Method for preparing hafnium boride powder by using boron/carbothermic method
A reduction method, hafnium boride technology, applied in the direction of boron/boride, metal boride, etc., can solve the problems of low purity and poor uniformity of powder, and achieve the effect of simple process, short time consumption and low raw material cost
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[0030] Example 1
[0031] With hafnium oxide (HfO 2 ) As a hafnium source, with boron carbide (B 4 C) As boron source, sucrose as carbon source;
[0032] (1) Weigh 100g HfO 2 Powder with a purity of 99.9% by weight and an average particle size of 50nm. Weigh 16.4g of boron carbide (B 4 C) Powder with a purity of 96wt% and an average particle size of 0.8μm. Put the two powders together in a ball milling tank, add absolute ethanol, add zirconia ball milling media, ball mill and mix for 24 hours, and move the mixed mixture to In a vessel containing 250ml of absolute ethanol, ultrasonically oscillate for 0.5h;
[0033] (2) Weigh 13.5g of sucrose and add it to 200ml of water, stir to make it evenly mixed, and then add it to the solution obtained in step (1), heating while magnetically stirring, heating temperature at 100℃, heating time for 8h to obtain a mixture Homogeneous reactant
[0034] (3). Put the reactant obtained in step (2) into a graphite crucible, and then put the graphite cru...
Example Embodiment
[0035] Example 2
[0036] With hafnium oxide (HfO 2 ) As a hafnium source, with boron carbide (B 4 C) As boron source, sucrose as carbon source;
[0037] (1) Weigh 100g HfO 2 Powder with a purity of 99.9% by weight and an average particle size of 100nm. Weigh 15.7g of boron carbide (B 4 C) Powder with a purity of 96.0wt% and an average particle size of 1μm. Put the two powders together in a ball milling tank, add absolute ethanol, add zirconia ball milling media, ball mill and mix for 12 hours, and move the mixed mixture to In a vessel containing 300ml of absolute ethanol, ultrasonically shake and disperse for 1 hour;
[0038] (2) Weigh 27.0g of sucrose and add it to 200ml of water, stir to make it evenly mixed, and then add it to the solution obtained in step 1), heating while magnetic stirring, heating temperature is 160℃, heating time is 4h, and the mixture is uniform Reactant
[0039] (3). Put the reactant obtained in step (2) into a graphite crucible, and then put the graphite c...
Example Embodiment
[0040] Example 3
[0041] With hafnium oxide (HfO 2 ) As a hafnium source, with boron carbide (B 4 C) As boron source, sucrose as carbon source;
[0042] (1) Weigh 100g HfO 2 Powder with a purity of 99.9% by weight and an average particle size of 80nm. Weigh 13.1g of boron carbide (B 4 C) Powder with a purity of 97% by weight and an average particle size of 1.5μm. Put the two powders together in a ball milling tank, add absolute ethanol, add zirconia ball milling media, ball mill and mix for 24 hours, then move the mixed mixture to In a vessel containing 300ml of absolute ethanol, ultrasonically oscillate for 0.5h;
[0043] (2) Weigh 22.5g of sucrose and add it to 200ml of water, stir to make it evenly mixed, and then add it to the solution obtained in step (1), heating while magnetically stirring, heating temperature is 130 ℃, heating time is 8h, get mixed Homogeneous reactant
[0044] (3). Put the reactant obtained in step (2) into a graphite crucible, and then put the graphite cru...
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