为提升铌酸钾钠基无铅陶瓷的透光率,使用传统固相法制备了0.95(K 1/2 Na 1/2)NbO_(3)-0.05Ba(Zn 1/3 Nb 2/3)O_(3)-x mol%LiBiO_(2)(简称0.95KNN-0.05BZN-x%LB)透明陶瓷,对其透光率进行表征。结果发现:当x=1时,陶瓷的透光率最高(65%,780...为提升铌酸钾钠基无铅陶瓷的透光率,使用传统固相法制备了0.95(K 1/2 Na 1/2)NbO_(3)-0.05Ba(Zn 1/3 Nb 2/3)O_(3)-x mol%LiBiO_(2)(简称0.95KNN-0.05BZN-x%LB)透明陶瓷,对其透光率进行表征。结果发现:当x=1时,陶瓷的透光率最高(65%,780 nm);而当掺杂量继续增加时,陶瓷内部气孔开始增多,透光率逐渐下降。结果表明,适量LiBiO_(2)的引入不仅降低陶瓷的气孔率,而且增大晶粒尺寸,减少由气孔和晶界产生的光散射,有效提升陶瓷的透光率。展开更多
The microstructures of shale samples before and after hydration were characterized by field emission scanning electron microscopy(FESEM), and the differences in microstructure and physical parameters of original shale...The microstructures of shale samples before and after hydration were characterized by field emission scanning electron microscopy(FESEM), and the differences in microstructure and physical parameters of original shale samples, water saturated samples and samples with water centrifugated were examined by micro CT, porosity and permeability tests. The FESEM test shows that the hydration has no effect on the main morphology, position and pores of organic matter(OM). Hydration can increase the number and width of fractures in shale, including generation of new fractures and extension of existent fractures between inorganic minerals and width increase of fractures between banded organic matter and inorganic minerals. Micro CT results of samples with different water saturations show that the intensity of hydration is dominated by primary fracture development, in other words, the more developed the primary fractures of the shale, the stronger the hydration will be. The width of fractures increased two to five times by intense hydration. The porosity of shale is mainly controlled by organic matter content and secondly influenced by the fracture development. The permeability of shale is mainly affected by fracture development and secondly by the porosity. The fracture development influenced both porosity and permeability, but more strongly on permeability than porosity.展开更多
文摘为提升铌酸钾钠基无铅陶瓷的透光率,使用传统固相法制备了0.95(K 1/2 Na 1/2)NbO_(3)-0.05Ba(Zn 1/3 Nb 2/3)O_(3)-x mol%LiBiO_(2)(简称0.95KNN-0.05BZN-x%LB)透明陶瓷,对其透光率进行表征。结果发现:当x=1时,陶瓷的透光率最高(65%,780 nm);而当掺杂量继续增加时,陶瓷内部气孔开始增多,透光率逐渐下降。结果表明,适量LiBiO_(2)的引入不仅降低陶瓷的气孔率,而且增大晶粒尺寸,减少由气孔和晶界产生的光散射,有效提升陶瓷的透光率。
基金Supported by the National Natural Science Foundation of China(51376104)China National 13th Five-Year Plan Science and Technology Major Project(2017ZX05035002)
文摘The microstructures of shale samples before and after hydration were characterized by field emission scanning electron microscopy(FESEM), and the differences in microstructure and physical parameters of original shale samples, water saturated samples and samples with water centrifugated were examined by micro CT, porosity and permeability tests. The FESEM test shows that the hydration has no effect on the main morphology, position and pores of organic matter(OM). Hydration can increase the number and width of fractures in shale, including generation of new fractures and extension of existent fractures between inorganic minerals and width increase of fractures between banded organic matter and inorganic minerals. Micro CT results of samples with different water saturations show that the intensity of hydration is dominated by primary fracture development, in other words, the more developed the primary fractures of the shale, the stronger the hydration will be. The width of fractures increased two to five times by intense hydration. The porosity of shale is mainly controlled by organic matter content and secondly influenced by the fracture development. The permeability of shale is mainly affected by fracture development and secondly by the porosity. The fracture development influenced both porosity and permeability, but more strongly on permeability than porosity.
