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Location:Home>Research>Research Divisions>Structural Ceramics Engineering Research Center>Space Materials Science and Experimental Technique>Research Fields

Research fields

1. Space materials and experimental technologies

The group has successfully developed multi sample stations space crystal growth furnace, comprehensive space materials experiment facility, multi-function materials synthesis furnace, et al. These experimental facilities have ever been applied to prepare many materials in space such as alloys, semiconductor, advanced single crystals. Furthermore, high quality BSO crystals were successfully grown in space by SICCAS.

Three generations of space materials experiment facilities developed by ourselvies

Latest comprehensive space materials experiment facility

BSO crystals grown in space and on the ground

Dislocation density in space crystal is lower than that in ground-based crystal by one order of magnitude. (a, b: space crystal, c, d: ground-based crystal)

Higher structural completeness in space crystal indicated by X ray swing curves

2. Mechanism of crystal grow

(1) Space high temperature crystal growing real time observation facility has been designed, with the work temperature up to 1100 oC. The facility has been employed to work in Chinese satellite and spaceship twice. The performance of the facility in space was successful and obtained many innovative achievements.

Space high temperature crystal growing real time observation facility for SZ-2 spaceship

The contrast of morphology during melting between space and ground-based materials with the same composition.

Space oxide peritectic crystal grow and peritectic crystal convection model

(2) Together with AFM in situ observation, the obvious anisotropy of step morphology and step height during high temperature oxide crystal grow were found by optical real time observation.

AFM images of different growing directions for oxide crystal

Surface step height of different growing directions for oxide crystal

3. Novel functional materials developed by containerless processing

Novel rare earth doped optical oxide glasses which can’t be obtained by conventional methods have been successful prepared by containerless processing such as aerodynamic levitation. The glasses show not only strong upconversion luminescence, but also high refractive index (over 2.3), good mechanical properties and high thermal stability.

The contrast between containerless processing and container technology

The structure of aerodynamic levitation system

The equipment of aerodynamic levitation laser heating system

Raw materials (a), beginning melt (b), sphere but stick to wall (c), levitation (d), bulbs appearance (e), clear bulbs (f,g), homogenization (h), transformation (i), quenching (j), recalescence (k), glass (l)

Containerless melting and solidification of oxide materials in the aerodynamic nozzle

Upconversion luminescence spectra, glass and blue light photo of rare earth doped oxide glasses

 
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