Controlling disorder in host lattice by hetero-valence ion doping to manipulate luminescence in spinel solid solution phosphors

2018 ◽  
Vol 61 (12) ◽  
pp. 1624-1629 ◽  
Author(s):  
Qinqin Ma ◽  
Jie Wang ◽  
Wei Zheng ◽  
Qian Wang ◽  
Zhiheng Li ◽  
...  
2014 ◽  
Vol 633 ◽  
pp. 245-248
Author(s):  
Xin Lin ◽  
Yong Li ◽  
Yan Jing Li ◽  
Jun Jie Zhang ◽  
Chang He Gao ◽  
...  

Specimens were prepared using iron-rich magnesia (3~1 mm、≤1 mm) and high purity magnesia (≤0.088 mm) as the main starting materials, adding tabular alumina at different size (3~2、2~1、≤1 mm) and content:3%、6%、9%、12%、15% to discover the influence of tabular alumina on sample performance. Phase composition and microstructure were also analyzed. The results show that specimen with content of 6% of corundum possessed the best comprehensive performance:apparent porosity 17%, bulk density 2.95 g·cm-3, cold crushing strength 74 MPa, refractoriness under load 1700 °C, heat shock resistance of up to 18 times. The formations of magnesium aluminate spinel and hercynite solid solution were enhanced by Fe ion at high temperatures in the iron-rich magnesia-corundum system at the presence of iron oxides, which are able to largely dissolved in periclase.


1994 ◽  
Vol 80 (7) ◽  
pp. 501-506 ◽  
Author(s):  
Mitsutaka HINO ◽  
Ken-ichi HIGUCHI ◽  
Tetsuya NAGASAKA ◽  
Shiro BAN-YA

1989 ◽  
Vol 164 ◽  
Author(s):  
Tan Hui ◽  
Qin Dong ◽  
Tao Mingde ◽  
Lin Chenglu ◽  
Zou Shichang

AbstractAmorphous CoMnNiO film is doposited on oxidized Si substrate by RF sputtering equipment. Structure relaxation occurs in the amorphous CoMnNiO film when it is annealed below 550°C. Annealed in the range from 600°C to 1000°C, the amorphous film is converted into the polycrystal. After annealing in rich oxygen atmosphere, the amorphous film is transformed into spinel solid solution with stable structure and good electrical properties. The electrical conductivity will be reduced due to formation of low valence oxides when annealed without oxygen. As annealing temperature is higher than 1000°C, some spinel solid solutions will be resolved into low valence oxides CoO and NiO, reducing the conductivity of the CoMnNiO film.


2000 ◽  
Vol 40 (11) ◽  
pp. 1059-1066 ◽  
Author(s):  
Katsumori Fujii ◽  
Tetsuya Nagasaka ◽  
Mitsutaka Hino

1987 ◽  
Vol 95 (1102) ◽  
pp. 604-609 ◽  
Author(s):  
Tadahiko SAITO ◽  
Norio MOCHIDA ◽  
Atsushi OHTSUKA

1994 ◽  
Vol 4 (4) ◽  
pp. 515-517 ◽  
Author(s):  
M. H. Mendonça ◽  
M. R. Nunes ◽  
F. M. A. Costa ◽  
A. Carvalho ◽  
M. M. Godinho

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