書誌事項
- タイトル別名
-
- Variation of Glass-Forming Regions with Cooling Rate in the SiO<sub>2</sub>-Li<sub>2</sub>O System
- SiO2 Li2Oケイ ユウエキ ノ レイキャク ソクド ニ ヨル ガラスカ
この論文をさがす
抄録
The glass-forming regions in the SiO2-Li2O system have been determined by cooling the melts containing 35-81mol% SiO2 from liquidus temperature to room temperature at cooling rates; Q1=4×10-2, Q2=1.4×10-1, Q3=4×10-1, Q4=3, Q5=19, Q6=4.4×102 and Q7≅105K/s. In the composition range SiO2=35-75mol%, the glass-forming region expanded with increasing cooling rate, and the critical cooling rate Q* decreased with increasing silica content, and reached a minimum at SiO2=75mol%. Phase separation was observed in the composition range SiO2>70mol% at cooling rates Q2-Q5. However, the region in which the phase separation takes place decreased with increasing cooling rate, yet persisting in high silica compositions. A linear dependence was found in the log-log plot of liquidus viscosity ηL against Q*. When the logQ*-logηL diagrams are compared with the system B2O3-Li2O, the system SiO2-Li2O system was found to have a higher liquidus viscosity than B2O3-Li2O system for a given critical cooling rate. The difference in the glass-forming ability between the two systems was analyzed in terms of kinetic parameters based on the crystallization formula, and the poor glass-forming ability in the system SiO2-Li2O in comparison with B2O3-Li2O system was elucidated to be due to a smaller fusion entropy in the former. This implies a smaller structural difference upon crystallization of the silicate in comparison with that of the borate.
収録刊行物
-
- 窯業協會誌
-
窯業協會誌 92 (1061), 20-24, 1984
公益社団法人 日本セラミックス協会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390282680194397952
-
- NII論文ID
- 110002312956
-
- NII書誌ID
- AN00245650
-
- ISSN
- 18842127
- 00090255
- http://id.crossref.org/issn/00090255
-
- NDL書誌ID
- 2973017
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可