PbO-free glasses for low temperature packaging

Brow, Richard K.; Bencoe, Denise N.; Tallant, D. R.

doi:10.2172/534533

Cited by 18 publications

(27 citation statements)

References 24 publications

(19 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5. By the doping of niobium ion into the amorphous TiP 2 O 7 , the relative Raman intensity at 337 and 762 cm −1 corresponding to P O P bending and symmetric stretching modes decreased [14], while the Nb O stretching mode at 645 cm −1 increased [13,15,16]. Therefore, the increase in the intensity of this Nb O band corresponds to the promotion of non-bridging oxygen species in the samples.…”

Section: Resultsmentioning

confidence: 98%

New sunscreen materials based on amorphous cerium and titanium phosphate

Masui

Hirai

Imanaka

et al. 2006

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 98%

New sunscreen materials based on amorphous cerium and titanium phosphate

Masui

Hirai

Imanaka

et al. 2006

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…The observed increase in the bulk density and T g was believed to be due to the formation of TiO 5 or TiO 4 structural units and the formation of P-O-Ti bonds. This forms ionic cross-linking between the non-bridging oxygen of two different chains that strengthen the glass structure [27][28][29]. The density (q) and T g for CNP glass with 40 mol% CaO is significantly higher than the comparable composition with 30 mol% CaO (2.58 ± 0.002 g cm À3 , 383 ± 1°C).…”

Section: Discussionmentioning

confidence: 97%

Doping of a high calcium oxide metaphosphate glass with titanium dioxide

Neel

Chrzanowski

Valappil

et al. 2009

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

a b s t r a c tThis study investigates the effect of doping a high calcium oxide containing metaphosphate glass series (CaO) 40 (Na 2 O) 10 (P 2 O 5 ) 50 with TiO 2 (1, 3, and 5 mol%). TiO 2 incorporation increased the density and glass transition temperature while reduced the degradation rate (5 mol% in particular) by twofold compared with (CaO) 30 system reported previously. This has been confirmed by ion release and the minimal pH changes. TiP 2 O 7 , NaCa(PO 3 ) 3 and CaP 2 O 6 phases were detected for all TiO 2 -containing ceramics. XPS showed that the surface is composed of Ca, P, and Ti. Ti was recognized mainly as TiO 2 , but its total amount was lower than theoretical values. 31 P magic angle spinning (MAS) NMR showed a downfield shift of the 31 P lineshape with increasing TiO 2 , interpreted as an effect of the titanium cation rather than an increase in the phosphate network connectivity. FTIR showed that incorporation of TiO 2 increased the strength of the phosphate chains, and the O/P ratio while introducing more Q 1 units into the structure at the expense of the Q 2 units. There were no differences, however, in surface topography roughness and free energies between these glasses. These results suggested that TiO 2 and CaO were acting synergistically in producing glasses with controllable bulk and structural properties.

show abstract

“…In the Raman spectra of the amorphous materials, four bands were observed at 1007, 627, 578, and 498 cm −1 . The principal broad band at 1007 cm −1 was assigned to the symmetric stretching of PO 3 terminal groups from pyrophosphate [10]. The bands at 627 and 498 cm −1 corresponded to the asymmetric and symmetric deformation modes of PO 4 , and the one at 578 cm −1 was attributed to the deformation mode of PO 3 group.…”

Section: Thermal Behavior Of the Amorphous Cerium Phosphatementioning

confidence: 97%