Study of the Electromagnetic Properties of Nano (MxZn1−x)Fe2O4 (M=Cu, Ni) as a Function of the Sintering Temperature

In this study, the chemical co-precipitation method was used to prepare a nanoscale ferrite powder with Cu-Zn and Ni-Zn compositions. Ferrite, in different Cu-Zn stoichiometric ratios, showed optimal composition of saturated magnetization for Cu0.7Zn0.3Fe2O4; under an air environment and calcined at 900 °C, the saturated magnetization was 60.19 M(emu/g). The average particle diameter was 10 nm for the non-calcined sample, while when the sintering temperature was 900 °C, the particle diameter was about 150 nm. In addition, in different Ni-Zn stoichiometric ratios, the optimal composition of the saturated magnetization was Ni0.5Zn0.5Fe2O4; under an air environment and calcination at 900 °C, the saturated magnetization was 91.40 M(emu/g). The average particle diameter for the non-calcined sample was about 10 nm, but when the sintering temperature was 1200 °C, the particle diameter was 201.06 nm. The prepared ferrite nano-powder was characterized by scanning electron microscopy(SEM), X-ray diffraction(XRD), and vibrating sample magnetometer(VSM) to reveal its microscopic structure and related electromagnetic properties. Ferrite powders of either Cu-Zn or Ni-Zn composition can be used as catalysts for chemical reactions or iron core materials

How Nonlocal Entrepreneurial Teams Achieve Sustainable Performance: The Interaction between Regional Entrepreneurial Ecosystems and Organizational Legitimacy

Nonlocal entrepreneurship plays an important role in promoting regional economic development. The purpose of this paper is to discuss the influence of the subjective and objective factors (organizational legitimacy and regional entrepreneurial ecosystem) of nonlocal entrepreneurship on its sustainable performance and boundary conditions. Through the analysis of 608 questionnaires of 237 teams at different times, the following conclusions are drawn: First, we find that entrepreneurial ecosystems and organizational legitimacy effectively promote nonlocal entrepreneurial teams’ sustainable performance, and strategic flexibility has positive moderating effects on this relationship. Secondly, through polynomial regression and response surface analysis, we find that the interaction between entrepreneurial ecosystems and organizational legitimacy has a positive impact on sustainable performance. Specifically, compared with the inconsistent status of entrepreneurial ecosystems and organizational legitimacy, the sustainable performance is higher under a consistent status. Compared with the low consistency status of entrepreneurial ecosystems and organizational legitimacy, the sustainable performance in the high consistency status is higher. Therefore, we suggest that the government, universities, and enterprises should build entrepreneurial ecosystems to promote the sustainability of nonlocal entrepreneurial teams. For nonlocal entrepreneurial teams, organizational legitimacy and strategic flexibility should be enhanced. The presented research adds to the literature by integrating subject and object factors (organizational legitimacy and regional entrepreneurial ecosystem), which has important theoretical significance

Supply chain management scholar’s research impact: moderated mediation analysis

Purpose: the purpose of this paper is to draw on social capital theory to develop a model to explain the determinants of a supply chain management scholar’s academic research impact.Design/methodology/approach: drawing from a database of 450 supply chain management scholars in different countries collected from ResearchGate and the World Bank, the bootstrapping method was applied on the moderated mediation analysis.Findings: analysis of the mediating role of a scholar’s social capital suggests that social capital theory has a strong explanatory power on the relationship between a scholar’s research skill and academic impact. To account for the boundary effect at the country-level, the authors further examine if this mechanism differs by country in the supply chain management research context.Research limitations/implications: the findings from this study are from a single research area, which limits the generalizability of the study. Although the data are collected from different sources, including ResearchGate and the World Bank, it is cross-sectional in nature. The variables in this model do not have strong causal relationships.Practical implications: the results suggest that supply chain management scholars can reap the benefits of their social capital. Specifically, scholars can enhance their academic impact by increasing their social capital.Originality/value: the results provide a reference for supply chain management scholars keen on enhancing their academic research impact. It also provides a reference to explain why country-level differences can influence these scholars