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On the Preparation of Hard Oxide Films with Precisely Controlled Thickness on Evaporated Aluminum Mirrors*

G. Hass1949-07-01Journal of the Optical Society of America

By increasing the thickness of the natural oxide film on evaporated aluminum mirrors, a much better surface protection can be achieved. Heat treatment in air is not practical for producing protective coatings on aluminum because the temperature required is more than 400°C and oxide films formed at this temperature are…

Laser Material Processing TechniquesOptical Coatings and GratingsAnodic Oxide Films and Nanostructures

LOW‐TEMPERATURE VISCOSITY OF ALKALI SILICATE GLASSES*

James P. Poole1949-07-01Journal of the American Ceramic Society

A bstract Using an improved technique, precision measurements of viscosities in the annealing range of temperature were made on sodium, potassium, and sodium‐potassium silicate glasses containing from 10 to 40 mol % alkali. The viscosities of certain of those glasses that contain both Na 2 O and K 2 O reach minima, an…

Glass properties and applicationsNuclear materials and radiation effectsRecycling and utilization of industrial and municipal waste in materials production

The Viscosity of Suspensions of Spheres.

James V. Robinson1949-07-01The Journal of Physical Chemistry

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Viscosity of Suspensions of Spheres.James V. RobinsonCite this: J. Phys. Chem. 1949, 53, 7, 1042–1056Publication Date (Print):July 1, 1949Publication History Published online1 May 2002Published inissue 1 July 1949https://doi.org/10.1021/j150472a007RIGHTS & PERMISSIONSArt…

Material Dynamics and PropertiesForce Microscopy Techniques and ApplicationsComposite Material Mechanics

Über die Kristallstrukturen von Ga2S3, Ga2Se3 und Ga2Te3

Harry Hahn、Wilhelm Klingler1949-07-01Zeitschrift für anorganische Chemie

Abstract Ga 2 S 3 kristallisiert in zwei Modifikationen; einer α‐Form mit Zinkblendegitter, a = 5,17 1 Å, die bei tiefen Temperaturen stabil ist, und einer Hochtemperaturmodifikation (β) mit Wurtzitstruktur, a = 3,67 8 Å; c = 6,01 6 Å; c/a = 1,63 6 . Die Umwandlungstemperatur liegt zwischen 550 und 600° C. 2. Ga 2 Se…

Inorganic Chemistry and MaterialsSolid-state spectroscopy and crystallographyCrystal Structures and Properties

The Preparation and Properties of the Group IV-B Metal Borohydrides

Henry R. Hoekstra、J. J. Katz1949-07-01Journal of the American Chemical Society

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Preparation and Properties of the Group IV-B Metal BorohydridesH. R. Hoekstra and J. J. KatzCite this: J. Am. Chem. Soc. 1949, 71, 7, 2488–2492Publication Date (Print):July 1, 1949Publication History Published online1 May 2002Published inissue 1 July 1949https://pubs.acs…

Boron and Carbon Nanomaterials ResearchHydrogen Storage and MaterialsMXene and MAX Phase Materials

The Production of Diffraction Gratings: II The Design of Echelle Gratings and Spectrographs1

George R. Harrison1949-07-01Journal of the Optical Society of America

In seeking to circumvent the difficulties that have limited production of ruled gratings having resolving powers in excess of 400,000, it is observed that resolving power at a given wave-length depends only on the ruled width of the grating and the angles of illumination and observation, and not specifically on the nu…

Photonic and Optical DevicesOptical Coatings and GratingsSemiconductor Lasers and Optical Devices