Formation of Mn‐Co‐Ni‐O Nanoceramic Microspheres Using In Situ Ink‐Jet Printing: Sintering Process Effect on the Microstructure and Electrical Properties. Issue 36 (13th June 2016)

• Record Type: Journal Article
• Authors: Chen, Long; Zhang, Qinan; Yao, Jincheng; Wang, Junhua; Kong, Wenwen; Jiang, Chunping; Chang, Aimin
• Is Part Of: Small. Volume 12:Issue 36(2016)
• Page Start: 5027
• Page End: 5033
• Publication Date: 2016-06-13
• Subjects: ink‐jet printing -- Mn‐Co‐Ni‐O ceramics -- reverse microemulsion method -- two‐step sintering, microspheres; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201600470
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract : Mn‐Co‐Ni‐O nanoceramic microspheres with high density, uniformity, and size tunability are successfully fabricated using in situ ink‐jet printing and two step sintering (TSS) techniques. The microspheres, synthesized by an effective and facile reverse microemulsion method, consist of uncalcined Mn‐Co‐Ni‐O nanocrystallines that show a well formed single tetragonal spinel phase and an average particle size distribution of ≈20 nm. The sintering behavior, microstructure, and electrical properties of the Mn‐Co‐Ni‐O nanoceramic microspheres are systematically investigated and characterized. The results indicate that the sintered Mn‐Co‐Ni‐O nanoceramic microspheres show high density and improved electrical properties. The highest R 25, B 25/50, E a, and α 25 values achieved at sintering temperature of 1150 °C are 4846.7 KΩ, 4320 K, 0.401 eV, and −5.24% K −1, respectively for these Mn‐Co‐Ni‐O nanoceramic microspheres. Furthermore, the formation mechanism of uncalcined Mn‐Co‐Ni‐O nanocrystallines and an analysis of the TSS procedure of the nanoceramic microspheres are discussed. Abstract : Novel Mn‐Co‐Ni‐O microspheres‐based ceramic inks of nanoparticles without calcination using in situ ink‐jet printing are developed, which exhibit the high dense microstructure and well electrical properties via two step sintering process. The obtained results are useful for tailoring small microspheres thermal devices for temperature measurement in harsh environment such as aerospace and deep‐sea fields.