National Instrument Functional Materials Engineering Technology Research Center

Chongqing, China

National Instrument Functional Materials Engineering Technology Research Center

Chongqing, China
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Ju B.,National Instrument Functional Materials Engineering Technology Research Center | Tang R.,National Instrument Functional Materials Engineering Technology Research Center | Zhang D.,National Instrument Functional Materials Engineering Technology Research Center | Yang B.,National Instrument Functional Materials Engineering Technology Research Center | And 2 more authors.
Journal of Magnetism and Magnetic Materials | Year: 2015

Both anisotropic and isotropic magnetorheological elastomer (MRE) samples were fabricated by using as-prepared polyurethane (PU) matrix and carbonyl iron particles. Temperature-dependent dynamic mechanical properties of MRE were investigated and analyzed. Due to the unique structural features of as-prepared matrix, temperature has a greater impact on the properties of as-prepared MRE, especially isotropic MRE. With increasing of temperature and magnetic field, MR effect of isotropic MRE can reach up to as high as 4176.5% at temperature of 80 °C, and the mechanism of the temperature-dependent in presence of magnetic field was discussed. These results indicated that MRE is a kind of temperature-dependent material, and can be cycled between MRE and MR plastomer (MRP) by varying temperature. © 2014 Elsevier B.V.


Zhang Z.-L.,National Instrument Functional Materials Engineering Technology Research Center | Zhang Z.-L.,Chongqing Instrument Materials Research Institute | Luo S.,National Instrument Functional Materials Engineering Technology Research Center | Luo S.,Chongqing Instrument Materials Research Institute | And 4 more authors.
Gongneng Cailiao/Journal of Functional Materials | Year: 2014

Many methods of measuring liquid level, it was difficult to achieve accurate reliable monitor the liquid level with traditional sensor. In this paper, a new sensor for the measurement of liquid level has been developed, which includes the sensor for the multi-point temperature sensing of liquid level measurement. Design principle of sensor was based on the differences of heat transfer coefficient between liquid phase and gas phase. Experimental data have shown that the system was correct in principle, reliable and feasible in structure, and can bear high temperature and high pressure for monitoring the liquid level in a pressure vessel and other vessels. The sensor can accurately determine the liquid and gas (vapor) the location of the interface. It's suitable for monitoring the level in a nuclear reactor pressure vessel. ©, 2014, Journal of Functional Materials. All right reserved.


Tang L.,Chongqing Instrument Materials Research Institute | Tang L.,National Instrument Functional Materials Engineering Technology Research Center | Lu L.,Chongqing Instrument Materials Research Institute | Lu L.,National Instrument Functional Materials Engineering Technology Research Center | And 14 more authors.
Chongqing Daxue Xuebao/Journal of Chongqing University | Year: 2014

The effect of nitriding on the carbonyl iron powder is characterized by XRD, SEM and vibrating sample magnetometer. With the nitride iron powder, a MR fluid with the excellent performance has been prepared through adding in thixotropic agent of organobentonite and polymeric surfactant. The magnetic properties, rheological properties, antisedimentation and aggregation stability, temperature stability, tribology properties and damping properties of MR fluid has been studied. The properties are listed as follows: shear stresses is more than 60 kPa (B=0.5 T), off state viscosity is less then 1.0 Pa·s, and the three months settling rate is less than 10% and no hardening, easy redispersion. Temperature ranges from 20 to 125°C, and the maximum decay rate of the damping force is less then 14.3%.

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