منابع مشابه
Material Science
• Optical property of a material is defined as its interaction with electro-magnetic radiation in the visible. • Electromagnetic spectrum of radiation spans the wide range from γ-rays with wavelength as 10 m, through x-rays, ultraviolet, visible, infrared, and finally radio waves with wavelengths as along as 10 m. • Visible light is one form of electromagnetic radiation with wavelengths ranging...
متن کاملOff - Peak Cooling Using Phase Change Material
The electric utilities in the United States are faced with continued rapid growth in electrical demand. The traditional response to growth in demand has been the expansion of generating capacity. However , economic, environmental, and scheduling constraints will combine to make adequate expansion difficult, if not impossible, in the 1980's. This thesis examines load management as an alternative...
متن کاملCrystallography in Material Science
We have investigated the nuclear density distributions in LaGaO3based perovskites, LaGaO3 (LG), (La0.9Sr0.1)GaO3(LSG), La(Ga0.9Mg0.1)O3(LGM), and (La0.8Sr0.2)(Ga0.8Mg0.15Co0.05)O3(LSGMC), to elucidate the ionic conduction path and disorder of oxide ions at elevated temperatures. Neutron diffraction data were collected in the temperature range from 26 to 1405oC in air, using a diffractometer HER...
متن کاملMaterial Science Prof . Satish
Failure can be defined, in general, as an event that does not accomplish its intended purpose. Failure of a material component is the loss of ability to function normally. Components of a system can fail one of many ways, for example excessive deformation, fracture, corrosion, burning-out, degradation of specific properties (thermal, electrical, or magnetic), etc. Failure of components, especia...
متن کاملCrystallography in Material Science
The compositions and purity of polycrystalline powder samples of Nd0.7Sr0.3 Mn1-x MgxO3 (x = 0.0, 0.1, 0.2, 0.3), LaCr1-xMnxO3 (x = 0.0, 0.1, 0.2, 0.3) and La1-x Ndx Cr0.5 Mn0.5 O3 (x = 0.0, 0.15, 0.2) were characterized by X-ray diffraction and chemical analysis. The magnetic properties were investigated by neutron powder diffraction technique and magnetization measurement using a SQUID. All t...
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ژورنال
عنوان ژورنال: Science
سال: 2005
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.310.5753.1391d