Texture evolution in tape cast lead metaniobate

Influence of tape cast parameters on texture formation in alumina by templated grain growth

“…3 the lotgering factor and the shear stress as a function of the amount of alumina platelets is shown. As expected, 14,[17][18][19][20][21][22] an increased concentration of platelets results in a higher lotgering factor, 26 indicating that the texture in the sintered article increases (Table 3). Increasing the amount of platelets above 8% does not result anymore in a higher lotgering factor, likely due to an increase in template impingement.…”

“…Another important factor may be that the increase in viscosity makes aligning the templates harder, since a higher viscosity means more resistance to rotation of particles. Nevertheless, this is countered by the increase in shear rate, which should result in a higher lotgering factor, 14 making it likely that the drop in lotgering factor is the result of air in the suspension. …”

“…11 In the doctor blade process the suspension is subject to both the pressure flow governed by the height of the liquid column in the reservoir behind the doctor blade and to the drag flow, created by the relative velocity difference between the carrier film and the doctor blade. [12][13][14][15][16] The shear forces in the tape casting process can be held responsible for the alignment of non-equiaxed particles or shape anisotropic particles in green tape cast products. Until recently only the influence of the template concentration 14,[17][18][19][20][21][22] has been studied extensively on the texture, with one study on the influence of carrier speed 14 and viscosity.…”

“…[12][13][14][15][16] The shear forces in the tape casting process can be held responsible for the alignment of non-equiaxed particles or shape anisotropic particles in green tape cast products. Until recently only the influence of the template concentration 14,[17][18][19][20][21][22] has been studied extensively on the texture, with one study on the influence of carrier speed 14 and viscosity. 14 In this study we have qualitatively studied the effect of different tape cast parameters, using alumina as a model system.…”

“…Until recently only the influence of the template concentration 14,[17][18][19][20][21][22] has been studied extensively on the texture, with one study on the influence of carrier speed 14 and viscosity. 14 In this study we have qualitatively studied the effect of different tape cast parameters, using alumina as a model system. We used a water-based tape cast system for obvious reasons of environmental friendliness and safer use compared to solvent base tape casting.…”