CN115246741A - 一种传热速度快高绝缘的氮化硅陶瓷电极及制备方法 - Google Patents
一种传热速度快高绝缘的氮化硅陶瓷电极及制备方法 Download PDFInfo
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Abstract
本发明提供一种传热速度快高绝缘的氮化硅陶瓷电极及制备方法,涉及电极生产领域。该传热速度快高绝缘的氮化硅陶瓷电极及制备方法,包括陶瓷绝缘套,所述陶瓷绝缘套内部嵌入固定设置有组合电极,具体包括以下步骤,S1.原材料制备,选择Si3N4粉和AlN粉料作为该电极的原材料,将Si3N4粉、AlN粉料和氧化物烧结助剂充分搅拌混合,制备成陶瓷粉,S2.粉料球磨,在陶瓷粉中加入适量球磨介质,然后放到球磨机中进行球磨,S3.浆料处理,S4.造粒,S5.压坯,S6.烧结,S7.电极安装。通过将陶瓷绝缘套采用氮化硅陶瓷材料经过气氛烧结而成,具有高强度、高绝缘性、高导热的特点,热量传输速度快,适用于液体加热用途,提升该电极的实用性。
Description
技术领域
本发明涉及电极生产领域,具体为一种传热速度快高绝缘的氮化硅陶瓷电极及制备方法。
背景技术
氮化硅陶瓷是一种烧结时不收缩的无机材料陶瓷,氮化硅的强度很高,尤其是热压氮化硅,是世界上最坚硬的物质之一,具有高强度、低密度、耐高温的性质,氮化硅陶瓷作为一种优异的高温工程材料,最能发挥优势的是其在高温领域中的应用,它极耐高温,强度一直可以维持到1200℃的高温而不下降,受热后不会熔成融体,一直到1900℃才会分解,并有惊人的耐化学腐蚀性能,能耐几乎所有的无机酸和30%以下的烧碱溶液,也能耐很多有机酸的腐蚀,同时又是一种高性能电绝缘材料,因此,其可以在锅具中作为新型的加热电极进行使用。
现有的陶瓷电极,虽然可以满足基本的加热功能,但是现有的电极所使用的陶瓷材料强度较差,并且绝缘性能和导热性能不佳,在使用时,会导致电能的转化效率不高,功率较大,存在安全隐患,同时,现有的陶瓷电极原材料的烧结难度较高,导致整体的成型工艺较为复杂,不利于提升加工生产效率,实用性不强。
发明内容
(一)解决的技术问题
针对现有技术的不足,本发明提供了一种传热速度快高绝缘的氮化硅陶瓷电极及制备方法,解决了现有的陶瓷电极强度较差,绝缘性和导热性不佳,实用性不强,并且整体材料的成型工艺难度较高问题。
(二)技术方案
为实现以上目的,本发明通过以下技术方案予以实现:一种传热速度快高绝缘的氮化硅陶瓷电极,包括陶瓷绝缘套,所述陶瓷绝缘套内部嵌入固定设置有组合电极。
一种传热速度快高绝缘的氮化硅陶瓷电极制备方法,具体包括以下步骤:
S1.原材料制备
选择Si3N4粉和AlN粉料作为该电极的原材料,将Si3N4粉、AlN粉料和氧化物烧结助剂充分搅拌混合,制备成陶瓷粉;
S2.粉料球磨
在陶瓷粉中加入适量球磨介质,然后放到球磨机中进行球磨;
S3.浆料处理
将球磨后的陶瓷浆料烘干、过筛,加入胶结剂,制成陶瓷原料;
S4.造粒
将陶瓷原料进行干燥,经过干燥后,使用喷雾造粒塔进行造粒,制成造粒粉;
S5.压坯
将制成的造粒粉通过液压机进行毛坯压制,得到陶瓷生坯;
S6.烧结
将陶瓷生坯通过气氛烧结炉进行气氛烧结,制得陶瓷成品;
S7.电极安装
将电极电阻和制得的陶瓷成品进行组装,在电极外加装连接线,得到成品的陶瓷电极。
优选的,所述S1中,氧化物烧结助剂为La2O3、Y2O3、SiO2三种氧化物的混合物。
优选的,所述S2中,球磨介质为无水乙醇。
优选的,所述S3中,胶结剂为聚乙烯醉缩丁醛胶结剂。
优选的,所述S5中液压机为四柱压机。
优选的,所述S6中烧结温度为2300~2400℃。
