Advanced Materials Research Vol. 624

Abstract: This paper verified the relationship between the cell density of three types of substrates with different cell densities (400cpsi, 600cpsi, 900cpsi) and light-off factor (LOF). The results tested on engine bench demonstrated that, higher cell density of substrate could improve the light-off performance characteristics of catalysts. The effect of increasing cell density of substrate on air-fuel ratio characteristic of catalyst. It was effective measurement that higher cell density enlarged the operating window of catalyst.

Abstract: A low-emissive pigment of Al/SiO2/Fe2O3/FeO/Fe4[Fe(CN)6]3/Cr2O3/Cr (MAS) was prepared by chemical deposition method. The camouflage characteristics of the coated fabric with paint mixed with MAS, binder and other auxiliary in the thermal infrared (IR 8~14 um) and the optical (0.38~1.2 um) region, was studied by emissivity tester, visible light camera and thermal infrared imager. The results show that the MAS pigment has low emissivity and optical camouflage effectiveness compared with the Al/SiO2 pigment. Particularly, the MAS pigment is in green by depositing metal oxide, ferrocyanide and pure metal on the surface of Al/SiO2. The optical reflectance spectrum of coated fabric was similar to the natural grass. Furthermore, the surface emissivity of the coated fabric reached 0.51 in the IR region. The thermography of the coated fabric with 4 wt% MAS was similar to the natural grass. It can conclude that the coated fabric can perfectly imitate grass background.

Abstract: The corrosion inhibition effect of sodium nitrite (NaNO2) and triethanolamine (N(C2H4OH)3) for uranium was evaluated in 200 mg/L sodium chloride (NaCl) solution by linear polarization and potentiodynamic polarization. The results showed that NaNO2 predominatly acted to inhibit the anodic reaction for the electrochemical behavior of uranium. NaNO2 combined with N(C2H4OH)3 could reinforce corrosion resistance of uranium. Multi-function could be found from 20 g/L NaNO2 combined with 10 mL/L N(C2H4OH)3. Pitting corrosion on uranium surface could be effectively prevented by 1g/L NaNO2 combined with 10 mL/L N(C2H4OH)3. Auger electron spectroscopy (AES) and Raman spectrum analyses indicated that uranium oxide layer mainly contained uranium dioxide (UO2).

Abstract: The preparation of fibrous basic magnesium chloride single crystal was investigated. And the fibrous basic magnesium chloride single crystal samples were prepared by liquid reaction method at the atmospheric pressure. Based on the test results of SEM, TEM diffraction and XRD, the effects of the mole rate of calcium hydroxide to magnesium chloride, reaction temperature, mixing time and ripening time on the preparation of the fibrous basic magnesium chloride single crystal are discussed. And based on the output and the length of the fibrous, the best technological conditions for preparing the fibrous basic magnesium chloride are as follows: (1) the mole rate of calcium hydroxide to magnesium chloride is between 0.35 and 0.4; (2) the reaction temperature is 45 centigrade temperature degree; (3) the mixing time is between 2 hours and 5 hours; (4) the ripening time is between 24 hours and 36 hours. The fibrous basic magnesium chloride single crystal, whose length is about between 30µm and 100µm and whose diameter is about between 0.2µm and 1µm, is obtained.