Der Russschreiber von Siemens &amp; Halske

Siemens, Werner

doi:10.1007/978-3-642-64936-3_50

Cited by 7 publications

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“…Other patents have been issued to Kuzel (23), N. V. Philips' Gloeilampenfabriek (24) and Siemens and Hcl. ]_ske ( 25), who ell imed the production of rare earth metals from the oxides, nitrides, and other r are earth compounds by the use of aluminum and zirconium as reductants.…”

Section: Isc-149mentioning

confidence: 99%

The Preparation of Rare Earth Metals

Spedding¹,

Daane²

1952

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The production of over 400 grams of pure gadolinium metal by reduction of the anhydrous chloride by calcium in tantalum vessels is described; yields were over 97%. The use of the same techniques in an attempt to prepare yttrium metal were partially successful. Keywords Ames Laboratory ABSTRACTThe production of over 400 grams of pure gadolinium metal by reduction of the anhydrous chloride by calcium in tantalum vessels is described; yields were over 97%. The use of the same techniques in an attempt to prepare yttrium metal were partially successful.

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Section: Isc-149mentioning

confidence: 99%

The Preparation of Rare Earth Metals

Spedding¹,

Daane²

1952

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“…One is relevant to high chemical reactivity of every substance at high temperature; i.e., there is a possibility that liquid metals used in the conventional emissivity measurements were contaminated by reactions between melts and containers. These reactions can be minimized using noncontact melting methods, such as levitation [25,26,27] and cold crucible [28] techniques. There are two types of cold crucible technique: levitation and continuous casting.…”

Section: Introductionmentioning

confidence: 99%

Discontinuity in normal spectral emissivity of solid and liquid copper at the melting point

Watanabe

Susa

Nagata

1997

Metall Mater Trans A

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Normal spectral emissivities for solid (ε ,solid ) and liquid (ε ,liquid ) copper at the melting point have been determined, and the discontinuity in ε ,liquid and ε ,solid at the melting point has been discussed. The spectral emissivity was determined by comparing the spectral radiation intensity of the sample to that of the fixed-point blackbody over the wavelength range 550 to 750 nm. The samples and fixed-point blackbody were heated in the continuous casting type cold crucible. Values of ε ,liquid and ε ,solid at 650 nm were 0.167 and 0.108, respectively. The emissivity ratio of ε ,liquid /ε ,solid increased from approximately 1.2 to 1.8 as the wavelength increased in the range 550 to 750 nm. The discontinuity in ε ,liquid and ε ,solid at the melting point has been qualitatively explained by the optical absorption mechanism due to the intraband transition.

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“…The common operating principle for all methods and instruments is the measurement of the rate of heat loss of an electrically heated resistor, which is exposed to the sample gas. Since its invention in the early 1910's, it has become known as a reliable tool for gas analysis [1] with one important draw-back : it is applicable to binary gas mixtures only.…”

Section: Brief Description Of the Methodsmentioning

confidence: 99%

1.2.2 FTTCA - Gasanalyse mit thermisch modulierten Wärmeleitfähigkeits-Sensoren mit Fourier-Analyse des Messsignals

Grienauer¹

2012

Tagungsband

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Der Russschreiber von Siemens & Halske

Cited by 7 publications

References 0 publications

The Preparation of Rare Earth Metals

The Preparation of Rare Earth Metals

Discontinuity in normal spectral emissivity of solid and liquid copper at the melting point

1.2.2 FTTCA - Gasanalyse mit thermisch modulierten Wärmeleitfähigkeits-Sensoren mit Fourier-Analyse des Messsignals

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