A neodymium doped yttrium aluminum gamet （Nd：YAG） transparent ceramic was fabricated by a solid state reaction method using commercial α-Al2O3, Y2O3, and Nd2O3 powders as starting materials and tetraethyl orthosil...A neodymium doped yttrium aluminum gamet （Nd：YAG） transparent ceramic was fabricated by a solid state reaction method using commercial α-Al2O3, Y2O3, and Nd2O3 powders as starting materials and tetraethyl orthosilicate （TEOS） as sintefing aid. The morphology and microstructure of the nanopowders and the Nd：YAG transparent ceramic were investigated. The fully dense Nd：YAG ceramic with an average grain size of-20 μm was obtained by vacuum sintering at 1720℃ for 12 h. Few pores and grain-boundary phases were observed. The in-line transmittance of the ceramic was 81.5% at 1064 nm.展开更多
The effect of Ti （ C, N） on properties of low-carbon MgO - C bricks was investigated. The phase composition and the microstructure of the matrix of low-carbon MgO - C brick containing Ti （ C, N） were studied by XR...The effect of Ti （ C, N） on properties of low-carbon MgO - C bricks was investigated. The phase composition and the microstructure of the matrix of low-carbon MgO - C brick containing Ti （ C, N） were studied by XRD and SEM analysis together with EDS. The results showed that Ti （ C, N） distributed in the matrix of lowcarbon MgO - C brick uniformly after being treated at 1 600 ~C for 3 h in coke powder bed, and Ti （C, N） and MgO formed a solid solution. After the treatment at 1 600 ℃ for 3 h in coke powder bed, the bulk density and cold crushing strength of low-carbon MgO - C brick with Ti （ C, N） decreased, and the apparent porosity and linear change rate of specimens increased. The oxidation resistance of low-carbon MgO - C brick with Ti（ C, N） was superior to that of low-carbon MgO - C brick with no additives, but inferior to that of low-car- bon MgO - C brick with Al powder. The slag resistance of the specimen with Ti （ C, N） was excellent as well.展开更多
基金supported by the Natural Science fund of Jiangsu Province,China(No.BK2007724)
文摘A neodymium doped yttrium aluminum gamet （Nd：YAG） transparent ceramic was fabricated by a solid state reaction method using commercial α-Al2O3, Y2O3, and Nd2O3 powders as starting materials and tetraethyl orthosilicate （TEOS） as sintefing aid. The morphology and microstructure of the nanopowders and the Nd：YAG transparent ceramic were investigated. The fully dense Nd：YAG ceramic with an average grain size of-20 μm was obtained by vacuum sintering at 1720℃ for 12 h. Few pores and grain-boundary phases were observed. The in-line transmittance of the ceramic was 81.5% at 1064 nm.
文摘The effect of Ti （ C, N） on properties of low-carbon MgO - C bricks was investigated. The phase composition and the microstructure of the matrix of low-carbon MgO - C brick containing Ti （ C, N） were studied by XRD and SEM analysis together with EDS. The results showed that Ti （ C, N） distributed in the matrix of lowcarbon MgO - C brick uniformly after being treated at 1 600 ~C for 3 h in coke powder bed, and Ti （C, N） and MgO formed a solid solution. After the treatment at 1 600 ℃ for 3 h in coke powder bed, the bulk density and cold crushing strength of low-carbon MgO - C brick with Ti （ C, N） decreased, and the apparent porosity and linear change rate of specimens increased. The oxidation resistance of low-carbon MgO - C brick with Ti（ C, N） was superior to that of low-carbon MgO - C brick with no additives, but inferior to that of low-car- bon MgO - C brick with Al powder. The slag resistance of the specimen with Ti （ C, N） was excellent as well.
