Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of high-purity alumina fiber reinforced alumina composite material
The invention discloses a preparation method of a high-purity alumina fiber reinforced alumina composite material, which comprises the following steps: adding chopped alumina fiber into water, adding a small amount of acid, and barreling by using high-purity alumina balls; the preparation method comprises the following steps: preparing alumina fiber, adding high-purity nanometer alumina dispersion liquid, continuously adding alumina sol, fully dispersing the mixture, carrying out spray drying to obtain alumina fiber reinforced alumina composite powder, carrying out dry pressing and isostatic pressing on the composite powder to prepare 5-30mm ceramic balls, and carrying out high-temperature sintering. The fiber powder is fibers in a microscopic level and powder in a macroscopic level, and is easier to form into balls, the toughness is greatly increased after use, the nanometer aluminum oxide powder has excellent sintering activity and is sintered at a lower temperature, aluminum oxide grains are not easy to grow and have better toughness, the aluminum sol is used as an adhesive and has low-temperature sinterability, and the powder and the fibers are bonded, so that the strength of the fiber powder is greatly improved. And finally, aluminum oxide is generated through high-temperature sintering, impurities are avoided, and the yield is high.
本发明公开了一种高纯度氧化铝纤维增强氧化铝复合材料的制备方法，包括以下步骤：将短切氧化铝纤维加入水中，再加入少量的酸，使用高纯度氧化铝球进行滚磨；再加入高纯度纳米氧化铝分散液，继续加入铝溶胶，将上述混合物充分分散后，经过喷雾干燥得到氧化铝纤维增强氧化铝复合粉，将该复合粉经过干压、等静压后，制备成5‑30mm的陶瓷球，经过高温烧结而成。纤维粉在微观下是纤维，宏观是粉体，更易成型成球，使用后韧性大幅度增加，纳米氧化铝粉体具备优异的烧结活性，在更低温度进行烧结，使用氧化铝晶粒不易长大，具备更好的韧性，铝溶胶作为粘合剂，具备低温烧结性，将粉体及纤维进行粘合，最终高温烧结又生成氧化铝，无杂质，产率高。
Preparation method of high-purity alumina fiber reinforced alumina composite material
The invention discloses a preparation method of a high-purity alumina fiber reinforced alumina composite material, which comprises the following steps: adding chopped alumina fiber into water, adding a small amount of acid, and barreling by using high-purity alumina balls; the preparation method comprises the following steps: preparing alumina fiber, adding high-purity nanometer alumina dispersion liquid, continuously adding alumina sol, fully dispersing the mixture, carrying out spray drying to obtain alumina fiber reinforced alumina composite powder, carrying out dry pressing and isostatic pressing on the composite powder to prepare 5-30mm ceramic balls, and carrying out high-temperature sintering. The fiber powder is fibers in a microscopic level and powder in a macroscopic level, and is easier to form into balls, the toughness is greatly increased after use, the nanometer aluminum oxide powder has excellent sintering activity and is sintered at a lower temperature, aluminum oxide grains are not easy to grow and have better toughness, the aluminum sol is used as an adhesive and has low-temperature sinterability, and the powder and the fibers are bonded, so that the strength of the fiber powder is greatly improved. And finally, aluminum oxide is generated through high-temperature sintering, impurities are avoided, and the yield is high.
本发明公开了一种高纯度氧化铝纤维增强氧化铝复合材料的制备方法，包括以下步骤：将短切氧化铝纤维加入水中，再加入少量的酸，使用高纯度氧化铝球进行滚磨；再加入高纯度纳米氧化铝分散液，继续加入铝溶胶，将上述混合物充分分散后，经过喷雾干燥得到氧化铝纤维增强氧化铝复合粉，将该复合粉经过干压、等静压后，制备成5‑30mm的陶瓷球，经过高温烧结而成。纤维粉在微观下是纤维，宏观是粉体，更易成型成球，使用后韧性大幅度增加，纳米氧化铝粉体具备优异的烧结活性，在更低温度进行烧结，使用氧化铝晶粒不易长大，具备更好的韧性，铝溶胶作为粘合剂，具备低温烧结性，将粉体及纤维进行粘合，最终高温烧结又生成氧化铝，无杂质，产率高。
Preparation method of high-purity alumina fiber reinforced alumina composite material
一种高纯度氧化铝纤维增强氧化铝复合材料的制备方法
WU YONGLONG (Autor:in) / WANG ZHEN (Autor:in) / DONG RUIWEI (Autor:in) / WANG YUHU (Autor:in)
02.04.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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