1998
DOI: 10.1016/s0955-2219(98)00061-2
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Effect of fluoride on sinterability of a silicate glass powder

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Cited by 16 publications
(8 citation statements)
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“…parent viscosity. Therefore, as previously reported in other studies, 10,14,15,20,32 sintering is improved by faster heating rates.…”
Section: Resultssupporting
confidence: 83%
See 1 more Smart Citation
“…parent viscosity. Therefore, as previously reported in other studies, 10,14,15,20,32 sintering is improved by faster heating rates.…”
Section: Resultssupporting
confidence: 83%
“…[10][11][12][13][14][15] The apparent viscosity may increase significantly by liquid-liquid separation, nucleation or/and crystal growth phenomena, 5,16 reaching values 10 4 -10 6 times higher than the shear viscosity of the parent melts. An example is the glass-ceramics production cycle, where the rise of the heating rate between the nucleation and crystallization steps depends on the increasing of the apparent viscosity: at low heating rate, due to the formation of a crystal phase, the apparent viscosity increases thus avoiding the deformation of the products; at a high heating rate the glass-ceramic may be deformed under its own weight.…”
Section: Introductionmentioning
confidence: 99%
“…13 When the rate of phase formation is low, the sintering kinetics may be explained by the theories of viscous flow sintering, [14][15][16][17] while, when densification and crystallization take place simultaneously, the increasing of apparent viscosity may reduce the sintering rate and may inhibit the densification. [18][19][20][21][22][23][24][25] Various models are proposed to explain the relationship between the apparent viscosity of a suspension and the corresponding volume of rigid phase. [26][27][28] Nevertheless of the differences in the theoretical approaches, all relations predict a relatively small variation up to one "critical" percentage of rigid phase, followed by rapid increasing of η a by 10 3-6 dPa s. In the case of sinter-crystallization this means that full densification can be obtained only if the sintering process completes before the formation of the "critical" percentage of crystalline phase; otherwise it will be inhibited by high apparent viscosity.…”
Section: Introductionmentioning
confidence: 99%
“…In the sintered glass-ceramics belonging to the cordierite, anorthite, apatite and wollastonite systems, the densification is accomplished before the beginning of the respective phase formation [2][3][4][5]. No residual porosity is attained in the final materials and they are characterized by excellent mechanical and chemical properties.…”
Section: Introductionmentioning
confidence: 99%