Immobilization of simulated 137CsCl using metakaolin based geopolymers obtained by hybrid hydrothermal-sintering processes

In the last decades, Raman spectroscopy has become an important tool to identify and investigate minerals, gases, glasses, and organic material at room temperature. In combination with high-temperature and high-pressure devices, however, the in situ investigation of mineral transformation reactions and their kinetics is nowadays also possible. Here, we present a novel approach to in situ studies for the sintering process of silicate ceramics by hyperspectral Raman imaging. This imaging technique allows studying high-temperature solid-solid and/or solid-melt reactions spatially and temporally resolved, and opens up new avenues to study and visualize high-temperature sintering processes in multi-component systems. After describing in detail the methodology, the results of three application examples are presented and discussed. These experiments demonstrate the power of hyperspectral Raman imaging for in situ studies of the mechanism(s) of solid-solid or solid-melt reactions at high-temperature with a micrometer-scale resolution as well as to gain kinetic information from the temperature- and time-dependent growth and breakdown of minerals during isothermal or isochronal sintering.

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Thermoelectric Properties of n-Type 90% Bi2Te3+10%Bi2Se3 Thermoelectric Materials Produced by Melt Spinning Method and Sintering

Materials Science Forum ◽

10.4028/www.scientific.net/msf.534-536.161 ◽

2007 ◽

Vol 534-536 ◽

pp. 161-164 ◽

Cited By ~ 3

Author(s):

Taek Soo Kim ◽

Byong Sun Chun

Keyword(s):

Solid Solutions ◽

Thermoelectric Materials ◽

Figure Of Merit ◽

Melt Spinning ◽

Bending Strength ◽

Sintering Temperature ◽

Thermoelectric Figure Of Merit ◽

Vacuum Sintering ◽

Thermoelectric Figure ◽

Sintering Processes

N-type Bi2Te3-Sb2Te3 solid solutions doped with CdCl2 was prepared by melt spinning, crushing and vacuum sintering processes. Microstructure, bending strength and thermoelectric property were investigated as a function of the doping quantity from 0.03wt.% to 0.10wt.% and sintering temperature from 400oC to 500oC, and finally compared with those of conventionally fabricated alloys. The alloy showed a good structural homogeneity as well as bending strength of 3.88Kgf/mm2. The highest thermoelectric figure of merit was obtained by doping 0.03wt.% and sintering at 500oC.

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Sintering processes of two nanoparticles: A study by molecular dynamics simulations

Philosophical Magazine Letters ◽

10.1080/095008396181073 ◽

1996 ◽

Vol 73 (1) ◽

pp. 27-33 ◽

Cited By ~ 188

Author(s):

Huilong Zhu

Keyword(s):

Molecular Dynamics ◽

Molecular Dynamics Simulations ◽

Dynamics Simulations ◽

Sintering Processes

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The Effect of Sintering Processes on the Properties of Mn-F Doped PZT Ceramics

Integrated Ferroelectrics ◽

10.1080/10584580490460394 ◽

2004 ◽

Vol 62 (1) ◽

pp. 61-67 ◽

Cited By ~ 4

Author(s):

B. CHERDHIRUNKORN ◽

D. A. HALL

Keyword(s):

Pzt Ceramics ◽

Sintering Processes

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Test Method of Current Leakage for Dielectric Paste

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.220-223.1573 ◽

2012 ◽

Vol 220-223 ◽

pp. 1573-1576

Author(s):

Zhi Hong Hou

Keyword(s):

Glass Substrate ◽

Dielectric Layer ◽

Screen Printing ◽

Test Method ◽

Conducting Layer ◽

Current Leakage ◽

Test Circuit ◽

Conductive Line ◽

Hybrid Microcircuit ◽

Sintering Processes

A test method of current leakage for dielectric paste was proposed by simulating the application processes of dielectric paste for manufacturing the dielectric layer in the multilayer thick film hybrid microcircuit. That is, by screen printing and sintering processes, the sliver conducting layer was fabricated on the surface of glass substrate, and then dielectric layer, finally the glass substrate sample with conducting layer and dielectric layer was dipped in 5 Wt% NaCl aqueous solution. The conductive line was soldered on the silver conducting layer to form the test circuit, and powered with 5 volts direct power, the current in the test circuit was taken as the current leakage of the dielectric paste. The method may be used to evaluate the current leakage of dielectric paste.

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Effect of binder composition on debinding and sintering processes of injection molded Fe–8Ni mixed powders

Journal of Materials Research ◽

10.1557/jmr.1996.0144 ◽

1996 ◽

Vol 11 (5) ◽

pp. 1127-1132 ◽

Cited By ~ 2

Author(s):

Junjiro Takekawa

Keyword(s):

Injection Molded ◽

Binder Composition ◽

Debinding Process ◽

Sintering Processes

The debinding process of injection-molded compacts of Fe–8Ni mixed powders, containing binders of different ratios of polymers to wax, was investigated. The effect of binder compositions and debinding conditions on the sinterability of the compacts were also studied. Distortions produced in the debinding processes of the compacts were minimized for the case where a ratio of polymer to the total binder contents was 0.35. In the case of the compacts debound in air, sintered densities increased by increasing the debinding temperature up to 350 °C, then decreased sharply for higher debinding temperatures. In the compacts debound in N2, sintered densities were almost independent of the debinding temperature. The sinterability of the compacts debound in N2 was inferior to that debound in air.

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