The Role of Phase Boundaries in Heterogeneous Solid State Reactions (III). An Experimental Study with Ag2S

1979 ◽  
Vol 83 (1) ◽  
pp. 53-59 ◽  
Author(s):  
H. Schmalzried ◽  
H. Reye
Keyword(s):  
Experimental Study ◽  
Solid State ◽  
Solid State Reactions ◽  
Phase Boundaries ◽  
Heterogeneous Solid

The formation of copper aluminate by solid-state reaction

1991 ◽  
Vol 6 (9) ◽  
pp. 1958-1963 ◽  
Author(s):  
David W. Susnitzky ◽  
C. Barry Carter
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Microprobe Analysis ◽  
Electron Microprobe Analysis ◽  
Substrate Surface ◽  
Alumina Substrate ◽  
Solid State Reactions ◽  
Phase Boundaries ◽  
Copper Aluminate ◽  
Scanning Electron

Solid-state reactions between bulk samples of copper oxide and alumina have been studied using scanning electron microscopy and electron microprobe analysis. Both CuAl2O4 and CuAlO2 were found to form during reactions in air at 1100 °C between CuO powder and single-crystal alumina substrates. The relative position of the CuAl2O4 and CuAlO2 layers was observed to depend on the crystallographic orientation of the surface of the alumina substrate: CuAl2O4 formed in contact with (0001) alumina substrates while CuAlO2 formed when the alumina substrate surface was (110). Faceted Cu–aluminate/alumina phase boundaries were observed to develop when single-crystal alumina rods were reacted with CuO, although the interfaces invariably tended to be wavy.

On the role of twinning in solid-state reactions

2013 ◽  
Vol 58 (3) ◽  
pp. 458-461 ◽  
Author(s):  
M. Sh. Akchurin ◽  
R. M. Zakalyukin
Keyword(s):  
Solid State ◽  
Solid State Reactions

Heterogeneous solid-state reactions between MgO(00l) and iron oxide

1996 ◽  
Vol 54 ◽  
pp. 642-643
Author(s):  
Matthew T. Johnson ◽  
Hermann B. Schmalzried ◽  
C. Barry Carter
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Solid State ◽  
Electric Fields ◽  
Stress Fields ◽  
Solid State Reactions ◽  
Concentration Gradients ◽  
Transmission Electron ◽  
Microscopy Techniques ◽  
Heterogeneous Solid

The transport properties of the diffusing species in heterogeneous solid-state reactions are affected by concentration gradients, temperature gradients, stress fields and electric fields. In the present study, interfacial reactions between thin films of iron oxide and bulk monocrystalline MgO{001}, resulting in the formation of the spinel product MgFe2O4, were carried out separately as a function of time and temperature, applied external electric field and partial pressure of oxygen. Electron microscopy techniques have been utilized to investigate the reaction kinetics and interface morphology.The reaction couples were produced by means of pulsed-laser deposition (PLD). The setup for PLD has been described elsewhere. By depositing high-quality oxide films on bulk substrates, a well controlled geometry can be fabricated which is conducive to the study of fundamental processes in solid-state reactions. In producing the reaction couples, 600nm of iron oxide was deposited on monocrystalline MgO{001}. The reaction couples were then reacted under varying conditions and analyzed, using both scanning (SEM) and transmission electron microscopy (TEM).

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