Phase separation behavior and coloring of coating glasses for sanitary ware

Yoshikazu Tomioka, Sohei Sukenaga, Noritaka Saito, Kunihiko Nakashima

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


We investigated the phase separation behavior of multi-component oxide glasses for coating layer of sanitary wares, and the holding time dependence of the microstructure and the coloring nature of phase separated glasses. Two kinds of multi-component silicate glasses (CaO-SiO2-Al2O 3-MgO-ZnO-K2O-Na2O system) were employed, which had different CaO/SiO2 ratio. Glass A has higher CaO/SiO2 ratio, and glass B has lower CaO/SiO2. Quenched glasses that were pre-melted at 1550 °C for 90 min in advance, were isothermally held at 800∼1100 °C for 0.5∼2 h by the hot-thermocouple. The microstructure of phase-separated glass was observed by using FE-SEM on the polished section. It was found that the glass A and B heat-treated at given temperatures indicated a spinodal and a binodal type phase separation, respectively. Moreover, the glass A was found to have the larger microstructure of phase separation, which caused whitish color. In contrast, the glass B revealed the finer binodal phase separation that resulted in a bluish phase separated glass.

Original languageEnglish
Article number112021
JournalIOP Conference Series: Materials Science and Engineering
Issue numberSYMPOSIUM 8
Publication statusPublished - 2011
Externally publishedYes
Event3rd International Congress on Ceramics, ICC3 - Osaka, Japan
Duration: 2010 Nov 142010 Nov 18

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)


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