Viscometer selection and test method for electronic paste

The electronic paste is a basic material for manufacturing a thick film element, and is a paste obtained by rolling a solid powder and an organic solvent through three rolls to form a uniform paste (which can be associated with a toothpaste, a paint, etc.).

Electronic paste can be divided into conductive paste, resistive paste, thick film paste, dielectric paste and solder paste, etc. It is a chip resistor, capacitor, potentiometer, inductor; resistor network, a variety of ceramic capacitors, é’½Capacitors, carbon film potentiometers, glass glaze potentiometers, high-focus potentiometers, thick film circuits, hybrid integrated circuits, various sensitive components, automotive anti-fog hotlines and other essential functional materials.

It is prepared by uniformly dispersing in a solvent by stirring. Viscosity is one of the important factors affecting the electronic paste. It not only affects the flow properties of the slurry, but also the consistency and height of the viscosity will affect the uniformity and coating efficiency of the subsequent coating. Too high or too low viscosity is not conducive to pole piece coating. The slurry with too high viscosity has poor leveling property, which is not suitable for coating. Although the viscosity of the slurry is too low, the drying is difficult and the coating is reduced. The drying efficiency also causes coating cracking and slurry particle agglomeration problems.
Therefore, electronic pastes need to have a stable and appropriate viscosity, which is an important indicator of consistency in the production process. As the mixing ends, the stirring stops, and the slurry will precipitate, flocculate and the like, resulting in large particles, which will have a greater impact on the subsequent coating and other processes. The main parameters characterizing the stability of the slurry are fluidity, viscosity, solids content, density, and the like. Different slurry systems have different viscosity changes.
The electronic slurry consists of a variety of raw materials with different specific gravities and different particle sizes, and is a solid-liquid phase mixed dispersion, which is a typical non-Newtonian fluid. The viscosity of non-Newtonian fluids is related to shear rate, time, and shear thinning or shear thickening, in addition to temperature.

Instrument recommendation:

Boleri RVDV2T EZ-lock+ssa+ water bath internationally used Brookfield Boller Fly DV2T Viscometer measures the viscosity of the fluid under steady flow, and can directly read the viscosity data. The viscosity value is closely related to the test conditions (temperature, rotor, speed) and must be given together to make sense.

Brookfield viscometers are commonly used in the manufacturing industry to detect and control product viscosity. With an accuracy of ±1% of the measurement range and a reproducibility of ±0.2%, the Brookfield viscometer provides precise control of viscosity and is an indispensable tool for production and product development.

The Brookfield Viscometer is the world's first viscometer, inventing the first rotary viscometer, the first to create a world standard for viscosity measurement. With 80 years of production experience, Brookfield's name is synonymous with precision in the field of viscosity measurement and control. Brookfield has become the industry benchmark for viscometers with a market share of over 70%. The quality is stable and reliable, with high precision and good repeatability. After being measured by a precision viscometer, it can be precisely controlled to the proper viscosity range for performance.