耐火材料
耐火材料
내화재료
REFRACTORIES
2014年
2期
103-105,110
,共4页
王青峰%叶国田%穆元冬%朱玲玲%宋秀娟%张传银
王青峰%葉國田%穆元鼕%硃玲玲%宋秀娟%張傳銀
왕청봉%협국전%목원동%주령령%송수연%장전은
水合氧化铝%SiO2微粉%浇注料%烧结%中温强度
水閤氧化鋁%SiO2微粉%澆註料%燒結%中溫彊度
수합양화려%SiO2미분%요주료%소결%중온강도
hydrated alumina%microsilica%castable%sintering%intermediate temperatures
刚玉质浇注料的基本配比(w)为:6~3、3~1、≤1、≤0.045 mm的板状刚玉分别为20%、30%、20%、22%,活性Al2 O3微粉和水合氧化铝分别为3%和5%。以5%(w)SiO2微粉等量替代基本配比中≤0.045 mm的板状刚玉粉,研究了SiO2微粉对水合氧化铝结合刚玉质浇注料中温(600、800、1000℃)烧结的影响。此外,分别将水合氧化铝及质量比为11的SiO2微粉和水合氧化铝的混合物各加适量的水制备成浆体,用SEM对比观察110℃烘干和800℃处理后的显微结构变化。结果表明:1)在110℃烘干的情况下,SiO2微粉不仅填充了颗粒间隙,还同水合氧化铝的水化物形成交错互锁的网状结构,提高了含SiO2微粉浇注料的烘干强度;2)SiO2微粉在800℃能促进颗粒间的烧结,增强了颗粒间交错互锁的结合能力,使得含SiO2微粉的浇注料中温强度显著提高。
剛玉質澆註料的基本配比(w)為:6~3、3~1、≤1、≤0.045 mm的闆狀剛玉分彆為20%、30%、20%、22%,活性Al2 O3微粉和水閤氧化鋁分彆為3%和5%。以5%(w)SiO2微粉等量替代基本配比中≤0.045 mm的闆狀剛玉粉,研究瞭SiO2微粉對水閤氧化鋁結閤剛玉質澆註料中溫(600、800、1000℃)燒結的影響。此外,分彆將水閤氧化鋁及質量比為11的SiO2微粉和水閤氧化鋁的混閤物各加適量的水製備成漿體,用SEM對比觀察110℃烘榦和800℃處理後的顯微結構變化。結果錶明:1)在110℃烘榦的情況下,SiO2微粉不僅填充瞭顆粒間隙,還同水閤氧化鋁的水化物形成交錯互鎖的網狀結構,提高瞭含SiO2微粉澆註料的烘榦彊度;2)SiO2微粉在800℃能促進顆粒間的燒結,增彊瞭顆粒間交錯互鎖的結閤能力,使得含SiO2微粉的澆註料中溫彊度顯著提高。
강옥질요주료적기본배비(w)위:6~3、3~1、≤1、≤0.045 mm적판상강옥분별위20%、30%、20%、22%,활성Al2 O3미분화수합양화려분별위3%화5%。이5%(w)SiO2미분등량체대기본배비중≤0.045 mm적판상강옥분,연구료SiO2미분대수합양화려결합강옥질요주료중온(600、800、1000℃)소결적영향。차외,분별장수합양화려급질량비위11적SiO2미분화수합양화려적혼합물각가괄량적수제비성장체,용SEM대비관찰110℃홍간화800℃처리후적현미결구변화。결과표명:1)재110℃홍간적정황하,SiO2미분불부전충료과립간극,환동수합양화려적수화물형성교착호쇄적망상결구,제고료함SiO2미분요주료적홍간강도;2)SiO2미분재800℃능촉진과립간적소결,증강료과립간교착호쇄적결합능력,사득함SiO2미분적요주료중온강도현저제고。
The basic formulation is tabular corundum (6 -3 mm 20 mass%,3 -1 mm 30 mass%,≤1 mm 20 mass% and ≤0.045 mm 22 mass%),active alumina 3 mass% and hydrated alumina 5 mass%, 5 mass% microsilica was used to replace the equal amount of tabular corundum (≤0.045 mm)to study the effect of microsilica on sintering property of hydrated alumina bonded corundum castables at intermedi-ate temperatures (600,800 and 1 000 ℃).Moreover,hydrated alumina and mixture of micro silica and hy-drated alumina with mass ratio of 1 1 were prepared into slurries by adding water,respectively.The micro-structures of the slurries after dried at 1 10 ℃or treated at 800 ℃were observed by SEM.The results show that:(1)after dried at 110 ℃,microsilica not only fills the voids among the particles,but also reacts with the hydrates of hydrated alumina forming a interlocking structure,enhancing the strength of the castable with microsilica after drying;(2)microsilica promotes the sintering among the particles,and reinforces the inter-locking structure of the castable after heated at 800 ℃,obviously improving the strength of the castables with microsilica after fired at intermediate temperatures.