Crystallization and microstructure in K2O substituted SiO2-MgO-Al2O3-Li2O-AlPO4 glass-ceramics

被引：6

作者：

Garai, Mrinmoy ^{[1
]}

Singh, Chandra K. ^{[1
]}

Rout, Sanjib K. ^{[2
]}

机构：

[1] Aeronaut Qual Assurance AQA, Off Addit Director Gen, Koraput, India

[2] Hindustan Aeronaut Ltd HAL, Cent Lab, Koraput, India

来源：

SOLID STATE COMMUNICATIONS | 2022年 / 350卷

关键词：

Glass; Crystallizaion; Glass-ceramic; Microstructure; FLUOROPHLOGOPITE;

D O I：

10.1016/j.ssc.2022.114758

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The substitution of K+ ion by Ca2+ or Sr2+ in K2O-SiO2-MgO-Al2O3-B2O3-MgF2-Li2O-AlPO4 glass is executed and the relevant effects on crystallization and microstructure are explored. The glass monoliths obtained by single-step melt-quenching at 1500 +/- 10 degrees C were transparent in nature. Density of base glass was evaluated as 2.66 +/- 0.03 g cm(-3) and found to be decreased by in presence of CaO or SrO. Opaque glass-ceramics were derived from the transparent glasses by controlled heat-treatment at 1000 +/- 10 degrees C and the predominant crystalline phase was identified as fluorophlogopite mica, KMg3AlSi3O10F2 by X-ray diffraction. Field emission scanning electron microscopy revel that the plate like fluorophlogopite mica crystals predominated in base glass-ceramic (without CaO or SrO doped) but changed to nanocrystalline morphology containing droplet like spherical shaped mica crystallites (average size 200-400 nm) on addition of CaO and SrO. Highest density (=2.74 +/- 0.03 g.cm-3) observed for SrO containing glass-ceramic is attributed to the nanocrystalline morphology.

引用

页数：5

共 27 条

[11] Rare earth ion controlled crystallization of mica glass-ceramics [J].

Garai, Mrinmoy ;

Karmakar, Basudeb .

JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 678 :360-369

[12] Structural effects of Zn+2/Mg+2 ratios on crystallization characteristics and microstructure of fluorophlogopite mica-containing glass-ceramics [J].

Garai, Mrinmoy ;

Sasmal, Nibedita ;

Molla, Atiar R. ;

Karmakar, Basudeb .

SOLID STATE SCIENCES, 2015, 44 :10-21

[13] MACHINABLE GLASS-CERAMICS BASED ON TETRASILICIC MICA [J].

GROSSMAN, DG .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1972, 55 (09) :446-&

[14] Crystallization of sodium fluormica Na(Mg, Zn, Ca)2.5Si4O10F2 glasses [J].

Hamzawy, EMA ;

Darwish, H .

MATERIALS CHEMISTRY AND PHYSICS, 2001, 71 (01) :70-75

[15]

Hoche T., 1998, ACTA MATERIALLIA, VPII

[16]

Hoda S.N., 1982, ADV CERAM, P287

[17]

Höland W, 2001, ADV ENG MATER, V3, P768, DOI 10.1002/1527-2648(200110)3:10<768::AID-ADEM768>3.0.CO

[18]

2-T

[19]

Kodama T, 1999, J MATER CHEM, V9, P2475

[20] Effects of mixed alkaline earth oxides additive on crystallization and structural changes in borosilicate glasses [J].

Liu, Shimin ;

Zhao, Gaoling ;

Ying, Hao ;

Wang, Jianxun ;

Han, Gaorong .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 2008, 354 (10-11) :956-961

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