Effect of controlled crystallization on polaronic transport in phosphate‐based glass‐ceramics

2019 ◽  
Vol 11 (1) ◽  
pp. 97-111 ◽  
Author(s):  
Luka Pavić ◽  
Juraj Nikolić ◽  
Manuel P.F. Graça ◽  
Benilde F.O. Costa ◽  
Manuel A. Valente ◽  
...  
Keyword(s):  
Glass Ceramics ◽  
Controlled Crystallization ◽  
Polaronic Transport

Controlled Crystallization and Properties of Zirconium Fluoride-Based Glass-Ceramics

1996 ◽  
Vol 79 (9) ◽  
pp. 2397-2402 ◽  
Author(s):  
John M. Jewell ◽  
E. Joseph Friebele ◽  
Ishwar D. Aggarwal
Keyword(s):  
Glass Ceramics ◽  
Zirconium Fluoride ◽  
Controlled Crystallization

SECOND HARMONIC GENERATION IN FERROELECTRIC LiTaO3 AND KNbO3 CONTAINING BULK NANO GLASS-CERAMICS

2011 ◽  
Vol 20 (01) ◽  
pp. 49-61 ◽  
Author(s):  
ANAL TARAFDER ◽  
KALYANDURG ANNAPURNA ◽  
REENAMONI SAIKIA CHALIHA ◽  
SRINIBAS SATAPATHY ◽  
VIDYA SAGAR TIWARI ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Power Output ◽  
Applied Field ◽  
Rotation Angle ◽  
Second Harmonic ◽  
Glass Ceramics ◽  
Laser Source ◽  
Ferroelectric Domains ◽  
Controlled Crystallization ◽  
532 Nm

The precursor glasses in (mol%) 25.53Li2O-21.53Ta2O5-35.29SiO2-17.65Al2O3 (LTSA) and 25K2O-25Nb2O5-50SiO2 (KNS) glass systems were prepared by the melt-quench technique. Ferroelectric LiTaO3 (LT) and KNbO3 (KN) crystallites containing bulk nano glass-ceramics have been prepared by controlled crystallization of these precursor glasses respectively. Second harmonic generations (SHG) at 532 nm in both the glass-ceramics have been realized under fundamental beam of Nd3+ :YAG laser source (1064 nm). The SHG power output has been found to increase up to 14 and 62.4 nJ with variation of rotation angle for LT and KN bulk nano glass-ceramics respectively due to orientation of ferroelectric domains under applied field.

Zn2+- Controlled Crystallization and Microstructure in K-Li-Mg-B-Si-Al-F Glass

MRS Advances ◽  
2018 ◽  
Vol 3 (60) ◽  
pp. 3525-3533 ◽  
Author(s):  
Mrinmoy Garai ◽  
Anoop K. Maurya ◽  
Shibayan Roy
Keyword(s):  
Heat Treatment ◽  
Thermal Expansion ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Ceramic ◽  
Vickers Microhardness ◽  
Glass Ceramics ◽  
Network Modifier ◽  
Base Glass ◽  
Controlled Crystallization

Abstract Text:The crystallization of (9-X) K2O-1Li2O-12MgO-10B2O3-40SiO2-16Al2O3-12MgF2-X PbO/BaO/ZnO (X =0/5) composition (wt.%) were studied by means of dilatometry, DSC, XRD, SEM and microhardness analysis. Density of base K-Li-Mg-B-Si-Al-F glass (2.59 g.cm–3) is found to be increased on addition of the network modifier oxides PbO, BaO and ZnO content. Addition of Pb2+, Ba2+ and Zn2+ furthermore increased the glass transition temperature (Tg.). A characteristic exothermic hump is found to be appeared in DSC thermograph at the temperature range 800-950°C; and that is ascribed to the formation of crystalline phase fluorophlogopite mica, KMg3(AlSi3O10)F2. Opaque glass-ceramics were prepared from K-Li-Mg-B-Si-Al-F glasses (with and without containing PbO, BaO and ZnO content) by controlled heat-treatment at 1000°C. Interlocked type microstructure combined of flake like fluorophlogopite mica crystals is obtained in ZnO-containing K-Li-Mg-B-Si-Al-F glass-ceramic; and such microstructural pattern is ascribed to cause large thermal-expansion (>11.5×10-6/K, 50-800°C).Vickers Microhardness of base glass-ceramic (5.12 GPa) is increased when contains ZnO (5.26 GPa). ZnO-containing boroaluminosilicate glass-ceramic is, hence, considered with potential interest as they can exhibit the microcrack resistivity in high temperature recycling operation (like SOFC).

