This review highlights the latest research advancements regarding the electrochemical energy conversion and storage application from PCN to PCN-derived carbon materials.
Photocatalytic nitrogen fixation is a desirable approach to future sustainable nitrogen conversion and might consider as a potential alternative to the traditional Haber-Bosch process. However, the activation of nitrogen molecules...
The formation of ZrB2 particles
in Al–Si alloys
not only improves the properties of the Al–Si alloy but also
helps remove B from Si for the preparation of solar-grade Si. A thermodynamic
study was performed to identify the mechanism of ZrB2 formation
in Al–Si alloys. The precipitated B-bearing particles, i.e.,
ZrB
x
, were determined to be ZrB2 via electron probe microanalysis. The composition of the Al–Si
alloy, which could form stable ZrB2 particles, was determined
by measuring and calculating the equilibrium concentrations of Zr
and B and the solubility products of ZrB2 in a Si-saturated
Al–Si alloy at different temperatures. Thereafter, the segregation
coefficients of B between solid Si crystals and the Si-saturated Al–Si
melt with and without Zr addition were estimated thermodynamically.
The mechanism whereby the B removal from Si was enhanced with Zr addition
was as follows: the Zr not only reduced the concentration of B in
the molten Al–Si but also significantly reduced the segregation
coefficient of B between the solid Si and Si-saturated Al–Si
melt.
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