extérieur d'une fine couche de polymère, en général du polyimide, afin de lui assurer une résistance mécanique.

Spanish

Save record 7

Record 8 1985-07-09

English

Subject field(s)
  • Geology
OBS

consists essentially of measuring the thermal gradient across a sample and obtaining the thermal conductivity of the sample by comparing the gradient across the sample to the gradient across the fused silica discs of known conductivity at the ends of the sample.

French

Domaine(s)
  • Géologie

Spanish

Save record 8

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