Bohai Products

High-Performance MR Fluids

 

MRF A181

$480.00 / Liter

Bohai A181 fluid is a suspension of micron-sized, magnetizable particles in a carrier fluid. When exposed to a magnetic field, the rheology of A181 fluid reversibly and instantaneously changes from a free- flowing liquid to a semi-solid with controllable yield strength.

Bohai A181 fluid can be used in valve mode (fluid flowing through an orifice) or in shear mode (fluid shearing between two surfaces). In the absence of a magnetic field, A181 fluid flows freely or allows free movement. Upon application of a magnetic field, the fluids particles align with the direction of the field in chain-like fashion, thereby restricting the fluid’s movement within the gap in proportion to the magnetic field.

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Description:

Bohai A181 is a hydrocarbon-based magnetorheological fluid, which can be used in active or semi-active control dampers, brakes, clutches, hydraulic valves and other products, especially suitable for intelligent control, vibration reduction and other fields.

Bohai A181 fluid is a suspension of micron-sized, magnetizable particles in a carrier fluid. When exposed to a magnetic field, the rheology of A181 fluid reversibly and instantaneously changes from a free- flowing liquid to a semi-solid with controllable yield strength.

Bohai A181 fluid can be used in valve mode (fluid flowing through an orifice) or in shear mode (fluid shearing between two surfaces). In the absence of a magnetic field, A181 fluid flows freely or allows free movement. Upon application of a magnetic field, the fluids particles align with the direction of the field in chain-like fashion, thereby restricting the fluid’s movement within the gap in proportion to the magnetic field.

Features and Advantages:
  • Quick Response Time: it can respond immediately and reversibly by changing the magnetic field.
  • Dynamic Yield Strength: high yield strength in a magnetic field, low yield strength without a magnetic field, and wide controllability.
  • Temperature Resistance: stable operation in a wide temperature range, meeting the requirements of demanding applications such as automotive shock absorbers.
  • Hard Settling Resistant: high resistance to hard settling, easy to redisperse.
  • Non-Abrasive: This product does not cause abrasion to the device.
Instructions for Use:

Mixing: Under flow conditions, there is no separation between the particles and the carrier liquid. However, settlement will still occur under static conditions. If needed, use a paint shaker to redisperse the particles into a homogeneous state prior to use.
Storage: Be sure to keep the container tightly closed when not in use.

Properties:

Density: 2.96 ~ 3.10 g/cm3
Operating Temperature: -40 ~ 140 °C
Viscosity: 0.110±0.02 Pa-s (600-1200 sec-1, 40°C)

 

Product Grade Main Ingredients and Weight Percentage Magnetic Particles
MR Fluid A181 Magnetic Particles Carrier Fluid Additive Wt % Vol %
≥81% ≥16% ≤4% 81% 32%
Fe、C、O、N C、H C、H、O、S

 

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