CRYSTALLIZATION BEHAVIOR DETERMINED BY DTA METHOD OF GLASS-FORMING MELTS IN THE CaO-Ga//2O//3-GeO//2 SYSTEM.

Masaki Makihara, Junji Hayakawa, Masayuki Nogami, Toru Komiyama, Yoshiro Moriya

Research output: Contribution to journalArticlepeer-review

Abstract

The temperatures of glass transition (T//g), crystallization (T//c) and melting (T//m) during heating were measured for compositions of 50-70 CaO multiplied by (times) 15-40 Ga//2O//3 multiplied by (times) 0-20 GeO//2. The crystallization temperature (T//k) during cooling and the fraction of precipitated crystals were measured from DTA data. Time-temperature-transformation (T-T-T) curves were determined experimentally. A cooling rate (Q)-temperature-transformation (X) (Q-T-T) curve is obtainable by plotting minus Q**n multiplied by (times) ln(1 minus X) vs. temperture, where n depends on crystallization mechanism and other factors and is 4 and 1 or 2 above and below 1150 degree C, respectively.

Original languageEnglish
Pages (from-to)774-780
Number of pages7
JournalYogyo Kyokai Shi/Journal of the Ceramic Society of Japan
Volume93
Issue number12
Publication statusPublished - Dec 1 1985

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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