Garnet-type crystallites, their isomorphism and luminescence properties in glass ceramics

CrystEngComm ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 687-693 ◽  
Author(s):  
Yauhen Tratsiak ◽  
Ekaterina Trusova ◽  
Yulia Bokshits ◽  
Mikhail Korjik ◽  
Augustas Vaitkevičius ◽  
...  
Keyword(s):  
Glass Ceramics ◽  
Luminescence Properties ◽  
Controlled Crystallization

Glass ceramics based on Ce-doped garnets were fabricated by the controlled crystallization of CaO(MgO)–Y2O3–Al2O3–GeO2–SiO2–CeO2 glasses. Isomorphism of garnet-type crystallites and its influence on the crystall and luminescence properties was investigated.

scholarly journals High Electronically Conductive Tungsten Phosphate Glass-Ceramics

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2515
Author(s):  
Sanja Renka ◽  
Teodoro Klaser ◽  
Sanja Burazer ◽  
Petr Mošner ◽  
Petr Kalenda ◽  
...  
Keyword(s):  
Solid State ◽  
Phosphate Glass ◽  
Electronic Transport ◽  
Anode Materials ◽  
Glass Ceramics ◽  
Solid State Batteries ◽  
Controlled Crystallization ◽  
Wo3 Phases ◽  
Average Size ◽  
Insight Into

High electronically conductive tungsten phosphate glass-ceramics have been prepared by the controlled crystallization of binary 60WO3–40P2O5 glass in the temperature range from 700 to 935 °C and for 1 to 24 h. The substantial increase in the conductivity for four orders of magnitude is a result of the formation of electronically conductive W2O3(PO4)2 and WO3 phases. At low crystallization temperature the dominant W2O3(PO4)2 phase is created, whereas at 935 °C for 24 h the formation of semiconducting WO3 crystallites of an average size of 80 nm enhances the conductivity to the highest value of 1.64 × 10−4 (Ω cm)–1 at 30 °C. The course of the crystallization and its impact on this exceptionally high electronic transport of binary tungsten phosphate glass-ceramics has been discussed in detail. Since such highly electronically conductive WO3-based glass-ceramics have a great potential as cathode/anode materials in solid state batteries and as electrocatalysts in fuel cells, it is of interest to provide a novel insight into the improvement of their electrical properties.

Transparent Nano Crystalline Glass-Ceramics by Interface Controlled Crystallization

2013 ◽  
Vol 4 (3) ◽  
pp. 174-181 ◽  
Author(s):  
Christian Bocker ◽  
Christian Rüssel ◽  
Isak Avramov
Keyword(s):  
Glass Ceramics ◽  
Nano Crystalline ◽  
Controlled Crystallization

Synthesis of transparent Er-doped fluorotellurite glass–ceramics through controlled crystallization

2016 ◽  
Vol 28 (10) ◽  
pp. 7000-7005 ◽  
Author(s):  
R. Morea ◽  
T. Teddy Fernandez ◽  
J. Fernandez ◽  
R. Balda ◽  
J. Gonzalo
Keyword(s):  
Glass Ceramics ◽  
Controlled Crystallization ◽  
Er Doped
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