优选的,所述S6中成品相对密度为99.8%,弯曲强度为770-795MPa,热导率为85-90W/m·K。
(三)有益效果
本发明提供了一种传热速度快高绝缘的氮化硅陶瓷电极及制备方法。具备以下有益效果:
1、本发明提供了一种传热速度快高绝缘的氮化硅陶瓷电极及制备方法,相较于现有的陶瓷电极,该陶瓷电极通过将陶瓷绝缘套和组合电极进行组合安装,陶瓷绝缘套采用氮化硅陶瓷材料经过气氛烧结而成,具有高强度、高绝缘性、高导热的特点,热量传输速度快,适用于液体加热用途,提升该电极的实用性。
2、本发明提供了一种传热速度快高绝缘的氮化硅陶瓷电极及制备方法,相较于现有的陶瓷电极,该陶瓷电极通过将Si3N4粉和AlN粉料作为该电极的原材料,AlN具有很高的热导率,介电性较好,电绝缘强度较高,密度较低、无毒等优点,并且具有更匹配于Si材料的线膨胀系数,添加到Si3N4中可以更好地实现各单相材料优势的互补与叠加,得到综合性能更为理想的陶瓷材料。
3、本发明提供了一种传热速度快高绝缘的氮化硅陶瓷电极及制备方法,相较于现有的陶瓷电极,该陶瓷电极通过La2O3、Y2O3、SiO2三种氧化物烧结助剂的添加,可以有效控制材料的液相黏度,提高相转变,防止固溶体的形成,降低晶格含氧量以及控制玻璃相的组成和含量,促进陶瓷的烧结,提高致密性,并降低整体材料的成型工艺难度。
附图说明
图1为本发明的轴测示意图;
图2为本发明的正视示意图;
图3为本发明的正剖视示意图;
图4为本发明的侧剖视示意图。
其中,1、陶瓷绝缘套;2、组合电极。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例:
如图1-4所示,本发明实施例提供一种传热速度快高绝缘的氮化硅陶瓷电极,包括陶瓷绝缘套1,陶瓷绝缘套1内部嵌入固定设置有组合电极2,陶瓷绝缘套1采用氮化硅陶瓷材料经过气氛烧结而成,具有高强度、高绝缘性、高导热的特点,热量传输速度快,适用于液体加热用途,组合电极2由电极和电阻丝组成,电阻丝外连接有连接线,有利于确保该电极使用时的发热效果,便于使用者将该电极和其他装置进行连接,提高该电极的实用性。
一种传热速度快高绝缘的氮化硅陶瓷电极制备方法,具体包括以下步骤:
S1.原材料制备
选择Si3N4粉和AlN粉料作为该电极的原材料,将Si3N4粉、AlN粉料和氧化物烧结助剂充分搅拌混合,制备成陶瓷粉,有利于提升各原材料的混合均匀程度,便于后续对其进行进一步加工,提升成品质地的均匀程度,确保成品品质;
S2.粉料球磨
在陶瓷粉中加入适量球磨介质,然后放到球磨机中进行球磨,通过球磨机,利用下落的研磨体的冲击作用以及研磨体与球磨内壁的研磨作用而将物料粉碎并混合,降低成品的加工成本,同时降低使用者的操作难度,提升成品的品质;
S3.浆料处理
将球磨后的陶瓷浆料烘干、过筛,加入胶结剂,制成陶瓷原料,有利于进一步去除原材料中的杂质或较大的颗粒,提升成品的均匀度和精细程度,提升成品的外观和使用效果;
S4.造粒
将陶瓷原料进行干燥,经过干燥后,使用喷雾造粒塔进行造粒,制成造粒粉,有利于保证原材料具有良好的成型性和坯体的机械强度,经高温煅烧后配体成型效果好,坯体中不留其他残留杂质,工艺简单,没有腐蚀性,对陶瓷性能无不良影响,制得的陶瓷粉体原材料颗粒度粒径适中,确保成品的质量;
S5.压坯
将制成的造粒粉通过液压机进行毛坯压制,得到陶瓷生坯,有利于提升原材料之间的压合程度,避免坯体中出现压缩不均匀的位置或产生孔隙,影响成品效果;
S6.烧结
将陶瓷生坯通过气氛烧结炉进行气氛烧结,制得陶瓷成品,有利于减少气氛中有害成分对产品的不良影响,同时,真空有利于排除吸附气体、孔隙中的残留气体以及反应气体产物,对促进烧结后期的收缩有明显作用,提升烧成的毛坯整体的效果;
