CN106882950B - 一种硅溶胶增强耐高温磷酸盐胶黏剂的方法 - Google Patents

一种硅溶胶增强耐高温磷酸盐胶黏剂的方法 Download PDF

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CN106882950B
CN106882950B CN201510943920.1A CN201510943920A CN106882950B CN 106882950 B CN106882950 B CN 106882950B CN 201510943920 A CN201510943920 A CN 201510943920A CN 106882950 B CN106882950 B CN 106882950B
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刘娇娜
杨殿来
许壮志
薛健
张明
周岩
刘博�
胡金玲
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Abstract

本发明公开了一种硅溶胶增强耐高温磷酸盐胶黏剂的制备方法,以磷酸和氢氧化铝反应制得磷酸二氢铝为基料,以氧化硅、云母为填料,氧化镁为固化剂,添加氧化铜,制备的磷酸盐胶黏剂,并利用硅溶胶作为增强剂,提高胶黏剂的高粘结强度、耐磨损性、硬度等。同时制备胶黏剂所需的原料来源广泛,价格便宜,且制备工艺简单,易于工业化生产。

Description

一种硅溶胶增强耐高温磷酸盐胶黏剂的方法
技术领域
本发明涉及一种胶黏剂增强方法,尤其是一种硅溶胶增强耐高温磷酸盐胶黏剂的方法。
背景技术
磷酸盐胶黏剂由于具有耐高温性及耐热冲击性能好、抗腐蚀能力强、电学性能优良,良好的结构可设计性、热膨胀系数低等特点,它集中了金属与陶瓷的优点,是耐高温低介电损耗的理想材料。磷酸盐胶黏剂使用温度可达1500℃,而且固化温度低,甚至可以常温固化,制备方便,因此受到极大重视。磷酸盐胶黏剂在尖端科技领域中广泛应用。磷酸盐胶黏剂用于粘接高速飞行器绝热层,航天飞机耐高温材料,飞机发动机耐高温部件及耐火砖等。但目前常用的磷酸盐胶黏剂的强度较低,孔隙较多,硬度差,不耐冲击,限制了其在封接材料中的应用。
发明内容
本针对上述现有技术的缺点,本发明提供了一种耐高温强度高,孔隙率低的硅溶胶增强耐高温磷酸盐胶黏剂的方法。
为实现上述目的,本发明采用的技术方案是:一种硅溶胶增强耐高温磷酸盐胶黏剂,按重量份数其组分为:
磷酸二氢铝:100
二氧化硅:40-60
氧化铝:0-10
云母:0-10
氧化铜:10-20
氧化镁:10-20
硅溶胶:200。
硅溶胶增强耐高温磷酸盐胶黏剂的制备方法,其具体步骤为:
(1)按重量份数称量原料:磷酸二氢铝100,二氧化硅40-60,氧化铝0-10,云母0-10,氧化铜10-20,氧化镁10-20,硅溶胶200。
(2)将上述重量份数的二氧化硅,氧化铝;云母;氧化铜加入磷酸二氢铝中进行搅拌,研磨,混合均匀,制成浆料。
(3)将步骤(2)制得的浆料中加入氧化镁,并快速搅拌,制得用于粘接及封接使用的样品。
(4)将步骤(3)制得的样品经室温固化后,放入烘箱中在100-180℃下固化1-3h。
(5)固化后的样品疏松多孔,加入硅溶胶对其强度进行增强,并进行抽真空处理,在进行硅溶胶增强反复多次后,使硅溶胶进入孔隙中。
(6)将步骤(5)中硅溶胶增强后的样品在100-180℃下烘干1-2h后,进行高温固化,固化温度在600-800℃,保温时间在1-2h,得到成品。
本发明的主要优点和有益效果是:本发明研制的硅溶胶增强的磷酸盐胶黏剂,以磷酸胶黏剂为基体,加入硅溶胶进行性能增强,该材料具有更高粘结强度、更好的力学性能,耐高温性好,可在1500℃下长时间使用,能满足航空、航天飞行器隔热部位的需求。同时制备所需的原料来源广泛,便宜易得,且合成工艺简单,易于工业化生产。
具体实施方式
实施例1
取质量分数为85%的磷酸溶液:100克,氢氧化铝粉末:20克,向磷酸溶液中加入氢氧化铝粉末,不断搅拌,得到混合溶液,将混合溶液升温至80℃保温3h,得到磷酸二氢铝溶液。
取氧化硅:50克,氧化铝:8克,云母:10克,氧化铜:20克,加入到100克磷酸二氢铝中进行混合均匀,制成浆料,在浆料中加入氧化镁12克进行快速搅拌,制得用于粘接及封接使用的样品,样品经过室温固化后,放入100℃烘箱中烘干1h后,将样品加入硅溶胶进行增强,并在120℃的烘箱中进行烘干,并在620℃下保温2h,得到成品。
实施例2
取质量分数为85%的磷酸溶液:200克,氢氧化铝粉末:50克,向磷酸溶液中加入氢氧化铝粉末,不断搅拌,得到混合溶液,将混合溶液升温至110℃保温4h,得到磷酸二氢铝溶液。
取氧化硅:45克,氧化铝:10克,云母:10克,氧化铜:20克,加入到100克磷酸二氢铝中进行混合均匀,制成浆料,在浆料中加入氧化镁15克进行快速搅拌,制得用于粘接及封接使用的样品,样品经过室温固化后,放入170℃烘箱中烘干2h后,将样品加入硅溶胶进行增强,并在170℃的烘箱中进行烘干,并在820℃下保温1.5h,得到成品。

Claims (1)

1.一种硅溶胶增强耐高温磷酸盐胶黏剂的方法,其特征在于,按重量份数其组分为:
磷酸二氢铝:100
二氧化硅:40-60
氧化铝:0-10
云母:0-10
氧化铜:10-20
氧化镁:10-20
硅溶胶:200;
具体步骤为:
(1)按重量份数称量原料:磷酸二氢铝100,二氧化硅40-60,氧化铝0-10,云母0-10,氧化铜10-20,氧化镁10-20,硅溶胶200;
(2)将上述重量份数的二氧化硅,氧化铝,云母,氧化铜加入磷酸二氢铝中进行搅拌,研磨,混合均匀,制成浆料;
(3)将步骤(2)制得的浆料中加入氧化镁,并快速搅拌,制得用于粘接及封接使用的样品;
(4)将步骤(3)制得的样品经室温固化后,放入烘箱中在100-180℃下固化1-3h;
(5)固化后的样品疏松多孔,加入硅溶胶对其强度进行增强,并进行抽真空处理,在进行硅溶胶增强反复多次后,使硅溶胶进入孔隙中;
(6)将步骤(5)中硅溶胶增强后的样品在100-180℃下烘干1-2h后,进行高温固化,固化温度在600-800℃,保温时间在1-2h,得到成品。
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CN108484083A (zh) * 2018-04-20 2018-09-04 华北理工大学 一种高温粘结剂的制备方法及应用
CN110511682A (zh) * 2018-05-22 2019-11-29 天津大学(青岛)海洋工程研究院有限公司 一种高通用性耐高温的磷酸铝盐胶黏剂及其制备方法
CN111269000A (zh) * 2020-01-19 2020-06-12 中南大学 强界面化学键合的磷酸盐隔热层、其制备方法及复合材料
CN115353366B (zh) * 2022-09-06 2023-07-18 永康市瑞盛科技有限公司 一种防火门用发泡胶

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