scholarly journals Mechanism of powellite crystallite expansion within nano-phase separated amorphous matrices under Au-irradiation

2020 ◽  
Vol 22 (27) ◽  
pp. 15616-15631
Author(s):  
Karishma B. Patel ◽  
Sophie Schuller ◽  
Giulio I. Lampronti ◽  
Ian Farnan
Keyword(s):  
Glass Ceramics ◽  
Residual Matrix ◽  
Phase Glass ◽  
Multi Phase

Effects of Au-irradiation on synthesized multi-phase glass ceramics that have CaMoO4 crystallites within a residual matrix characterized by two Tgs.

Effect of Composition and Processing Conditions on the Formation of Y and Er-SiAlON B and Iw Phase Glass-Ceramics

2003 ◽  
Vol 237 ◽  
pp. 247-252 ◽  
Author(s):  
A. Díaz ◽  
E. Dolekcekic ◽  
Michael J. Pomeroy ◽  
Stuart Hampshire
Keyword(s):  
Glass Ceramics ◽  
Processing Conditions ◽  
Phase Glass

The crystallisation of Er-Si-Al-O-N B-phase glass-ceramics

2005 ◽  
Vol 40 (24) ◽  
pp. 6499-6512 ◽  
Author(s):  
Y. Menke ◽  
L. K. L. Falk ◽  
S. Hampshire
Keyword(s):  
Glass Ceramics ◽  
Phase Glass

Tunable broadband upconversion luminescence from Yb3+/Mn2+ co-doped dual-phase glass ceramics

2020 ◽  
Vol 46 (4) ◽  
pp. 5271-5277 ◽  
Author(s):  
Xueyun Liu ◽  
Cuimei Cheng ◽  
Na Zeng ◽  
Xiaoman Li ◽  
Qing Jiao ◽  
...  
Keyword(s):  
Upconversion Luminescence ◽  
Glass Ceramics ◽  
Dual Phase ◽  
Phase Glass ◽  
Co Doped

Surface characteristics of high-strength MgO–CaO–SiO2−P2O5 glass-ceramics

1994 ◽  
Vol 9 (3) ◽  
pp. 717-722
Author(s):  
Jiin-Jyh Shyu ◽  
Jenn-Ming Wu
Keyword(s):  
Surface Layer ◽  
Glass Ceramics ◽  
High Strength ◽  
Surface Characteristics ◽  
Preferred Orientation ◽  
Apatite Phase ◽  
Bulk Nucleation ◽  
Crystal Preferred Orientation ◽  
Phase Glass ◽  
Step Heat Treatment

Surface-related characteristics (growth of surface layer and crystal preferred orientation) and the resulting mechanical strength of apatite-containing glass-ceramics in the system MgO–CaO–SiO2−P2O5 were investigated. The variations of surface-layer thickness and crystal preferred orientation were explained by a criterion considering both the surface and bulk nucleation of apatite phase. Glass-ceramics with a fairly high strength of 250–410 MPa could be obtained by an appropriate two-step heat treatment. The high strength in the present study is closely related to the growth of the surface layer, which might result in surface compressive-stress.

The Crystallisation of B-Phase Glass-Ceramics

2006 ◽  
Vol 45 ◽  
pp. 30-35 ◽  
Author(s):  
L.K.L. Falk ◽  
Yvonne Menke ◽  
Stuart Hampshire
Keyword(s):  
Heat Treatment ◽  
Phase Structure ◽  
Composition Range ◽  
Glass Ceramics ◽  
Two Dimensional ◽  
Dimensional Network ◽  
Solid Solution Range ◽  
Cation Radius ◽  
Phase Glass ◽  
Random Substitution

Five-component B-phase may be readily formed through the nucleation and crystallisation heat treatment of nitrogen-rich parent glasses with composition (e/o) 35R:45Si:20Al:83O:17N. This paper is focussed on the B-phase structure where R stands for ytterbium, erbium or yttrium. Fine probe EDX analysis in the TEM has shown that the lenticular B-phase crystals take up a substantial range of composition and that the element R is always clearly anti-correlated with silicon. A larger R3+ cation radius moves the B-phase composition range to lower R contents, and as a consequence of the anti-correlation with silicon, the silicon solid solution range goes to higher values. The EDX results lend support to a B-phase structure consisting of two-dimensional network of randomly linked (Si,Al)(O,N)4 tetrahedra between layers of R3+ cations. It is suggested that, in addition to the random substitution of silicon by aluminium in the (Si,Al)(O,N)4 tetrahedra, a locally increased density in the bi-dimensional network of randomly oriented tetrahedra is associated with an increased density of vacancies in the R3+ cation lattice.

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