Details
| Original language | English |
|---|---|
| Pages (from-to) | 1313-1326 |
| Number of pages | 14 |
| Journal | Zeitschrift fur Physikalische Chemie |
| Volume | 229 |
| Issue number | 9 |
| Early online date | 21 Aug 2015 |
| Publication status | Published - 28 Sept 2015 |
Abstract
A new cell was developed to study the behavior of powders during axial compaction at temperatures up to 950 K and pressures up to 1 GPa. Electrical conductivity of the sample is measured by impedance spectroscopy. Change of sample volume can be simultaneously monitored using linear variable differential transducers. Flushing with gases allows pre-conditioning of material surfaces before compaction. The cell was tested with two different grain size fractions (60-150 μm and 200-250 μm) of lithium trisilicate glass in the brittle deformation range (315 K) and in the partially plastic deformation range (ca. 660 K). The DC conductivity increases linearly with pressure up to 750 MPa at about 660 K. Lower conductivity for the smaller grain size fraction under these conditions is attributed to higher shares of pores between the grains, acting as resistors.
Keywords
- Apparatus, Compaction, Conductivity, Diffusion Pathways, Gases, Glass Transition, Grains, High Pressure, High Temperature, Hydraulic Press, Impedance Spectroscopy, In Situ, Interfaces, Lithium Mobility, Pores, Powders, Silicate Glass, Sintering, Surface, Water Adsorption
ASJC Scopus subject areas
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Zeitschrift fur Physikalische Chemie, Vol. 229, No. 9, 28.09.2015, p. 1313-1326.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A Novel Cell for Studying Ionic Transport in Powders During Compaction and Its Application to Lithium Silicate Glass Powder
AU - Murawski, Dawid
AU - Roß, Sebastian
AU - Behrens, Harald
PY - 2015/9/28
Y1 - 2015/9/28
N2 - A new cell was developed to study the behavior of powders during axial compaction at temperatures up to 950 K and pressures up to 1 GPa. Electrical conductivity of the sample is measured by impedance spectroscopy. Change of sample volume can be simultaneously monitored using linear variable differential transducers. Flushing with gases allows pre-conditioning of material surfaces before compaction. The cell was tested with two different grain size fractions (60-150 μm and 200-250 μm) of lithium trisilicate glass in the brittle deformation range (315 K) and in the partially plastic deformation range (ca. 660 K). The DC conductivity increases linearly with pressure up to 750 MPa at about 660 K. Lower conductivity for the smaller grain size fraction under these conditions is attributed to higher shares of pores between the grains, acting as resistors.
AB - A new cell was developed to study the behavior of powders during axial compaction at temperatures up to 950 K and pressures up to 1 GPa. Electrical conductivity of the sample is measured by impedance spectroscopy. Change of sample volume can be simultaneously monitored using linear variable differential transducers. Flushing with gases allows pre-conditioning of material surfaces before compaction. The cell was tested with two different grain size fractions (60-150 μm and 200-250 μm) of lithium trisilicate glass in the brittle deformation range (315 K) and in the partially plastic deformation range (ca. 660 K). The DC conductivity increases linearly with pressure up to 750 MPa at about 660 K. Lower conductivity for the smaller grain size fraction under these conditions is attributed to higher shares of pores between the grains, acting as resistors.
KW - Apparatus
KW - Compaction
KW - Conductivity
KW - Diffusion Pathways
KW - Gases
KW - Glass Transition
KW - Grains
KW - High Pressure
KW - High Temperature
KW - Hydraulic Press
KW - Impedance Spectroscopy
KW - In Situ
KW - Interfaces
KW - Lithium Mobility
KW - Pores
KW - Powders
KW - Silicate Glass
KW - Sintering
KW - Surface
KW - Water Adsorption
UR - http://www.scopus.com/inward/record.url?scp=84941730360&partnerID=8YFLogxK
U2 - 10.1515/zpch-2015-0583
DO - 10.1515/zpch-2015-0583
M3 - Article
AN - SCOPUS:84941730360
VL - 229
SP - 1313
EP - 1326
JO - Zeitschrift fur Physikalische Chemie
JF - Zeitschrift fur Physikalische Chemie
SN - 0942-9352
IS - 9
ER -