Scientific highlights

Porous bioactive glass microspheres prepared by flame synthesis process

Figure 1: Morphology of the as prepared porous 45S5 BG micro-sphere particles.

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Four-component relativistic time-dependent density-functional theory using a stable noncollinear DFT ansatz applicable to both closed- and open-shell systems.


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Bioactive silicon nitride by surface thermal treatment

Fig. 1. Microstructures of the prepared Si3N4-based substrates with SiO2 (A), SiO2 and CaO (B), and Ca3(PO4)2 (C) as sintering additives.

Fig. 2. Structures of substrate surfaces after oxy-acetylene flame treatment for 60 s (T = 1475°C ± 25°C; O2:C2H2 ratio 1:1.1).
Fig. 3. Cross-sections of the substrates after flame treatment.
Fig. 3. Growth of the MRC5 cells on Si3N4-based substrates (SNSi, SNSiCa and SNCaP) for a period of one week and analyzed by polarization microscope.

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Micro scale fracture strength of grains and grain boundaries in polycrystalline La-doped ß-Si3N4 ceramics 

Fig 1: Schematic of a microcantilever with the corresponding geometrical parameters, indicating the location of fracture (x1) and loading point (x2) and the real cantilever cut from the sample
Fig. 2 Fracture strength of cantilevers with different La2O3 content
Fig. 3 Fracture strength of cantilevers with different La2O3 content, experimental and calculated data

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Wire electrical discharge machinable SiC with GNPs and GO as the electrically conducting filler 

Fig. 1: Electrical conductivity and thermal diffusivity of SiC-GNP and SiC-GO composites measured in direction parallel and perpendicular to graphene layers.

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A precursor approach for the development of lace-like Fe2O3 nanocrystallites triggered by pressure dependent nucleation and growth of akaganeite over clay based composites for toluene combustion.  


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