The results show that a polyether polyol with good physical properties is obtained when starting temperature is about 130℃, mass fraction of catalyst DMC is 30 × 10-6 and starting pressure of PO is low.
The results indicated that 6-O-CMCH was chitosan derivative with low degree of substitution(9.5%) and high degree of deacetylation(83.2%). The starting temperature of thermal degradation of 6-O-CMCH was lower than 180℃.
Compared to ZA104 alloy containing larger amounts of alloying element,ZA73 alloy has higher liquidus temperature(～627℃),wider solidification range(～283℃),and lower starting temperature of the second phase transformation(～354℃) due to the decrease of its alloying element contents.
The experimental results indicate that the narrow slot channel tubes have the outstanding characteritstics, such as the low starting temperature (minmum 68 degrees), wide operation temperature range (68～90 degrees) and low vacuum requirement (under 10 kPa).
In order to improve abrasion condition of automobile engine in cold starting at low temperature,an experimental research on abrasion of interior wall of cylinder is carried out. The result indicates that the lower the cold starting temperature is,the more severe the abrasion of interior wall of cylinder is.
A second generator is designed in a new solar pump-free lithium bromide absorption chiller system to improve the solar energy utility efficiency by decreasing the temperature of heat source(minimum starting temperature 68 ℃,wide operation temperature ranging from 80 ℃ to 93 ℃),based on the falling film absorber,the falling film evaporator,the lunate thermosiphon elevation tube and condenser,etc.
Based on present experimental formulae to calculate martensite starting temperature Ms of various steel grades, with analysis on the effect of alloying elements on Ms of steel, the experiential formula Ms (℃) = 550-330C-35Mn-17Ni-12Cr-21Mo-10Cu-5W-10Si-0Ti+10Co+30Al for maraging stainless steel is given in this paper.
But when sintering temperature is higher than 900 ℃, the starting temperature of HA formation will be decreased by 134 ℃, the phase transformation temperature of β -TCP to α -TCP increased by 47 ℃ and the decomposing temperature of HA increased by 38 ℃.
The paper has described the basic principles of dephosphorization during the oxidation period of EAF steelmaking, discussed thermally dynamically the main factors such as melting bath temperature, slag alkalinity, slag oxidation properties,slag quantity etc which influence the oxidation dephosphorization, and analyzed the relations between the alkalinity of melting slag at the steelmaking site and the de phosphorization ratio, and between the starting temperature and decarbonization amount for oxidation and the average rate of dephosphorization.
It is proved that with the increase of proportion of titanium dioxide, the starting temperature of calcium aluminosulphate for the chemical combination drops about 33℃, the quantity of free gypsum decreases about 15%, and the quantity of calcium aluminosulphate increases about 27%. When the temperature goes up, decomposing ratio of gypsum increases about 27%
The results show that starting temperature and concentration have great effects on the cooling characteristic of KHP-W. The temperature at Vmax (TVmax) improves with the increase of temperature and concentration, but the maximum cooling speed(Vmax) and the cooling speed at 300℃ (V300 ) reduce.
The transformation starting temperature of the high carbon austenite was found to be strongly dependent on the austempering temperature, the heating rate, and the chemical composition of the iron.
Results show that there is an optimum starting temperature to pressurize, at which the maximum room temperature shear strength of the joint is obtained.
The starting temperature for the reaction of ZnO with chlorine is determined at about 498 K.
The heat transfer was also found to increase with increasing sample starting temperature, resulting in a series of boiling curves dependent on initial sample temperature.
The Curie temperature, Tc, equilibrium temperature, To 5 (Ms + Af)/2, martensitic transition starting temperature, Ms, and reverse transition finishing temperature, Af , of the β single-phase alloys were sensitive to the Fe and Ga compositions.