Dispersion of BaTiO3 powders (Part I)

Preparation of concentrated barium titanate suspensions incorporating nano-sized powders

“…electronic device has motivated many studies of colloidal stability of BT both in aqueous [8][9][10][11][12][13][14][15][16] and non-aqueous media. [17][18][19] Due to minimal environmental impact, aqueous processing is an attractive option for future development, though manufacturers still prefer non-aqueous processing. Recently, nano-sized powders have attracted much attention in order to gain significant improvement in key properties.…”

Citrate- and glycerol triesters as novel dual-functional dispersants and plasticisers for ceramic processing

“…In the present case the stabilisation is rather obtained through an interaction between the dispersants and the ceramic surface through polar interactions or hydrogen bonding. This interaction induces an enhanced electrostatic charging offering a good electrostatic stabilisation (31,32,33).…”

“…A number of diesters namely, diethyl succinate, diethyl fumarate, diethyl maleate, diethyl malate and diethyl tartrate, were additionally investigated in order to further assess the functional groups required for obtaining a proper dispersing effect. This was done both in order to be able to predict optimal molecules for further testing but also to complement the limited literature on the polar screen theory which describes the ability of some small polar molecules to induce good stabilisation through an electrostatic mechanism (31,32,33). A previous study, in a similar system, has additionally shown a strong correlation between the number and type of groups being present and the resulting dispersing properties (34).…”

Better ceramics through colloid chemistry

“…This was a well-known problem in tape casting technology, in which suspensions with different types of additives (solvents, deflocculants, binders, plasticizers, surface modifiers, defoamers, etc) are used (126)(127)(128)(129). Several works demonstrated that when deflocculant was added first the viscosity was lower than when there was simultaneous addition of deflocculants and binders (130)(131)(132).…”