CN106187114A - 一种高耐热高强度的氧化铝纤维的制备方法 - Google Patents
一种高耐热高强度的氧化铝纤维的制备方法 Download PDFInfo
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Abstract
本发明公开了一种高耐热高强度的氧化铝纤维的制备方法,其制备步骤依次如下:1)氧化铝溶胶制备;将金属铝和铝盐的水溶液反应,回流,金属铝溶解完全,然后过滤,得到氧化铝溶胶;备用;2)二氧化硅溶胶的制备;3)将氧化铝溶胶和二氧化硅溶胶混合,并添加聚乙二醇和硬脂酸;调节PH值到6.5~6.8;4)将步骤3)得到的溶液进行浓缩,干法纺丝,得凝胶纤维,然后将凝胶纤维热解是在氦气氛中升温至1000~1300℃,除杂,即获得陶瓷纤维毛坏,然后进行1500~1600℃温度下进行烧结即得成品。本发明氧化铝纤维通过与本发明中的其他组合物相互作用,克服了氧化铝纤维中常出现的断丝率高,成品性能难以保证的技术问题。
Description
技术领域
本发明属于耐火隔热材料领域,具体涉及一种高耐热高强度的氧化铝纤维的制备方法。
背景技术
氧化铝纤维导热率、加热收缩率和热容都较低。长期使用温度为1300~1400℃,高于普通硅酸铝纤维(1000~1100℃)。它具有较好的化学稳定性,可在酸性环境、氧化气氛、还原气氛和真空条件下使用,对碱性环境也有一定耐蚀性,但易受铅蒸气和五氧化二钒的侵蚀。这种纤维主要用做钢铁工业各种热处理炉、陶瓷烧成窑、石油化工中的裂解炉、燃烧炉等的隔热炉衬,节能效果显著。对间歇作业的窑炉还能较大幅度地增加产品产量。此外,它可用做化学工业中的催化剂载体,称为氧化铝载体。核反应堆及航天飞机的隔热材料,轻合金的增强材料等。
现有的氧化铝纤维在制备过程中断线率高,其成品质量强度难以保证。
发明内容
发明目的:为解决现有技术的不足,本发明的目的在于提供一种高透气性的合成纤维组合物及其制备方法。
技术方案:实现本发明目的的技术解决方案为:本发明提供了一种高耐热高强度的氧化铝纤维的制备方法,其制备步骤依次如下:
1)氧化铝溶胶制备;将金属铝和铝盐的水溶液反应,回流,金属铝溶解完全,然后过滤,得到氧化铝溶胶;备用;
2)二氧化硅溶胶的制备;
3)将氧化铝溶胶和二氧化硅溶胶混合,并添加聚乙二醇和硬脂酸;调节PH值到6.5~6.8;
4)将步骤3)得到的溶液进行浓缩,干法纺丝,得凝胶纤维,然后将凝胶纤维热解是在氦气氛中升温至1000~1300℃,除杂,即获得陶瓷纤维毛坏,然后进行1500~1600℃温度下进行烧结即得成品。
优选地,所述聚乙二醇的加入量为溶液总量的0.2~0.25%。
优选地,所述硬脂酸的加入量为溶液总量的5~8%。。
有益效果:本发明与现有技术相比,其优点是:
本发明氧化铝纤维通过与本专利中的其他组合物相互作用,克服了氧化铝纤维中常出现的断丝率高,成品性能难以保证的技术问题。
具体实施方式
下面对本发明作进一步详细描述。
实施例1
一种高透气性的合成纤维组合物,按重量份计包括如下组分:
聚酰亚胺纤维100份、高铝矾土熟料20份、铝酸钙水泥5份、聚醋酸乙烯酯乳液2份、甲苯基二苯基磷酸酯6份,硬脂酸1份,聚乙烯2份,聚对苯二甲酸丁二酯2份。
上述高透气性的合成纤维组合物的制备方法,其制备步骤为:
1)、按重量称取相应原料组分,混合搅拌成料浆,使料浆呈流动性;
2)、将料浆倒入环形模具内,利用振动台振动或手持搅棒捣弄模具内的浆料,使浆料内的气泡充分排除,浆料密实,然后静止凝固;
3)、凝固出模,在室温下干燥20小时,再入80℃烘箱干燥26小时;
4)、将干燥后的环形坯体放入窑炉内加温至1300℃,保温4小时即可出炉。
实施例2
一种高透气性的合成纤维组合物,按重量份计包括如下组分:
聚酰亚胺纤维100份、高铝矾土熟料18份、铝酸钙水泥7份、聚醋酸乙烯酯乳液3份、甲苯基二苯基磷酸酯8份,硬脂酸2份,聚乙烯32~4份,聚对苯二甲酸丁二酯6份。
上述高透气性的合成纤维组合物的制备方法,其制备步骤为:
1)、按重量称取相应原料组分,混合搅拌成料浆,使料浆呈流动性;
2)、将料浆倒入环形模具内,利用振动台振动或手持搅棒捣弄模具内的浆料,使浆料内的气泡充分排除,浆料密实,然后静止凝固;
3)、凝固出模,在室温下干燥24小时,再入80℃烘箱干燥32小时;
4)、将干燥后的环形坯体放入窑炉内加温至1300℃,保温5小时即可出炉。
实施例1和2相对于传统纤维材料,其透气性能显著提高。
应当指出:对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (3)
1.一种高耐热高强度的氧化铝纤维的制备方法,其特征在于:其制备步骤依次如下:
1)氧化铝溶胶制备;将金属铝和铝盐的水溶液反应,回流,金属铝溶解完全,然后过滤,得到氧化铝溶胶;备用;
2)二氧化硅溶胶的制备;
3)将氧化铝溶胶和二氧化硅溶胶混合,并添加聚乙二醇和硬脂酸;调节PH值到6.5~6.8;
4)将步骤3)得到的溶液进行浓缩,干法纺丝,得凝胶纤维,然后将凝胶纤维热解是在氦气氛中升温至1000~1300℃,除杂,即获得陶瓷纤维毛坏,然后进行1500~1600℃温度下进行烧结即得成品。
2.根据权利要求1中的一种高耐热性能的氧化铝纤维的制备方法,其特征在于:所述聚乙二醇的加入量为溶液总量的0.2~0.25%。
3.根据权利要求1中的一种高耐热性能的氧化铝纤维的制备方法,其特征在于:所述硬脂酸的加入量为溶液总量的5~8%。
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CN110662411A (zh) * | 2019-09-12 | 2020-01-07 | 西北核技术研究院 | 一种具有绝缘性能自恢复的电力电气设备及其使用方法 |
CN113620693A (zh) * | 2021-09-09 | 2021-11-09 | 成都海鑫高科技有限公司 | 一种Gamma氧化铝纤维的制备方法 |
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CN110662411A (zh) * | 2019-09-12 | 2020-01-07 | 西北核技术研究院 | 一种具有绝缘性能自恢复的电力电气设备及其使用方法 |
CN113620693A (zh) * | 2021-09-09 | 2021-11-09 | 成都海鑫高科技有限公司 | 一种Gamma氧化铝纤维的制备方法 |
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