Wettability, surface tension, and reactivity of the molten manganese/zirconia-yttria ceramic system

Shinozaki, Nobuya; Mukai, Kusuhiro; Sonoda, Masaki

doi:10.1007/s11661-998-0304-x

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…Consequently, elemental manganese was chosen as the vapor manganese species, and the logarithmic correlations reported by Yaws (1994Yaws ( , 1999 were used for both vapor pressure and surface tension. The reported surface tension and the vapor pressure compared well with the experimental values of Shinozaki et al (1998) and McAdam and Young (1992), respectively. As discussed before, the FLAA measurements confirmed that manganese species were suitably vaporized to atomic manganese within the combustion zone; therefore, all of the manganese species were assumed to be in the elemental vapor phase initially.…”

Section: Aerosol Dynamics Modelsupporting

confidence: 68%

IN SITUANALYSIS OF THE INTERACTION OF MANGANESE VAPOR AND SILICA MICROSPHERES IN A LABORATORY-SCALE COMBUSTOR

Iida

Hahn

2004

Combustion Science and Technology

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To simulate and better understand toxic metal-sorbent particle interactions, laser-induced breakdown spectroscopy (LIBS) was implemented to quantify trace amounts of manganese enriched on the surface of concomitant silica microsphere particles in an optical access laboratory-scale combustion system. Flame atomic absorption measurements verified that introduced manganese nanoparticles were extensively dissociated within the high-temperature region of the H 2 -O 2 -N 2 -air flame. LIBS-based conditional spectral analysis was performed using the Si (I) 288.1 nm atomic emission line with a spectral window containing both silicon and manganese atomic emission lines. The presence of silicon was found to have no effect on the emission intensity of the Mn triplet near 279 nm. The enrichment of manganese on the silica particles was observed in situ using the LIBS technique. The experimental trends agree very well with the theoretical trend predicted by modeling the aerosol system by accounting for nucleation, condensation, and coagulation processes.

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Section: Aerosol Dynamics Modelsupporting

confidence: 68%

IN SITUANALYSIS OF THE INTERACTION OF MANGANESE VAPOR AND SILICA MICROSPHERES IN A LABORATORY-SCALE COMBUSTOR

Iida

Hahn

2004

Combustion Science and Technology

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“…There is no difference for the evaluated values of the surface free energy and the sticking coefficient between the CNT and the SP model. There are several reports for the surface free energy of molten Mn, which is 1.1 J m –2 at 1573–1773 K or 0.94 – 1.18 J m –2 at 1573 K . It has been suggested based on experiments and theoretical considerations that the surface free energy of a solid is 10–30% higher than that of the liquid .…”

Section: Resultsmentioning

confidence: 99%

Direct Observation of the Homogeneous Nucleation of Manganese in the Vapor Phase and Determination of Surface Free Energy and Sticking Coefficient

Kimura

Tanaka

Miura

et al. 2012

Crystal Growth & Design

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We examined the homogeneous condensation of thermally evaporated manganese vapor in an atmosphere of argon gas and determined the temperature and concentration during homogeneous nucleation in the vapor phase by using a Mach−Zehnder type interferometer. Condensation occurred at 660−785 K below the equilibrium temperature and the degree of supersaturation was as high as ∼5 × 10 4 . Using the condensation temperature and size of the condensed particles, which were measured by transmission electron microscopy, we determined the surface free energy and sticking coefficient of Mn at 1106 ± 50 K to be 1.55 ± 0.10 J/m 2 and 0.39 −0.20 +0.39 , respectively, by classical nucleation theory (CNT) and 1.57 ± 0.35 J/ m 2 and 0.42 −0.21 +0.42 , respectively, by a semiphenomenological theory (SP). The nucleation theories predict that the critical nucleus contains only three and six atoms for CNT and SP, respectively, which are fewer than the number of atoms in a unit cell of Mn. This suggests that the polymorphic form of manganese is decided during particle growth rather than during nucleation from the vapor phase.

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Influence of pores on wetting of alumina- and zirconia-base ceramics by molten manganese

Shinozaki

Mukai

Noboritate

et al. 2003

Metall Mater Trans A

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surface roughness measuring device is unsuitable for porous materials. Owing to the pores, R a was a high value of 1.4 m. CommunicationsAlso, two types of zirconia-base substrates were prepared. A dense ZrO 2 -Y 2 O 3 -MnO substrate was prepared using the same procedure as that for making dense MnAl 2 O 4 substrate, Influence of Pores on Wetting ofin which ZrO 2 -3 mol pct (5.1 mass pct)Y 2 O 3 substrate and Alumina-and Zirconia-Base Ceramics molten manganese were reacted. Figure 2(a) shows a scanning electron (SE) micrograph of the surface with no pore.

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Wettability, surface tension, and reactivity of the molten manganese/zirconia-yttria ceramic system

Cited by 4 publications

References 8 publications

IN SITUANALYSIS OF THE INTERACTION OF MANGANESE VAPOR AND SILICA MICROSPHERES IN A LABORATORY-SCALE COMBUSTOR

IN SITUANALYSIS OF THE INTERACTION OF MANGANESE VAPOR AND SILICA MICROSPHERES IN A LABORATORY-SCALE COMBUSTOR

Direct Observation of the Homogeneous Nucleation of Manganese in the Vapor Phase and Determination of Surface Free Energy and Sticking Coefficient

Influence of pores on wetting of alumina- and zirconia-base ceramics by molten manganese

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