CN1123810A - 中温固化型电热涂料及其制造方法 - Google Patents

中温固化型电热涂料及其制造方法 Download PDF

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Publication number
CN1123810A
CN1123810A CN 94112626 CN94112626A CN1123810A CN 1123810 A CN1123810 A CN 1123810A CN 94112626 CN94112626 CN 94112626 CN 94112626 A CN94112626 A CN 94112626A CN 1123810 A CN1123810 A CN 1123810A
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sizing
coating
oxide
graphite
silicon
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郑义
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    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C8/00Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • C03C8/14Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Paints Or Removers (AREA)

Abstract

本发明提供了一种中温固化型电热涂料,其特征是:它以石墨粉作为导电粒子、以易熔玻璃作为粘料,其配方是:石墨:10-50%;玻璃粘料:50-90%,在玻璃粘料里各成分的比例是:氧化铅:65.5-71.5%;三氧化二硼:28.6-34.2%,二氧化硅:微量。本发明与现有技术相比,具有的特点是:均采用无机材料,无老化问题;经烧结,将导电粉末与基材烧为一体,涂层牢固;耐热性好;大电流负载能力强。

Description

中温固化型电热涂料及其制造方法
本发明涉及一种电热涂料。
迄今人们常用的电热涂料是由粘料和导电粒子组成,粘料本身不导电,在粘料里加入的导电粒子,构成链状连接,通电后形成网络式导电回路。电热涂料按固化形式分主要有两大类:
(1)、加温固化型:在一定温度下使原材料固化成电阻膜。这种电热涂料的导电粒子一般选用银粉或铜粉,银粉的导电性能良好,但价格昂贵,使之应用受到限制;铜粉本身的价格虽低于银粉,但它的表面氧化处理工艺比较复杂,氧化处理后的铜粉价格又升高了;
(2)、常温固化型:在室温下使各种原材料粘结固化成电阻膜。这种电热膜耐温性能差,导电电阻不够稳定,涂层电阻过大。
本发明的目的在于根据提供一种能避免上述两类涂料不足的中温固化型电热涂料。
本发明的目的是这样实现的:它以石墨粉作为导电粒子、以易熔玻璃作为粘料,经烧结处理,使石墨相连接,形成链状网络结构,实现导电回路。
一、本发明的组成及配方是:
1、导电粒子:石墨(C):10-50%;
2、玻璃粘料:50-90%,在玻璃粘料里各成分的比例是
(1)、氧化铅(PbO):65.5-71.5%
(2)、三氧化二硼(B2O3):28.6-34.2%
(3)、二氧化硅(SiO2):微量;
二、制造方法是:
根据比例称取氧化铅、氧化硼和氧化硅均匀混合,在800-1100℃的温度下熔炼,熔炼时间为25-55分钟,将熔炼好的料经48小时球磨,过300目筛,制成易熔玻璃粘料,将粘料与石墨粉均匀混合,加入松油醇,制成浆状,采用喷涂、刷涂或浸涂等工艺,在经过表面处理的底材上制涂层,首先在150-180℃下烘干10分钟左右,再于480-650℃下烧结10-30分钟,即可制成本发明。
本发明与现有技术相比,具有以下特点:
1、本发明的组分均采用无机材料,无老化问题。
2、经烧结,将导电粉末与基材烧为一体,涂层牢固,不脱落。
3、耐热性好。
4、大电流负载能力强。
下面给出一个实施例。
石墨(C):40%;
玻璃粘料:60%,在玻璃粘料里各成分的比例是
(1)、氧化铅(PbO):70%
(2)、三氧化二硼(B2O3):29%
(3)、二氧化硅(SiO2):余量;
根据上述比例称取氧化铅、氧化硼和氧化硅均匀混合,在1000℃的温度下熔炼,熔炼时间为35分钟,将熔炼好的料经48小时球磨,过300目筛,制成易熔玻璃粘料,将粘料与石墨粉均匀混合,加入松油醇,制成浆状,采用喷涂、刷涂或浸涂等工艺,在经过表面处理的底材上制涂层,首先在160℃下烘干10分钟左右,再于500℃下烧结30分钟,即可制成本发明。
本实施例的主要技术参数是:
涂层方块电阻<1欧/cm
长期耐温    :400℃
短期耐温    :450℃
耐湿        >95%
膜厚        :0.3-1.0mm
牢固度(划格法):100%

Claims (3)

1、一种中温固化型电热涂料,是由粘料和导电粒子组成,其特征是:它以石墨粉作为导电粒子、以易熔玻璃作为粘料,其配方是:
(1)、石墨(C):10-50%;
(2)、玻璃粘料:50-90%,在玻璃粘料里各成分的比例是
(2.1)、氧化铅(PbO):65.5-71.5%
(2.2)、三氧化二硼(B2O3):28.6-34.2%
(2.3)、二氧化硅(SiO2):微量。
2、一种制造权利要求1所述的涂料的方法,其特征是:根据比例称取氧化铅、氧化硼和氧化硅均匀混合,在800-1100℃的温度下熔炼,熔炼时间为25-55分钟,将熔炼好的料经48小时球磨,过300目筛,制成易熔玻璃粘料,将粘料与石墨粉均匀混合,加入松油醇,制成浆状,采用喷涂、刷涂或浸涂等工艺在经过表面处理的底材上制涂层,首先在150-180℃下烘干10分钟左右,再于480-650℃下烧结10-30分钟。
3、按权利要求1所述的涂料,其特征是:它的配方是:
石墨(C):40%;
玻璃粘料:60%,在玻璃粘料里各成分的比例是
(1)、氧化铅(PbO):70%
(2)、三氧化二硼(B2O3):29%
(3)、二氧化硅(SiO2):余量。
CN 94112626 1994-11-21 1994-11-21 中温固化型电热涂料及其制造方法 Pending CN1123810A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 94112626 CN1123810A (zh) 1994-11-21 1994-11-21 中温固化型电热涂料及其制造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 94112626 CN1123810A (zh) 1994-11-21 1994-11-21 中温固化型电热涂料及其制造方法

Publications (1)

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CN1123810A true CN1123810A (zh) 1996-06-05

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101864201B (zh) * 2009-04-15 2012-11-07 深圳市奥迪博士科技有限公司 导电发热钢化玻璃介质浆料及其制造方法
EP3685408A4 (en) * 2017-09-22 2021-06-09 Intelli Particle Pty Ltd ELECTROTHERMAL COMPOSITIONS AND COMPOSITES

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101864201B (zh) * 2009-04-15 2012-11-07 深圳市奥迪博士科技有限公司 导电发热钢化玻璃介质浆料及其制造方法
EP3685408A4 (en) * 2017-09-22 2021-06-09 Intelli Particle Pty Ltd ELECTROTHERMAL COMPOSITIONS AND COMPOSITES
US11814565B2 (en) 2017-09-22 2023-11-14 Intelli Particle Pty Ltd Electrothermic compositions and composites

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