Fabrication of highly-transparent Er:CaF2 ceramics by hot-pressing technique

Comparison of Creep Behavior in Alumina Based Ceramics Densified by Spark Plasma Sintering and Hot Pressing

Spark plasma sintering (SPS) method, as plasma activated sintering, is a method applicable for rapid sintering of metals and ceramics. Owing to the advantage of rapid heating, the alumina ceramics obtained by SPS have a grain size and density comparable to those of hot pressed ones. The increase of densification rate may be related to some difference in ion transport characteristics. This study...

Hot pressing of nanocrystalline TiO2 (anatase) ceramics with controlled microstructure

Nanoparticles and Fabrication of Transparent Polycrystalline Yttria Ceramics

In this thesis, we report on a process to obtain yttrium oxide nanosized particles doped with ytterbium and a sintering method that leads to transparent polycrystalline ceramics. First, nano-powder of yttria was fabricated from a precursor with transient morphology, i.d. yttrium hydroxynitrate platelets that decompose into spherical yttria nano-particles during calcination. The influence of dif...

comparison of creep behavior in alumina based ceramics densified by spark plasma sintering and hot pressing

spark plasma sintering (sps) method, as plasma activated sintering, is a method applicable for rapid sintering of metals and ceramics. owing to the advantage of rapid heating, the alumina ceramics obtained by sps have a grain size and density comparable to those of hot pressed ones. the increase of densification rate may be related to some difference in ion transport characteristics. this study...

Fabrication of Polymer Splitter by Micro Hot Embossing Technique

This research focuses on the manufacturing of 1 by 4 multimode polymer splitter. MEMS fabricating process was first adopted for the fabrication of four inches silicon mold insert and then the micro hot embossing technique was applied to the optical class PMMA material for splitters. The BeamPROPTM simulation software was utilized for the design of optimal silicon mold insert. In the analysis of...