Dissolution rate of silicon nitride ceramics into molten CaO-Al2O3-SiO2 slags

Shoichirou Taira; Yasuyuki Yamasaki; Kunihiko Nakashima; Katsumi Mori

doi:10.1111/j.1151-2916.1997.tb02923.x

Dissolution rate of silicon nitride ceramics into molten CaO-Al₂O₃-SiO₂ slags

Shoichirou Taira, Yasuyuki Yamasaki, Kunihiko Nakashima, Katsumi Mori

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The dissolution rates of silicon nitride (Si₃N₄) ceramics into CaO-Al₂O₃-SiO₂ slags were investigated by using a rotating specimen method in the temperature range of 1773-1873 K. Dissolution rates in the present study increased as the revolution speed and temperature increased and decreased as the SiO₂ content of the slags increased. The nitrogen content of the slags increased after the Si₃N₄ ceramics had been immersed into them. The slags contained two types of nitrogen ions - N^3- and CN^- - because a graphite crucible was used for the experiment. N^3- ions were confirmed in all the slags that were used in the present work; the CN^- content was much lower than that of the N^3- ions, except in the slag without SiO₂. Based on those results, Fick's law of diffusion was used to analyze the dissolution rates. The dissolution mechanism of the Si₃N₄ ceramics into CaO-Al₂O₃-SiO₂ slags has been discussed in this paper.

Original language	English
Pages (from-to)	925-932
Number of pages	8
Journal	Journal of the American Ceramic Society
Volume	80
Issue number	4
DOIs	https://doi.org/10.1111/j.1151-2916.1997.tb02923.x
Publication status	Published - Apr 1997

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1111/j.1151-2916.1997.tb02923.x

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title = "Dissolution rate of silicon nitride ceramics into molten CaO-Al2O3-SiO2 slags",

abstract = "The dissolution rates of silicon nitride (Si3N4) ceramics into CaO-Al2O3-SiO2 slags were investigated by using a rotating specimen method in the temperature range of 1773-1873 K. Dissolution rates in the present study increased as the revolution speed and temperature increased and decreased as the SiO2 content of the slags increased. The nitrogen content of the slags increased after the Si3N4 ceramics had been immersed into them. The slags contained two types of nitrogen ions - N3- and CN- - because a graphite crucible was used for the experiment. N3- ions were confirmed in all the slags that were used in the present work; the CN- content was much lower than that of the N3- ions, except in the slag without SiO2. Based on those results, Fick's law of diffusion was used to analyze the dissolution rates. The dissolution mechanism of the Si3N4 ceramics into CaO-Al2O3-SiO2 slags has been discussed in this paper.",

author = "Shoichirou Taira and Yasuyuki Yamasaki and Kunihiko Nakashima and Katsumi Mori",

year = "1997",

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AU - Taira, Shoichirou

AU - Yamasaki, Yasuyuki

AU - Nakashima, Kunihiko

AU - Mori, Katsumi

PY - 1997/4

Y1 - 1997/4

N2 - The dissolution rates of silicon nitride (Si3N4) ceramics into CaO-Al2O3-SiO2 slags were investigated by using a rotating specimen method in the temperature range of 1773-1873 K. Dissolution rates in the present study increased as the revolution speed and temperature increased and decreased as the SiO2 content of the slags increased. The nitrogen content of the slags increased after the Si3N4 ceramics had been immersed into them. The slags contained two types of nitrogen ions - N3- and CN- - because a graphite crucible was used for the experiment. N3- ions were confirmed in all the slags that were used in the present work; the CN- content was much lower than that of the N3- ions, except in the slag without SiO2. Based on those results, Fick's law of diffusion was used to analyze the dissolution rates. The dissolution mechanism of the Si3N4 ceramics into CaO-Al2O3-SiO2 slags has been discussed in this paper.

AB - The dissolution rates of silicon nitride (Si3N4) ceramics into CaO-Al2O3-SiO2 slags were investigated by using a rotating specimen method in the temperature range of 1773-1873 K. Dissolution rates in the present study increased as the revolution speed and temperature increased and decreased as the SiO2 content of the slags increased. The nitrogen content of the slags increased after the Si3N4 ceramics had been immersed into them. The slags contained two types of nitrogen ions - N3- and CN- - because a graphite crucible was used for the experiment. N3- ions were confirmed in all the slags that were used in the present work; the CN- content was much lower than that of the N3- ions, except in the slag without SiO2. Based on those results, Fick's law of diffusion was used to analyze the dissolution rates. The dissolution mechanism of the Si3N4 ceramics into CaO-Al2O3-SiO2 slags has been discussed in this paper.

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Dissolution rate of silicon nitride ceramics into molten CaO-Al₂O₃-SiO₂ slags

Abstract

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