TY - JOUR
T1 - Chemical reaction between lead-free multicomponent alkali borosilicate glass frit and hematite during heat treatment
AU - Hashimoto, Hideki
AU - Terasawa, Akane
AU - Inada, Hirofumi
AU - Takaishi, Taigo
AU - Fujii, Tatsuo
AU - Asoh, Hidetaka
N1 - Funding Information:
We thank Mizuki Ito for conducting preliminary experiments. This study was financially supported by the Moritani Scholarship Foundation in Japan .
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/1
Y1 - 2021/1
N2 - A mixture of a lead-free multicomponent alkali borosilicate glass frit containing zinc ions and hematite was heat-treated under various conditions to elucidate the reaction between the two components, which is essentially important for controlling the color of red overglaze enamels. Above the glass transition temperature, the interaction between the frit fluid and hematite was evident, as the viscosity of the frit decreased. Moreover, hematite dissolved, the iron ions diffused into the glass matrix and they precipitated on residual hematite, resulting in enhanced crystal growth through Ostwald ripening. Concurrently, the iron and zinc ions reacted to form zinc ferrite. During cooling, the supersaturated iron ions were consumed for precipitation of hematite and zinc ferrite. Because frit and hematite dramatically react during heat treatment, conventional modification of hematite alone is insufficient. Development of the frit exhibiting low reactivity toward hematite through precise control of physical properties is a future challenging issue.
AB - A mixture of a lead-free multicomponent alkali borosilicate glass frit containing zinc ions and hematite was heat-treated under various conditions to elucidate the reaction between the two components, which is essentially important for controlling the color of red overglaze enamels. Above the glass transition temperature, the interaction between the frit fluid and hematite was evident, as the viscosity of the frit decreased. Moreover, hematite dissolved, the iron ions diffused into the glass matrix and they precipitated on residual hematite, resulting in enhanced crystal growth through Ostwald ripening. Concurrently, the iron and zinc ions reacted to form zinc ferrite. During cooling, the supersaturated iron ions were consumed for precipitation of hematite and zinc ferrite. Because frit and hematite dramatically react during heat treatment, conventional modification of hematite alone is insufficient. Development of the frit exhibiting low reactivity toward hematite through precise control of physical properties is a future challenging issue.
KW - Chemical reaction
KW - Hematite
KW - Ion diffusion
KW - Lead-free frit
KW - Red overglaze enamel
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U2 - 10.1016/j.jeurceramsoc.2020.08.037
DO - 10.1016/j.jeurceramsoc.2020.08.037
M3 - Article
AN - SCOPUS:85089991179
VL - 41
SP - 823
EP - 830
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 1
ER -