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采用粉末冶金技术制备了铁族金属(Ni、Co、Fe)掺杂的R2O-B2O3-Al2O3-SiO2系陶瓷结合剂。研究了添加不同铁族金属对R2O-B2O3-Al2O3-SiO2系陶瓷结合剂耐火度、流动性、微观结构、氧化性能以及抗折强度的影响。结果表明:结合剂耐火度随着金属Co粉添加量的增加而升高,在Fe粉的添加量小于20%(质量分数,下同)时结合剂耐火度有明显的降低趋势,Ni粉的加入对陶瓷结合剂耐火度影响不大;在空气气氛下750℃烧结时,所添加的金属粉均有部分发生氧化,氧化程度为Fe>Co>Ni;添加金属粉后结合剂抗折强度均有不同程度的提高,其中添加25%Co的结合剂强度最高,达到75.42MPa,所添加的金属颗粒与陶瓷结合剂结合紧密程度为Co>Ni>Fe。
The R2O-B2O3-Al2O3-SiO2 ceramic bonding agent doped with iron group metal (Ni, Co, Fe) was prepared by powder metallurgy. The effects of adding different iron group metals on the refractoriness, fluidity, microstructure, oxidation properties and flexural strength of R2O-B2O3-Al2O3-SiO2 ceramics were investigated. The results show that the refractoriness of the binder increases with the increase of the amount of metal Co powder, and the refractoriness of the binder decreases obviously when the amount of Fe powder is less than 20% (mass fraction) When added in the air atmosphere at 750 ℃, the metal powders added all have partial oxidation, the degree of oxidation is Fe> Co> Ni. After the metal powders are added, the flexural strength of the binder is There are different degrees of improvement, in which the addition of 25% Co bond strength of the highest, reaching 75.42MPa, the added metal particles and ceramic bonding agent binding degree of Co> Ni> Fe.