Microstructure-property relationship in high-strength MgO–Al2O3–SiO2–TiO2 glass-ceramics

Electrical impedance determination of phase transitions in glasses and melts

“…9 BaO * Al 2 O 3 * B 2 O 3 . The batches were made from BaCO 3 (REACHIM, pure), Al(OH) 3 (REACHIM, pure), H 3 BO 3 (VEB Laborchemie Apolda, p.a.) and were melted after mixing in Pt-crucibles at 1500°C for 1:45 h in the case of sample A and at 1500°C for 1:15 h in the case of sample B in an inductive furnace.…”

“…Glass-ceramics are widely used as tough glass-ceramics [1][2][3], sintered glass-ceramics [4,5], machinable [6][7][8] and biocompatible [9][10][11] glass-ceramics and low expansion glass-ceramics [12,13]. Low expansion glass-ceramics are commercially used as cook top panels and telescope mirrors.…”

Ultra-high thermal expansion glass–ceramics in the system MgO/Al2O3/TiO2/ZrO2/SiO2 by volume crystallization of cristobalite

“…From glasses in the system MgO/Al 2 O 3 /TiO 2 /SiO 2 , glass-ceramics with excellent mechanical properties can be produced [1][2][3][4]. The system can be varied by adding components, such as P 2 O 5 [3], ZrO 2 [5], ZnO [6] or B 2 O 3 [1].…”

“…The system can be varied by adding components, such as P 2 O 5 [3], ZrO 2 [5], ZnO [6] or B 2 O 3 [1]. These glass-ceramics reach mechanical strengths of up to 450 MPa, hardnesses of up to 13 GPa and E-moduli of up to 140 GPa [2]. In these glass-ceramics, low quartz solid solutions occur, which can be concluded from their XRD-patterns [2,4].…”

“…These glass-ceramics reach mechanical strengths of up to 450 MPa, hardnesses of up to 13 GPa and E-moduli of up to 140 GPa [2]. In these glass-ceramics, low quartz solid solutions occur, which can be concluded from their XRD-patterns [2,4]. These low quartz solid solutions contain 98-99% SiO 2 , and are obtained by annealing the samples at comparably high temperatures.…”