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Aluminum nitride powder and preparation method thereof
The invention relates to a preparation method of aluminum nitride powder, which comprises the following steps: by taking commercial aluminum nitride powder as a raw material, carrying out high-temperature step-by-step and different atmosphere treatment to realize a carbon thermal reduction reaction of an oxide film on the surface of a particle, and effectively removing an amorphous oxide layer and residual carbon on the surface of the aluminum nitride powder. The oxygen content of the prepared high-purity aluminum nitride powder is smaller than or equal to 0.40 wt%, the carbon content is smaller than or equal to 300 ppm, the hot-pressed aluminum nitride ceramic with the heat conductivity larger than or equal to 130 W.m <-1 >. K <-1 > and without a sintering aid can be prepared from the powder, and the hot-pressed aluminum nitride ceramic is far higher than hot-pressed aluminum nitride ceramic prepared from commercially available raw materials.
本发明涉及一种氮化铝粉体的制备方法，以商用氮化铝粉体为原料，通过高温分步和不同气氛处理，实现颗粒表面氧化膜的碳热还原反应，有效去除氮化铝粉体表面非晶氧化层和残余碳。本发明制备的高纯氮化铝粉体的氧含量≤0.40wt％、碳含量≤300ppm，采用该粉体可制备出热导率≥130W·m‑1·K‑1的不含烧结助剂的热压氮化铝陶瓷，远高于采用市售原料制备的热压氮化铝陶瓷。
Aluminum nitride powder and preparation method thereof
The invention relates to a preparation method of aluminum nitride powder, which comprises the following steps: by taking commercial aluminum nitride powder as a raw material, carrying out high-temperature step-by-step and different atmosphere treatment to realize a carbon thermal reduction reaction of an oxide film on the surface of a particle, and effectively removing an amorphous oxide layer and residual carbon on the surface of the aluminum nitride powder. The oxygen content of the prepared high-purity aluminum nitride powder is smaller than or equal to 0.40 wt%, the carbon content is smaller than or equal to 300 ppm, the hot-pressed aluminum nitride ceramic with the heat conductivity larger than or equal to 130 W.m <-1 >. K <-1 > and without a sintering aid can be prepared from the powder, and the hot-pressed aluminum nitride ceramic is far higher than hot-pressed aluminum nitride ceramic prepared from commercially available raw materials.
本发明涉及一种氮化铝粉体的制备方法，以商用氮化铝粉体为原料，通过高温分步和不同气氛处理，实现颗粒表面氧化膜的碳热还原反应，有效去除氮化铝粉体表面非晶氧化层和残余碳。本发明制备的高纯氮化铝粉体的氧含量≤0.40wt％、碳含量≤300ppm，采用该粉体可制备出热导率≥130W·m‑1·K‑1的不含烧结助剂的热压氮化铝陶瓷，远高于采用市售原料制备的热压氮化铝陶瓷。
Aluminum nitride powder and preparation method thereof
一种氮化铝粉体及其制备方法
ZHONG SHUMIAO (author) / GU SIYONG (author) / ZHANG HOUAN (author) / LU HUIFENG (author) / XU ZHIKAI (author) / LI TAO (author) / MA JIDONG (author) / QIAO DONGXU (author)
2024-03-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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