Funding for this research was provided by:
Ningxia Natural Science Fund (NZ17096)
Ningxia Science Research Project for Colleges (NGY2016148)
Project from Ningxia Key Laboratory of Powder Materials and Special Ceramics (1603)
Article History
Received: 21 May 2018
Revised: 2 August 2018
Accepted: 25 April 2019
First Online: 19 August 2019