Dispersible barium titanate-based particles and methods of forming the same
First Claim
1. A method of processing barium titanate-based particles comprising:
- providing a mixture comprising barium titanate-based particles, a coupling agent, and a first fluid;
removing the fluid to form a barium titanate-based particle composition, wherein the coupling agent is attached to surfaces of at least a portion of the barium titanate-based particles; and
dispersing the barium titanate-based particle composition in a second fluid to form a dispersion.
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Abstract
Dispersible barium titanate-based particles and methods of forming the same are provided. One method involves subjecting the barium titanate-based particles to a heating step which removes hydroxyl groups from particle surfaces. Another method involves attaching a coupling agent to surfaces of the barium titanate-based particles. Both methods reduce the tendency of particles to agglomerate and/or aggregate when subsequently dispersed in a fluid. Thus, the methods enable production of dispersions that have a relatively uniform distribution of particles throughout. Such dispersions may be further processed as desired to form, for example, dielectric layers, polymer/dielectric composites or other structures. The structure may also include a uniform distribution of barium titanate-based particles which can improve properties amongst other advantages.
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Citations
34 Claims
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1. A method of processing barium titanate-based particles comprising:
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providing a mixture comprising barium titanate-based particles, a coupling agent, and a first fluid;
removing the fluid to form a barium titanate-based particle composition, wherein the coupling agent is attached to surfaces of at least a portion of the barium titanate-based particles; and
dispersing the barium titanate-based particle composition in a second fluid to form a dispersion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of processing barium titanate-based particles comprising removing hydroxyl groups from surfaces of the barium titanate-based particles by heating the barium titanate-based particles to a maximum temperature of greater than about 300°
- C. and less than about 500°
C. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
- C. and less than about 500°
- 29. A particulate composition including a plurality of dried barium titanate-based particles, wherein a coupling agent is attached to surfaces of at least a portion of the barium titanate-based particles.
Specification