Search results1 – 2 of 2
China has become the low‐cost manufacturing center of the world. The purpose of this paper is to provide an in‐depth analysis of a new manufacturing strategy for China's…
China has become the low‐cost manufacturing center of the world. The purpose of this paper is to provide an in‐depth analysis of a new manufacturing strategy for China's future manufacturing sector which is trying to transform into a new low‐carbon development paradigm. It also aims to discuss the empirical implications and policy suggestions.
The paper is based on the broad reviewing of the relative government documents and press reports in China, the USA, and Japan. The authors also conducted case research of China's remanufacturing practices.
The high energy consumption and emissions of China's manufacturing sector results from the widespread use of obsolete production equipment, which can produce low‐cost products with a severely negative environmental effect. The remanufacturing strategy can upgrade existing production equipment to improve production efficiency, which will be a more practical paradigm for China's future manufacturing sector.
The previous relative low‐carbon policies in China are mainly associated with the administrative measures, such as direct “command‐control”, which have paid little attention to the practical development paradigm. This paper first provides a framework for understanding and practical evidence for the remanufacturing strategy as a new low‐carbon paradigm for the giant manufacturing sector of the world's largest developing country.
To evaluate the effect of flux, activator and co‐activator on solid state synthesis of SrAl2O4: Eu2 + , Dy3 + phosphor, where boric oxide, europium oxide and dispersium…
To evaluate the effect of flux, activator and co‐activator on solid state synthesis of SrAl2O4: Eu2 + , Dy3 + phosphor, where boric oxide, europium oxide and dispersium oxide were used, respectively.
To optimise synthesis condition of long lasting phosphorescence SrAl2O4 phosphor, boric oxide was used as a flux. To improve relative intensity of SrAl2O4: Eu2 + phosphor, the critical concentration of Eu2 + was determined. The effect of various concentration of co‐activator on afterglow properties, the effect of Dy3 + ion on the emission and excitation spectra were examined.
The SrAl2O4: Eu2 + , Dy3 + phosphor powders have been synthesised by solid state reaction method. The result of XRD patterns indicated that, addition of 5 mol% B2O3 enhanced the formation of SrAl2O4 at 1,200°C. Investigation on the variation of emission intensity of different phosphors containing different amounts of Eu2 + revealed that after 6 mol% of Eu2 + concentration, quenching process occurred. Dy3 + formed trap levels and results demonstrated that increasing concentration of Dy3 + up to 5 mol% reduced the relative intensity and increased the decay time.
Using B2O3 as a flux and solid state reaction method for preparation of this phosphor is in good agreement with industrial production and make it economic, because of reduced sintering temperature.