temperature expansion
1.With the three-frequencey phonon model,the experimental curves of the temperature dependence of low temperature abnormal thermal linear expansion coefficient a (10￣30K) and direct band gap E. (10￣300k) of CdTe were successfully fitted. The results indicate that the low temperature abnormal thermal expansion coefficient of CdTe is due to TA phonon,and the band gap shift is mainly influenced by the electron-TA phonon Interaction.
2.Synthesis of Crystalline BCN Compounds under High Pressure and High Temperature and Their Thermal Expansion Property
3.The research results show the expansion coefficient of the alloy is (-0.1-0.3)×10-6/℃, and the temperature range of negative expansion is adjustable between 10℃ and 100℃.
4.Lead-free frit was first prepared by the melting method. Then, the effects of CeO2,Li2O and ZrO2 on the performances of the frit, such as the maturing temperature range, the thermal expansion coefficient, the flexural strength and the chemical stability, etc. , were investigated by using the high-temperature microscope, the thermal expansion analyzer, XRD and SEM.
5.The polytropic index can be calculated according to the experiment data of coal temperature, the free gas expansion work and adsorbed gas work can be calculated using polytropic index.
6.When the temperature to gas pipelines, temperature packets of material expansion, the pressure rise, inflation pressures are rising corrugated box, corrugated promote the expansion thrust to overcome the spring-loaded pole resistance, the ball-type valve opened for big change; When the gas pipeline to reduce the temperature, temperature of the material swelling up, the pressure lowered inflation corrugated box pressure also reduced, spring-loaded pole compressed corrugated of resistance to thrust, spherical valves open for smaller; This constant push and pull adjustment for the balance, as long as refrigeration cycle continue.
7.THE MICROCOSMIC EXPLANATION OF TEMPERATURE CHANGE OF IDEAL GAS IN ADIABATIC EXPANSION
9.The effects of the factors including temperature,O_2 concentration,passivation time and expansion rate ect, on catalyst passivation.
10.The results showed that passivation of the presulfided hydrogenation catalysts was necessary; temperature, concentration of O2, reaction time and expansion rate are important influential factors on the passivation effects.
