Melting point of MgO

Journal of Applied Physics

Volumn 90, Issue 7, 2001, Pages 3325-3331

  Ronchi, Claudio ^a   Sheindlin, Mikhail ^a  

^a JOINT RESEARCH CENTRE   (Italy)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0035477566     PISSN: 00218979     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1398069     Document Type: Article

References (24)

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3. By definition, the brightness temperature of an opaque gray body (with emissivity ε<1) decreases with wavelength, while in a semitransparent material with constant apparent emissivity ℰ>1, the trend is opposite. This is, however, a merely formal property, since in this case ℰ has no univocal physical significance.
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7. m was caused by the dramatic sublimation of MgO. Though he recognized that the atmospheric conditions in the experiments performed by Kanolt were more favorable, he did not believe that they were sufficient to ensure a correct measurement of the melting temperature.
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16. 2: though its volatility is approximately 50 times lower than that of MgO, its melting temperature, determined from visual inspection of quenched samples, was initially believed to be 2800 K, instead of the correct value of 3150 K.
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19. The albedo of a pure MgO layer obtained from deposit of soot of magnesium burning in air is so high that, under exposure to sunlight, its brilliance is comparable to that of a blackbody between 1500 and 1800 K. Depending on impurity content and particle size, ℛ may vary from approximately 0.80 to 0.97. MgO is, therefore, often used as a white standard.
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