Reflectance spectra of surface states in strontium oxide and barium oxide

1976 ◽  
Vol 72 (0) ◽  
pp. 2364 ◽  
Author(s):  
Adriano Zecchina ◽  
Frank S. Stone
Keyword(s):  
Barium Oxide ◽  
Surface States ◽  
Reflectance Spectra ◽  
Strontium Oxide

Effect of strontium oxide on the formation mechanism of dicalcium silicate with barium oxide and sulfur trioxide

2015 ◽  
Vol 27 (7) ◽  
pp. 381-387 ◽  
Author(s):  
Jie Zhang ◽  
Chenchen Gong ◽  
Shoude Wang ◽  
Lingchao Lu ◽  
Xin Cheng
Keyword(s):  
Formation Mechanism ◽  
Sulfur Trioxide ◽  
Barium Oxide ◽  
Dicalcium Silicate ◽  
Strontium Oxide

Translucence Study through New Experimental Hybrid Composites

2014 ◽  
Vol 614 ◽  
pp. 148-154
Author(s):  
Ovidiu Cristian Pastrav ◽  
Ada Gabriela Delean ◽  
Codruta Sarosi ◽  
Laura Silaghi Dumitrescu ◽  
Alexandrina Muntean ◽  
...  
Keyword(s):  
Composite Materials ◽  
Chemical Composition ◽  
Hybrid Composites ◽  
Barium Oxide ◽  
Strontium Oxide ◽  
Hydroxyapatite Nanoparticles ◽  
Quartz Powder ◽  
Type C ◽  
Chromatic Coordinates ◽  
Glass Powders

Translucence parameters for 3 series of experimental hybrid composites were investigated using three-chromatic coordinates such as L* a* b* CHROMA technique using a type C illuminant geometry with the scope of 8o. The materials of each series contain in the same ratio different copolymers and a filler mixture (simple and mixed hydroxyapatite-ZrO2 or SiO2 powders and glass powders with barium oxide, respective strontium oxide, or quartz powder). The purpose was to determine the effect of filler composition of composites on translucence. The analysis shows that these materials have more or less translucence. CHROMA determinations indicate that for the composite that has as filler quartz microparticles anh hydroxyapatite nanoparticles, the translucence registered is higher. Results leading to the idea that chemical composition and the size of inorganic phase are important to obtain translucent composite materials that have very natural in appearance. Keywords: translucence, hybrid composites, CHROMA method.

scholarly journals Влияние микропримесей d-элементов на электронную структуру кристаллитов оксида бария в катодах СВЧ-приборов

2020 ◽  
Vol 46 (3) ◽  
pp. 6
Author(s):  
В.И. Капустин ◽  
И.П. Ли ◽  
А.В. Шуманов ◽  
С.О. Москаленко ◽  
Р.Р. Залялиев ◽  
...  
Keyword(s):  
Electron Spectroscopy ◽  
Oxygen Vacancies ◽  
Barium Oxide ◽  
Surface States ◽  
Microwave Devices ◽  
Surface Oxygen ◽  
Crystallite Surface ◽  
Donor And Acceptor ◽  
Donor Type ◽  
First Time

Using the electron spectroscopy method for chemical analysis, it was experimentally established for the first time that microimpurities of d elements (W, Re, Ni, Pd, Os) in BaO crystallites from the composition of cathodes of microwave devices lead to the formation of donor-type surface states on the crystallite surface, which can partially compensate acceptor-type surface states due to surface oxygen vacancies, which leads to a decrease in the potential barrier on the crystallite surface and, accordingly, to a decrease the magnitude of the work function of the cathode. Key words: cathodes of microwave devices, crystallites of barium oxide, trace elements of d-elements, surface states of donor and acceptor type.

Raman spectra of the barium oxide peroxide and strontium oxide peroxide series

1998 ◽  
Vol 29 (2) ◽  
pp. 109-113 ◽  
Author(s):  
D. de Waal ◽  
K.-J. Range ◽  
M. Königstein ◽  
W. Kiefer
Keyword(s):  
Raman Spectra ◽  
Barium Oxide ◽  
Strontium Oxide
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