Commercial high purity corundum brick,corundum-mullite brick,mullite brick,calcium hexaaluminate brick and calcium hexaaluminate-corundum brick were studied to investigate their reaction state and alkali vapor corrosi...Commercial high purity corundum brick,corundum-mullite brick,mullite brick,calcium hexaaluminate brick and calcium hexaaluminate-corundum brick were studied to investigate their reaction state and alkali vapor corrosion mechanism at 1370 and 1500℃.The results show that:(1)served in hot alkali vapor,the high-purity corundum brick has no obvious slag layer but expands dramatically;(2)the corundum-mullite brick shows obvious reactive expansion at 1370℃and melting corrosion happens at 1500℃;(3)at 1370℃alkali vapor and mullite brick react and form a slag layer without volume effect;when the temperature increases to 1500℃,the reaction melting corrosion intensifies;(4)the calcium hexaaluminate brick and the calcium hexaaluminate-corundum brick form a thin slag layer in alkali vapor,and the sample surface absorbs Na+to form a dense layer with small volume effect.展开更多
Chip-sized alkali atom vapor cells with high hermeticity are successfully fabricated through deep silicon etching and two anodic bonding processes.A self-built absorption spectrum testing system is used to test the ab...Chip-sized alkali atom vapor cells with high hermeticity are successfully fabricated through deep silicon etching and two anodic bonding processes.A self-built absorption spectrum testing system is used to test the absorption spectra of the ru-bidium atoms in alkali atom vapor cells.The influence of silicon cavity size,filling amount of rubidium atoms and temperature on the absorption spectra of rubidium atom vapor in the atom vapor cells are studied in depth through a theoretical analysis.This study provides a reference for the design and preparation of high quality chip-sized atom vapor cells.展开更多
文摘Commercial high purity corundum brick,corundum-mullite brick,mullite brick,calcium hexaaluminate brick and calcium hexaaluminate-corundum brick were studied to investigate their reaction state and alkali vapor corrosion mechanism at 1370 and 1500℃.The results show that:(1)served in hot alkali vapor,the high-purity corundum brick has no obvious slag layer but expands dramatically;(2)the corundum-mullite brick shows obvious reactive expansion at 1370℃and melting corrosion happens at 1500℃;(3)at 1370℃alkali vapor and mullite brick react and form a slag layer without volume effect;when the temperature increases to 1500℃,the reaction melting corrosion intensifies;(4)the calcium hexaaluminate brick and the calcium hexaaluminate-corundum brick form a thin slag layer in alkali vapor,and the sample surface absorbs Na+to form a dense layer with small volume effect.
文摘Chip-sized alkali atom vapor cells with high hermeticity are successfully fabricated through deep silicon etching and two anodic bonding processes.A self-built absorption spectrum testing system is used to test the absorption spectra of the ru-bidium atoms in alkali atom vapor cells.The influence of silicon cavity size,filling amount of rubidium atoms and temperature on the absorption spectra of rubidium atom vapor in the atom vapor cells are studied in depth through a theoretical analysis.This study provides a reference for the design and preparation of high quality chip-sized atom vapor cells.
