Viscosity of melt of soda melilite composition at high pressure

Suzuki, Akio

doi:10.2465/jmps.180710

Cited by 2 publications

(3 citation statements)

References 15 publications

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“…Experimental conditions and results ρ h and ρ 0 were adopted as the upper and lower density limits, respectively. viscosity at high pressures is the same as that at ambient pressure (Suzuki et al, 2011;Suzuki, 2019). This study showed that the viscosity of the KTS4 melt decreased with increasing pressure and reached a minimum at around 3.3 GPa.…”

Section: Resultssupporting

confidence: 53%

“…I performed in situ falling-sphere viscometry by using the MAX-III high pressure apparatus at the BL-14C2 and AR-NE7A at the Photon Factory, High Energy Accelerator Research Organization, Tsukuba, Japan. This experimental procedure has been reported elsewhere (Suzuki et al, 2011;Suzuki, 2018Suzuki, , 2019. Glass with a KTS4 composition was synthesized from a mixture of dried powders of reagent-grade oxides (SiO 2 and TiO 2 ) and carbonate (K 2 CO 3 ).…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Pt was used as the sphere material, and its density under the experimental conditions was calculated using the equation of state proposed by Holmes et al (1989). Stokes' equation with Faxén's correction was used to calculate the viscosity (e.g., Suzuki, 2018Suzuki, , 2019. The errors in the viscosity values were mainly derived from uncertainties in X-ray camera resolution, terminal velocities of the falling spheres, sphere diameter, calculated density, and the Faxén's correction factor for the container wall.…”

Section: Experimental Methodsmentioning

confidence: 99%

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Viscosity of K2TiSi4O11 melt at high pressure

Suzuki

2019

Journal of Mineralogical and Petrological Sciences

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The viscosity of alkali titanosilicate melt with a composition of K 2 TiSi 4 O 11 (KTS4) was measured at pressures up to of 7.41 GPa and temperatures up to of 2133 K. The aim of this study is to determine the effect of pressure on the viscosity change and to estimate the relation between structural change and the viscosity change under high pressures. The viscosity decreased up to 3.30 GPa, whereas it increased from 3.30 to 7.41 GPa. The viscosity change above 3.30 GPa is likely caused by the dominance of six-fold coordinated titanium.

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Section: Resultssupporting

confidence: 53%

Section: Experimental Methodsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

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Viscosity of K2TiSi4O11 melt at high pressure

Suzuki

2019

Journal of Mineralogical and Petrological Sciences

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Viscosity Measurements at High Pressures: A Critical Appraisal of Corrections to Stokes' Law

Ashley,

Mookherjee,

et al. 2024

JGR Solid Earth

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Fluids and melts in planetary interiors significantly influence geodynamic processes from volcanism to global‐scale differentiation. The roles of these geofluids depend on their viscosities (η). Constraining geofluid η at relevant pressures and temperatures relies on laboratory‐based measurements and is most widely done using Stokes' Law viscometry with falling spheres. Yet small sample chambers required by high‐pressure experiments introduce significant drag on the spheres. Several correction schemes are available for Stokes' Law but there is no consensus on the best scheme(s) for high‐pressure experiments. We completed high‐pressure experiments to test the effects of (a) the relative size of the sphere diameter to the chamber diameter and (b) the top and bottom of the chamber, that is, the ends, on the sphere velocities. We examined the influence of current correction schemes on the estimated viscosity using Monte Carlo simulations. We also compared previous viscometry work on various geofluids in different experimental setups/geometries. We find the common schemes for Stokes' Law produce statistically distinct values of η. When inertia of the sphere is negligible, the most appropriate scheme may be the Faxén correction for the chamber walls. Correction for drag due to the chamber ends depends on the precision in the sinking distance and may be ineffective with decreasing sphere size. Combining the wall and end corrections may overcorrect η. We also suggest the uncertainty in η is best captured by the correction rather than propagated errors from experimental parameters. We develop an overlying view of Stokes' Law viscometry at high pressures.

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Viscosity of melt of soda melilite composition at high pressure

Cited by 2 publications

References 15 publications

Viscosity of K<sub>2</sub>TiSi<sub>4</sub>O<sub>11</sub> melt at high pressure

Viscosity of K<sub>2</sub>TiSi<sub>4</sub>O<sub>11</sub> melt at high pressure

Viscosity Measurements at High Pressures: A Critical Appraisal of Corrections to Stokes' Law

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