The melting point of high Tsuperconductors was determined as a function of oxygen partial pressure. It decreased with the decrease in oxygen partial pressure. It was concluded that the melting is a kind of reduction reaction, in the form of Solid(I) → Solid(II)+Liquid+O. The enthalpy chan...
High melting point oxides - a challenge for crystal growth The paper reviews two issues that are inherent to the growth, and to thermal analysis, of high melting oxides: (1) Oxides are thermodynamically stable only... D Klimm,R Bertram,Z Galazka,... - 《Crystal Research & Technology》 被...
For simple halides and oxides, melting point ( T f ) is related to structure, bond length ( d ), ionization, and exchange. For many structurally related series, the parameter T f d 2 increases linearly with ( ip路ea ) 1 , where ip is the first ionization potential of the metal and...
melting point, temperature at which a substance changes its state from solid to liquid. Under standard atmospheric pressure different pure crystalline solids will each melt at a different specific temperature; thus melting point is a characteristic of a substance and can be used to identify it. Whe...
The freezing of a liquid at its melting point, a (solid + solid) phase transition at its transition temperature, and the boiling of a liquid or subliming of a solid to a gas at a temperature where the vapor pressure of the liquid or solid is equal to the confining atmospheric pressure,...
Both consumable and non-consumable electric arc furnaces are suitable for preparation of high melting point alloys. The non-consumable furnace is usually utilized to prepare alloys with low volatility components. The upper electrode is a water-cooled copper pole inlaid with tungsten head, which acts...
On the basis of the empirical electron theory ot solids and molecules the valence electron structures of CrO3, δ-CrO2, Cr2O3, α-Al2O3 are directly determined from the crystal structures of the four oxides together with the atomic magnetic monents of. Cr determined from electron detraction...
However, from the viewpoint of thermal and high-power light resistance, advantages exist in employing inorganic glasses. By decreasing the preparation temperature, we have emphasised that several application windows are now open to inorganic glasses. Summarily, we fabricated low-melting phosphate glass ...
1 atm 933.473 K ITS-90 fixed point (freezing point) Americium 1449 ± 5 K Antimony 1 atm 903.778 K ITS-90 first-quality, secondary reference point (freezing point) Argon 7.2 GPa 810 K to 820 K 5.7 GPa 700 K to 750 K ...
melting point melting pot melting profile melting rate melting ratio melting temperature melt-off rate melton Melton Mowbray Melton, James melt-through meltwater Melun Melusina Mélusine Melusinidae Melville Melville Bay Melville Island Melville Jean Herskovits ...