Composition and crystallization kinetics of R2O–Al2O3–SiO2 glass–ceramics

Microstructure, mechanical, EPR and optical properties of lithium disilicate glasses and glass–ceramics doped with Mn2+ ions

“…The effect of heat-treatment conditions on thermal expansion, phase distribution and mechanical properties were examined by Bengisu and Brow [13]. Various researchers have investigated the crystallization kinetics [14][15][16] of LDS glass-ceramics and also studied metastable phase formation [14,15,17]. The structure of Li 2 O·2SiO 2 (LS2) glass was investigated by Fuss et al [18,19] as a function of pressure and temperature, respectively, using XRD, TEM,IR, Raman and NMR spectroscopy.…”

Crystallization behaviors of R2O–Al2O3–SiO2 glass–ceramics for use as anodic bonding materials

“…1) indicates the glass transition temperature of parent glass, and the sharp exothermic peaks at the onset values of 641 and 850 • C express two crystallization temperatures for this parent glass. Combined with DSC curves and preliminary researches [11][12][13], the nucleate temperature of the parent glass was arranged at 500 • C and the crystallization temperature was increased from 650 to 850 • C. And kept the nucleate temperature (500 • C), nucleate time (2 h) and crystallization time (2 h) all same, the details of heat treatment schedules determined by the result of DSC curve are listed in Table 1. The parent glass was put into furnace and heated according to the scheduled temperature at 3 • C/min, and then they were kept at the setting temperatures for a period of time to nucleation and crystallization.…”

“…The properties of glass-ceramics are dependant on the chemical composition and the thermal history, it is therefore important to gain a thorough understanding of the processes in the crystallization of the glass-ceramics. Shuichi Shoji [9] has made use of the existing Li 2 O-Al 2 O 3 -SiO 2 system glass-ceramics for the silicon-based chip packaging experiments, and Yourong Huang [10] has reported that a kind of lithium aluminosilicate-␤-quartz glass-ceramic contained Na 2 O can be used for low-temperature bonding at 180 • C and 500 V. On the basis of our preliminary works [11][12][13][14], R 2 O-Al 2 O 3 -SiO 2 (RAS) glass-ceramics was used as a cathode substrate material which anodic bonded to stainless steel materials. The composition and crystallization kinetic parameters of RAS parent glass were discussed by using a variety of isothermal and non-isothermal analysis techniques [11].…”

“…Anodic bonding technology was used possible to irreversibly bond different metals and semiconductors to an ion-containing glass by applying a potential between the two samples and heating them at a relatively low-temperature [6]. In recent years, Pyrex glass [7][8] and some glass-ceramics [9][10][11][12][13][14] are commonly used as bonding glass. The properties of glass-ceramics are dependant on the chemical composition and the thermal history, it is therefore important to gain a thorough understanding of the processes in the crystallization of the glass-ceramics.…”

“…The composition and crystallization kinetic parameters of RAS parent glass were discussed by using a variety of isothermal and non-isothermal analysis techniques [11]. The influences derived from parent glass compositions and heat treatment schedules on the main crystal phases and microstructure morphology of the RAS glass-ceramics were analyzed systemically [12][13][14].…”