The impact of nano-quartz on the structure of glass-ceramic glazes from the SiO2–Al2O3–CaO–MgO–Na2O–K2O system

Influence of gravity on sintering of 3D‐printed powder components

“…The silicarich Na 2 O-K 2 O-Al 2 O 3 -SiO 2 system used in the present work undergoes the formation of the low-viscosity phase thanks to the presence of the alkaline oxides (Na 2 O and K 2 O). [27][28][29][30][31][32][33][34][35][36] The presence of this low-viscosity phase plays an important role in enhancing the diffusion process that occurs during sintering and in the rearrangement of the high-viscosity phase. 13 The constitutive model proposed in this paper considers the presence of high-(Alumina rich) and low-viscosity (Silica rich) phases to study the microstructure homogeneities and the influence of gravity during sintering.…”

“…The present study uses the model described in Contreras et al 24 that takes into account gravity‐induced grain settling during the liquid‐phase sintering. The silica‐rich Na 2 O‐K 2 O‐Al 2 O 3 ‐SiO 2 system used in the present work undergoes the formation of the low‐viscosity phase thanks to the presence of the alkaline oxides (Na 2 O and K 2 O) 27‐36 . The presence of this low‐viscosity phase plays an important role in enhancing the diffusion process that occurs during sintering and in the rearrangement of the high‐viscosity phase 13 .…”

“…29,30 The physics of resin under pressure is similar to the seepage pr lar approaches have been used also to mod into a mold containing fiber mats. 23,[31][32][33][34][35][36][37][38] T in these cases to determine the resin flow ing times corresponding to different infilt Preceramic polycarbosilane polymers as precursors to make ceramic fibers 10,3 trix. [7][8][9]40,41 The chemical and volume ch pany ceramization of the polymer during documented in several studies.…”

“…29,30 The physics of resin flow into a mold under pressure is similar to the seepage problem and so similar approaches have been used also to model the flow of resin into a mold containing fiber mats. 23,[31][32][33][34][35][36][37][38] The models are used in these cases to determine the resin flow front and mold filling times corresponding to different infiltration conditions.…”

Glass-Ceramics from Trachyte Rock- Limestone or Magnesite

“…In the SiO 2 -Al 2 O 3 -RO (R = Ca, Mg, Sr) glass-ceramic glaze, an increase of heating rate leads to a decrease of the sintering crystallization temperature [7]. For SiO 2 -Al 2 O 3 -CaO-MgO-Na 2 O-K 2 O glass system, the addition of nano-grained quartz improves the mechanical of the developed glass-ceramic glaze [8]. Others cleared that the glass-ceramic glaze enjoys better mechanical and chemical properties than the traditional ceramic glaze [9].…”