Development of magnesium‐aluminum‐silicate glass‐ceramics nucleated with Nb 2 O 5

2019 ◽  
Vol 11 (1) ◽  
pp. 155-169 ◽  
Author(s):  
Tobias Benitez ◽  
Alexander Veber ◽  
Kaline Pagnan Furlan ◽  
Lara Barros Rebouças ◽  
Dominique Ligny ◽  
...  
Keyword(s):  
Silicate Glass ◽  
Glass Ceramics ◽  
Aluminum Silicate ◽  
Magnesium Aluminum Silicate

Dependence of Dielectric Behaviour of Magnesium Aluminum Silicate Glass-Ceramics on Alumina Content

2007 ◽  
Vol 280-283 ◽  
pp. 941-946
Author(s):  
Govind P. Kothiyal ◽  
Madhumita Goswami ◽  
R. Mishra ◽  
B.I. Sharma ◽  
J.V. Yakhmi
Keyword(s):  
Dielectric Constant ◽  
Silicate Glass ◽  
Glass Ceramics ◽  
Alumina Content ◽  
Dielectric Behaviour ◽  
Aluminum Silicate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Magnesium Aluminum Silicate ◽  
Constant E

Magnesium aluminum silicate glass-ceramics were prepared by controlled heat treatment of base glass. The Al2O3 content was varied from 7.58 to 14.71mol % keeping total Mg content almost constant in the form of (MgO+MgF2). The crystalline phases were identified by X-ray diffraction technique while scanning electron microscopy was employed for finding the microstructure in the sample. The dielectric behaviour of the material was studied over the frequency range from 10-107 Hz and in the temperature range from 603 to 793K using impedance analyzer. X- ray diffraction studies revealed the formation of pure and mixed phases of MgSiO3, fluorophlogopite and Mg2SiO4 depending upon the alumina content. Mixed phase material has higher dielectric constant (e′), loss factor (e²) and dissipation factor (tand) than the single-phase material at lower frequencies. Dielectric constant (e′) decreases with frequency rather sharply up to 104Hz, and then remains nearly constant at higher frequencies up to 107Hz. However, tand first increases and then decreases with frequency passing through a broad peak. In all the cases e¢ and tan d are seen to increase with temperature. The activation energies for dipolar relaxation were calculated for all samples and were found to vary from1.77Joule/mole to 13.82Joule/mole with variation of alumina from 7.58 to 14.71mol %.

Dielectric measurement on magnesium aluminum silicate glass–ceramics prepared by different routes

2002 ◽  
Vol 57 (3) ◽  
pp. 619-627 ◽  
Author(s):  
Mahantappa S Jogad ◽  
Madhumita Goswami ◽  
Arjun Sarkar ◽  
Tahir Mirza ◽  
Lingappa A Udachan ◽  
...  
Keyword(s):  
Silicate Glass ◽  
Glass Ceramics ◽  
Dielectric Measurement ◽  
Aluminum Silicate ◽  
Magnesium Aluminum Silicate

Preparation of Highly Concentrated Binder Suspensions Based on Magnesium Aluminum Silicate Glass

2016 ◽  
Vol 56 (6) ◽  
pp. 601-604
Author(s):  
E. I. Suzdal’tsev ◽  
T. V. Zaichuk ◽  
Yu. S. Ustinova ◽  
S. N. Vandrai
Keyword(s):  
Silicate Glass ◽  
Aluminum Silicate ◽  
Magnesium Aluminum Silicate

Crystal structure and wave-transparent properties of lithium aluminum silicate glass-ceramics

2018 ◽  
Vol 44 (12) ◽  
pp. 14896-14900 ◽  
Author(s):  
Long Xia ◽  
Yanan Yang ◽  
Xinyu Zhang ◽  
Jian Zhang ◽  
Bo Zhong ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Silicate Glass ◽  
Glass Ceramics ◽  
Aluminum Silicate ◽  
Lithium Aluminum

Development of Machinable Glass-Ceramic without Nucleating Agents

2015 ◽  
Vol 830-831 ◽  
pp. 436-439
Author(s):  
C. Venkateswaran ◽  
Amarnath Padala ◽  
H. Sreemoolanadhan ◽  
M.R. Ajith ◽  
Mariamma Mathew ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Glass Ceramic ◽  
Glass Ceramics ◽  
Heat Treatment Condition ◽  
Aluminum Silicate ◽  
Nucleating Agents ◽  
Treatment Conditions ◽  
Magnesium Aluminum Silicate ◽  
Optimum Heat ◽  
Alumino Silicate

Mica containing glass-ceramic is prepared by crystallizing magnesium alumino silicate glass between 600°C and 1100°C without the use of any additives or nucleating agents. Effects of ceramization heat treatment conditions on phase constitution and microstructures are analyzed using XRD and HRSEM respectively. Developed glass-ceramics have been analyzed for its microhardness and machinability. Optimum heat treatment condition for achieving uniformly distributed fluorophlogopite phase essential for machinability, and at the same time, magnesium aluminum silicate phase for increasing the hardness, is presented.

Study of phase transformations in titanium-containing magnesium-aluminum silicate glasses and glass-ceramics for diffuse reflectors

2002 ◽  
Vol 69 (8) ◽  
pp. 588 ◽  
Author(s):  
A. V. Bortkevich ◽  
O. S. Dymshits ◽  
A. A. Zhilin ◽  
A. Yu. Polushkin ◽  
M. Ya. Tsenter ◽  
...  
Keyword(s):  
Phase Transformations ◽  
Glass Ceramics ◽  
Silicate Glasses ◽  
Aluminum Silicate ◽  
Magnesium Aluminum Silicate

Preparation, structural and thermo-mechanical properties of lithium aluminum silicate glass–ceramics

2009 ◽  
Vol 35 (4) ◽  
pp. 1661-1666 ◽  
Author(s):  
A. Arvind ◽  
Rakesh Kumar ◽  
M.N. Deo ◽  
V.K. Shrikhande ◽  
G.P. Kothiyal
Keyword(s):  
Mechanical Properties ◽  
Silicate Glass ◽  
Glass Ceramics ◽  
Aluminum Silicate ◽  
Lithium Aluminum
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