Based on more inferior Eu solid solution into BaTiO

3

at ambient pressure and the reduction of high pressure

under extreme conditions with high pressure of 4.0 GPa and temperature of 1090℃

the solid state reaction was adopted in order to explore new-type functional Eu-doped BaTiO

3

ceramic materials

and its synthesizing law

structural and electrical structural characteristics.XRD(X-ray diffraction pattern)results showed that homogenous solid solutions of Ba

1-x

Eu

x

TiO

3

with gray black body color were prepared from x=0.1 up to 0.4

A-site Ba

2+

ions were homogenously instituted by Eu ions.The x=0.1 sample was indexed as tetragonal;x=0.2 as diphase of tetragonal and cubic;x=0.3 and 0.4 samples were cubic.The crystal structure transforms to higher structural symmetry with increasing Eu content.As x was increased to 0.5

the ABO

3

-type perovskite phase and pyrochlore-type Eu

2

Ti

2

O

7

phase coexisted in the sample.It was determined from XRD data that all Ba

1-x

Eu

x

TiO

3

samples crystallized with size of few tens of nanometer.XPS(X-ray photoelectron spectra)analysis indicated that due to the reduction of high pressure and requirement of charge equilibrium

part Eu ions were reduced as metastable Eu

2+

ions(4f

7

)

Eu

3+

ions and Eu

2+

ions co-existed in all samples

and their contents were approximately equal.Meanwhile

a large of adsorbated oxygen O

-

was detected on the surface of the samples.In nano-sized Ba

1-x

Eu

x

TiO

3

ceramics

charge equilibrium is compensated by metastable Eu

2+

ions and adsorbed oxygen O

-

.This work will provide valuable information and open up a new field for further developing Eu-doping luminescence materials.