Nature
Coxide is green brown to yellow-brown solid, in the melting point in helium 2280 ± 30 ° C, the vapor pressure is very low; usually from oxalic acid and nitrate Burning. The dioxide density of the high temperature burning method is 11.46 g / cm3, which is a fluorite structure. Often it is green, and the particle size is related. Dioxide, especially after sintering at high temperatures, is very difficult to dissolve, dissolved in hydrochloric acid and nitric acid, is slow and not complete, dissolved in boiling hydrobromic acid, with sodium hydrogen sulfate, etc., can be used under melt conditions. Dissolved dioxide. . The dioxide has a high melting point, high irradiation stability, compatible with metal and reactor coolant, easy to manufacture. It is used as a dynamic reactor nuclear fuel, and is often mixed with uranium dioxide to be mixed with mixed oxide fuel.
Coxide is green brown to yellow-brown solid, the melting point in helium is 2280 ± 30 ° C, the vapor pressure is very low;
Preparation
In the air burned or its compound (except for phosphate), and the oxide is generated in a vacuum or inert atmosphere to 1000 ° C. Holley et al. Oxide, or PU peroxide, or PU peroxide. The starting compound is important to precipitate in the form of crystallization, since the colloid precipitate is easily formed in black, incomplete oxides when burning.
The oxalate salt of the PU or PU is heated in the air to 1000 ° C can be made pure, crystallized dioxide. In order to avoid dramatically decomposition, the heating speed before about 700 ° C must be very slow, and the temperature can be raised to 1000 ° C to remove the last trace amount of carbon. Peroxides can be burned in a similar manner, but it must be slowly heated to approximately 200 ° C to avoid splashes caused by sharp decomposition. The sulfate can be removed from 700 ° C. In order to ensure high purity products, heated to 1000 ° C.
Application
Due to the high melting point, irradiation stability, the same metallicity, and easy preparation, etc. is an applicable composition of nuclear fuel. EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc.
The melting point of β-trifutants is 2085 ± 25 ° C; it can be obtained from carbon dioxide and carbon in helium to 1625 ° C. The α-trioxide can be produced by heating dioxide to 1650 to 1800 ° C in vacuo. The alpha-trifutant is made of oxygen when melting of the chondrinoxide, and the melting point is 2360 ± 20 ° C.