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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

In space, convective effect, settlement effect, container wall effect, hydrostatic pressure effect introduced by gravity can be greatly reduced as a result of the decrease of the role of gravity. In this case, materials with more homogeneous composition, fewer structural defects, better performance, larger size can be prepared.

The characters of space materials science

Our 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.

Multi sample stations space crystal growth furnace

(SZ1 to 3 spacecraft payload, 1999-2001)

 

Multi-function materials synthesis furnace

(SJ10 recoverable satellite payload, 2016) 

Comprehensive space materials experiment facility

(TG2 space lab payload, 2016)

BSO

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.

 

最终使用 图片4

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 metastable functional materials developed by ground-based experiment technique originated from space

Space performs special experimental conditions such as containerless effect, microgravity. New rare earth ions doped oxide glasses which can’t be fabricated by conventional methods have been successfully prepared by aerodynamic levitation technique which copy the containerless effect in space. This glass can emit upconversion luminescence which can be observed easily by naked eyes. Moreover, this glass shows high refractive index (over 2.3), excellent mechanical properties and thermal stability. This glass has promising applications in new solid laser, optical temperature sensor, et al.

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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