Nuclear grade carbonized turning powder can be directly synthesized. The mixture of high purity turning powder and high purity stone base powder (or petroleum coke) is prepared in a certain proportion and loaded into graphite kacan, heated to 190 ~ 2100℃ in vacuum protection, and then the boron carbide powder can be obtained after 30 minutes of heat preservation.Then the sintered agglomerates are pressed by the method of treating gold with powder.The hardness, strength and other properties of the sintered block are greatly affected by the pressing density of the block, and the strength and hardness of high density are also great.Density also affects its thermal properties.Thermal properties must be considered in reactor control rod design.

1. Thermal expansion: The thermal expansion coefficient of carbonized flip sintering block is 4.5 x 10 ℃ in the temperature zone of 25 ~100 ℃.It varies with temperature.In a relatively

The thermal geniculate system of sintered block with different density is different at low degree.

2. Thermal conductivity number: the thermal conductivity coefficient of carbonized boiling-sintering block, at 10 ℃, is 0.29 w/(℃.Cm).It is greatly influenced by the manufacturing process.Hot - pressed products, high density, thermal conductivity coefficient is also large.But they both fall as they rise.

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