Open AccessThe rheological performance of aqueous ceramic ink described based on the modified Windhab model
Author(s) -
Yongqing Wang,
Wenjing Yang,
Qikun Wang,
Kun Liu,
Chao Wang,
Qibing Chang
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/aba507
Subject(s) - guar gum , inkwell , rheology , shear thinning , materials science , ceramic , aqueous solution , viscosity , composite material , apparent viscosity , chemical engineering , chemistry , organic chemistry , engineering , biochemistry
The good stability is the pre-requirement for ceramic ink in ink-jetted printing technology. The aqueous ceramic ink owning a significant shear-thinning effect is proposed using guar gum as additive agent. Due to the shear-thinning effect, the ink in static state has a high viscosity, which contributes to keep the ink stable. At the same time, the ink in spray state has a very low viscosity to meet the requirement of spraying. To describe this rheological performance, the Windhab model is modified, in which the correction term η α is added into η ∞ . The term η α is related to the concentration of guar gum and the solid content of the aqueous ceramic ink. A slip model is proposed to understand the interaction between pigment particles and guar molecules.