Effect of CaO/SiO2 mass ratio and Li2O on structure and phase precipitation behaviors of CaO-SiO2-MgO-Al2O3 oxide inclusions

被引：8

作者：

Liang, Yujing ^{[1
]}

Shi, Chengbin ^{[1
]}

Huang, Yi ^{[1
]}

Ju, Jiantao ^{[2
]}

Li, Jing ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing USTB, State Key Lab Adv Met, Beijing 100083, Peoples R China

[2] Xian Univ Architecture & Technol, Sch Met Engn, Xian 710055, Peoples R China

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2022年 / 597卷

关键词：

Crystallization; Raman spectroscopy; Structure; Crystalline phase; Oxide inclusion; SILICATE MELTS; RAMAN-SPECTRA; MOLD FLUXES; CRYSTALLIZATION BEHAVIORS; ALUMINOSILICATE GLASSES; HIGH-TEMPERATURE; MGAL2O4; SPINEL; VISCOSITY; AL; SI;

D O I：

10.1016/j.jnoncrysol.2022.121911

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The crystallization behaviors and structure of CaO-SiO2-MgO-Al2O3 melts representing the oxide inclusions in Si-Mn-killed steel were investigated. Raman spectroscopy analysis indicates that the degree of polymerization of oxide melts is lowered with increasing the CaO/SiO2 mass ratios or Li2O contents. Lowering the CaO/SiO2 mass ratios decreases the crystallization temperatures and suppresses crystallization of the oxide melts. Two crystal-line phases precipitate (4CaO.MgO.Al2O3.3SiO2 and 3CaO.MgO.2SiO2 in sequence) during continuous cooling of oxide melts with the CaO/SiO2 mass ratios of 1.55 and 1.15. Only one crystalline phase (4CaO.MgO.Al2O3.3SiO2) was precipitated during the continuous cooling of the oxide melts with CaO/SiO2 mass ratio of 0.77. The crystallization ability of oxide melts was retarded with increasing the Li2O content. The crystalline phases precipitated sequentially are blocky 4CaO.MgO.Al2O3.3SiO2 and faceted 3CaO.MgO.2SiO2 irrespective of the Li2O content of oxide melts.

引用

页数：8

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