S7.电极安装
将电极电阻和制得的陶瓷成品进行组装,在电极外加装连接线,得到成品的陶瓷电极,有利于降低使用者的使用难度,提升成品的使用效果,提高成品的实用性。
S1中,氧化物烧结助剂为La2O3、Y2O3、SiO2三种氧化物的混合物,La2O3、Y2O3、SiO2三种氧化物烧结助剂的添加,可以有效控制材料的液相黏度,提高相转变,防止固溶体的形成,降低晶格含氧量以及控制玻璃相的组成和含量,促进陶瓷的烧结,提高致密性,S2中,球磨介质为无水乙醇,通过加入球磨介质,可以提高球磨效率,缩短球磨时间,对于降低能耗有重要意义,有利于提升球磨时的效果,确保球磨的均匀程度,S3中,胶结剂为聚乙烯醉缩丁醛胶结剂,该胶结剂对各种表面都具有优良的黏附性,掺入原材料中能增进黏附力,提升后期进行压坯时坯体的成型效果,S5中液压机为四柱压机,四柱压机以压缩空气作为动力源,高效率且容易操作,结构简单,极少维修,通过使用四柱压机,可根据不同的产品或模具,任意调整高度、速度、行程、压力和冲压时间,确保成品的生坯无缝隙或气孔,提升生坯的致密程度,确保成品率,避免原材料浪费,节约生产成本,S6中烧结温度为2300~2400℃,有利于确保生坯可以彻底烧透,确保成品的使用效果,S6中成品相对密度为99.8%,弯曲强度为770-795MPa,热导率为85-90W/m·K,有利于实现成品在各方面使用上的性能。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。
Claims (8)
1.一种传热速度快高绝缘的氮化硅陶瓷电极,包括陶瓷绝缘套(1),其特征在于:所述陶瓷绝缘套(1)内部嵌入固定设置有组合电极(2)。
2.一种传热速度快高绝缘的氮化硅陶瓷电极制备方法,其特征在于,具体包括以下步骤:
S1.原材料制备
选择Si3N4粉和AlN粉料作为该电极的原材料,将Si3N4粉、AlN粉料和氧化物烧结助剂充分搅拌混合,制备成陶瓷粉;
S2.粉料球磨
在陶瓷粉中加入适量球磨介质,然后放到球磨机中进行球磨;
S3.浆料处理
将球磨后的陶瓷浆料烘干、过筛,加入胶结剂,制成陶瓷原料;
S4.造粒
将陶瓷原料进行干燥,经过干燥后,使用喷雾造粒塔进行造粒,制成造粒粉;
S5.压坯
将制成的造粒粉通过液压机进行毛坯压制,得到陶瓷生坯;
S6.烧结
将陶瓷生坯通过气氛烧结炉进行气氛烧结,制得陶瓷成品;
S7.电极安装
将电极电阻和制得的陶瓷成品进行组装,在电极外加装连接线,得到成品的陶瓷电极。
3.根据权利要求2所述的一种传热速度快高绝缘的氮化硅陶瓷电极制备方法,其特征在于:所述S1中,氧化物烧结助剂为La2O3、Y2O3、SiO2三种氧化物的混合物。
4.根据权利要求2所述的一种传热速度快高绝缘的氮化硅陶瓷电极制备方法,其特征在于:所述S2中,球磨介质为无水乙醇。
5.根据权利要求2所述的一种传热速度快高绝缘的氮化硅陶瓷电极制备方法,其特征在于:所述S3中,胶结剂为聚乙烯醉缩丁醛胶结剂。
6.根据权利要求2所述的一种传热速度快高绝缘的氮化硅陶瓷电极制备方法,其特征在于:所述S5中液压机为四柱压机。
7.根据权利要求2所述的一种传热速度快高绝缘的氮化硅陶瓷电极制备方法,其特征在于:所述S6中烧结温度为2300~2400℃。
8.根据权利要求2所述的一种传热速度快高绝缘的氮化硅陶瓷电极制备方法,其特征在于:所述S6中成品相对密度为99.8%,弯曲强度为770-795MPa,热导率为85-90W/m·K。
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