Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ceramic grinding ball adopting gamma aluminum oxide and preparation method
The invention relates to a preparation method of a ceramic grinding ball adopting gamma aluminum oxide. The preparation method comprises the following steps: pre-grinding, flocculating, pre-sintering, crushing and coarse grinding, forming, drying and sintering. The preparation method disclosed by the invention has the beneficial effects that gamma-Al2O3, silicon dioxide, talc, calcium carbonate and lanthanum oxide are subjected to pre-grinding and pre-sintering treatment, so that the requirement of a product on high fineness of molded powder is reduced, and powder with relatively fine fineness is obtained through grinding; solid solution strengthening is carried out on aluminum oxide crystals, a solid solution structure LaAlO3 is formed, and the mechanical property is improved; the added BOZn can adsorb free Na < + > in an Al2O3 structure while providing a glass phase and reducing the temperature required by pre-sintering, so that the influence on the conversion rate of a final corundum phase due to the generation of sodium peraluminate is avoided, the generation of beta-Al2O3 is avoided, and the subsequent sintering densification time can be saved; the airflow mill is adopted to further finely grind the particles, so that the ball blank grows quickly, the granulation difficulty can be reduced, the aging and homogenizing time can be saved, and the forming performance of the powder is effectively improved.
本发明涉及一种采用伽马氧化铝的陶瓷研磨球的制备方法，包括步骤：预磨、絮凝、预烧、破碎粗磨、成型、干燥及烧结。本发明的有益效果是：对γ‑Al2O3、二氧化硅、滑石、碳酸钙和氧化镧进行预磨和预烧处理，减少产品对成型粉体的高细度要求，研磨得到较粗细度的粉料；对氧化铝晶体的固溶强化，形成固溶结构LaAlO3，力学性能得到提高；增加的B₂O₆Zn₃在提供玻璃相降低预烧所需温度的同时，也能吸附Al2O3结构中游离的Na+，避免生成高铝酸钠影响最终刚玉相的转化率，避免β‑Al2O3的生成，可以节省后续烧结致密化的时间；采用气流磨对颗粒进行进一步细磨，使球坯快速生长，能够降低造粒难度，能省去陈腐均化的时间，有效提高粉体的成型性能。
Ceramic grinding ball adopting gamma aluminum oxide and preparation method
The invention relates to a preparation method of a ceramic grinding ball adopting gamma aluminum oxide. The preparation method comprises the following steps: pre-grinding, flocculating, pre-sintering, crushing and coarse grinding, forming, drying and sintering. The preparation method disclosed by the invention has the beneficial effects that gamma-Al2O3, silicon dioxide, talc, calcium carbonate and lanthanum oxide are subjected to pre-grinding and pre-sintering treatment, so that the requirement of a product on high fineness of molded powder is reduced, and powder with relatively fine fineness is obtained through grinding; solid solution strengthening is carried out on aluminum oxide crystals, a solid solution structure LaAlO3 is formed, and the mechanical property is improved; the added BOZn can adsorb free Na < + > in an Al2O3 structure while providing a glass phase and reducing the temperature required by pre-sintering, so that the influence on the conversion rate of a final corundum phase due to the generation of sodium peraluminate is avoided, the generation of beta-Al2O3 is avoided, and the subsequent sintering densification time can be saved; the airflow mill is adopted to further finely grind the particles, so that the ball blank grows quickly, the granulation difficulty can be reduced, the aging and homogenizing time can be saved, and the forming performance of the powder is effectively improved.
本发明涉及一种采用伽马氧化铝的陶瓷研磨球的制备方法，包括步骤：预磨、絮凝、预烧、破碎粗磨、成型、干燥及烧结。本发明的有益效果是：对γ‑Al2O3、二氧化硅、滑石、碳酸钙和氧化镧进行预磨和预烧处理，减少产品对成型粉体的高细度要求，研磨得到较粗细度的粉料；对氧化铝晶体的固溶强化，形成固溶结构LaAlO3，力学性能得到提高；增加的B₂O₆Zn₃在提供玻璃相降低预烧所需温度的同时，也能吸附Al2O3结构中游离的Na+，避免生成高铝酸钠影响最终刚玉相的转化率，避免β‑Al2O3的生成，可以节省后续烧结致密化的时间；采用气流磨对颗粒进行进一步细磨，使球坯快速生长，能够降低造粒难度，能省去陈腐均化的时间，有效提高粉体的成型性能。
Ceramic grinding ball adopting gamma aluminum oxide and preparation method
一种采用伽马氧化铝的陶瓷研磨球及制备方法
WANG CHENGDONG (Autor:in) / LUO JIAYE (Autor:in) / ZHOU XIONG (Autor:in) / TAO HUASHANG (Autor:in) / LI QIANG (Autor:in)
26.01.2024
Patent
Elektronische Ressource
Chinesisch
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