A method for measuring the refractivity of saturated alcohol gas in high precision in closed vessel had been designed. This experimental apparatus used an interference method to observe the variation of interference fringes when the gas pressure changed, combining with the relationship of the number of the changing interference fringes and the refractivity of saturated alcohol gas, then the refractivity of alcohol gas under a certain pressure could be measured. The results showed that this method was accurate in deduce, simple in measurement and method, and reliable. This method could be promoted to measure the refractivity of gas. Especially, it also could be used to measure the liquid level of the liquid-storage tanks.
Experimental Study on the Rheologicalpro Perties ofHeavy Oil in Liaohe Oil-Field
In order to optimize the transportation pipeline of heavy oil and provide baseline data for the study of energysaving technology, the experimental study on the viscosity-temperature characteristics and rheological properties of heavy oil in Huanxiling was carried out. The viscosity-temperature curve and the rheological characteristic curve were drawn, the viscosity-temperature equations and the rheological equations were fitted, and the viscosity-temperature index was calculated at each temperature interval. Through the viscosity-temperature curve and rheological characteristic curve fitting, the results showed that the correlation coefficient was close to 1 which indicated a higher degree of fitting and the small error. The rheological index was less than 1, which indicated that the heavy oil used in the experiment was pseudo plastic fluid. At the test temperature of 70 ℃,the heavy oil showed Newtonian behavior.
Progress in Research of Preparation and Application of Rare Earth Luminescent Nanomaterials
With the development of science and technology, more and more materials are coming out, at the same time,the demand for materials is increasing. Rare earth luminescent nanomaterials are different from conventional ones. They have the advantages of good physical and chemical stability, high temperature resistance, narrow luminescence band and high color purity which makes they show good prospect of applications in so many fields, such as light emitting devices, imaging and medicine and have become one of the hot spots. In this paper, the preparation and application of rare earth luminescent nanomaterials are reviewed, and the problems that need to be solved and the development prospects are discussed.