CN110078526A - 一种火花塞绝缘体陶瓷及其制备方法和复合粘结剂 - Google Patents

一种火花塞绝缘体陶瓷及其制备方法和复合粘结剂 Download PDF

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CN110078526A
CN110078526A CN201910476679.4A CN201910476679A CN110078526A CN 110078526 A CN110078526 A CN 110078526A CN 201910476679 A CN201910476679 A CN 201910476679A CN 110078526 A CN110078526 A CN 110078526A
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陈龙
郑京
王伟强
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ZHUZHOU TORCH SPARK PLUG CO Ltd
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Abstract

本发明提出了一种火花塞绝缘体陶瓷用复合粘结剂，所述复合粘结剂采用聚乙烯醇、聚乙二醇、乳化石蜡、聚氧化乙烯中的二种到四种进行复配，所述复合粘结剂的加入总重量占陶瓷粉体重量的百分比为0.1%‑5.0%。本发明在于提供一种火花塞绝缘体陶瓷用复合粘结剂，在常规成型压力下，如40‑80MPa，即可获得高的陶瓷坯体密度和烧结体密度，制得火花塞绝缘体陶瓷机械强度和抗电性能优异，且具有良好的加工性能。

Description

一种火花塞绝缘体陶瓷及其制备方法和复合粘结剂
技术领域
本发明涉及火花塞技术领域，具体涉及一种火花塞绝缘体陶瓷及其制备方法和复合粘结剂。
背景技术
汽车发动机用火花塞需在高温、高压、高电压和腐蚀性气氛中工作，氧化铝陶瓷因其优良的耐热性、机械强度和抗电性能，成为火花塞绝缘体制造的首选材料。火花塞绝缘体机械强度和抗电性能与陶瓷体的致密度密切相关，陶瓷体致密度越高，则火花塞绝缘体机电性能越好。因此，火花塞绝缘体制造过程中，如何获得高的陶瓷坯体致密度，并最终获得高的陶瓷烧结体致密度，成为决定火花塞绝缘体性能的关键。
火花塞绝缘体陶瓷通常采用聚乙烯醇（PVA）作为粘结剂，以获得良好的加工性能，但采用PVA做粘结剂的陶瓷粉体颗粒硬，较难压实。为获得高的陶瓷坯体，通常的做法是提高压制设备的成型压力，如采用200MPa以上的超高压成型设备，以获得高的陶瓷坯体密度和烧结体密度。但超高压成型设备目前主要依赖进口，能耗高且生产效率低，毛坯后序很难磨削成型，且设备故障率高、维护成本高，很难实现批量化生产。
发明内容
为了解决上述的技术问题，本发明提供一种火花塞绝缘体陶瓷及其制备方法和复合粘结剂，其目的在于，提供一种复合粘结剂，在常规成型压力下，如40-80MPa，即可获得高的陶瓷坯体密度和烧结体密度，火花塞绝缘体机械强度和抗电性能优异，且具有良好的加工性能。
本发明提供一种火花塞绝缘体陶瓷用复合粘结剂，所述复合粘结剂采用聚乙烯醇（PVA）、聚乙二醇（PEG）、乳化石蜡（WAX）、聚氧化乙烯（PEO）中的二种到四种进行复配，所述复合粘结剂的加入总重量占陶瓷粉体重量的百分比为0.1%-5.0%。
作为本发明进一步的改进，所述复合粘结剂的加入总重量占陶瓷粉体重量的百分比为1.0-3.0%。
作为本发明进一步的改进，所述复合粘结剂包括聚乙烯醇和聚乙二醇，所述聚乙烯醇的加入量与聚乙二醇的加入量的重量比满足聚乙二醇(wt)/聚乙烯醇(wt)=0.1-10.0。
作为本发明进一步的改进，所述聚乙烯醇的加入量占陶瓷粉体重量百分比为0.01-2.0%。
作为本发明进一步的改进，所述聚乙二醇的加入量占陶瓷粉体重量百分比为0.01-4.0%。
作为本发明进一步的改进，所述乳化石蜡的加入量占陶瓷粉体重量百分比为0.01-5.0%。
作为本发明进一步的改进，所述聚氧化乙烯的加入量占陶瓷粉体重量百分比为0.01-5.0%。
本发明进一步保护一种火花塞绝缘体陶瓷的制备方法，向陶瓷粉体中加入一定重量比的上述的复合粘结剂，常规成型压力静压成型，制得火花塞绝缘体陶瓷。
本发明进一步保护一种上述方法制备的火花塞绝缘体陶瓷。
本发明具有如下有益效果：本发明在于提供一种火花塞绝缘体陶瓷用复合粘结剂，在常规成型压力下，如40-80MPa，即可获得高的陶瓷坯体密度和烧结体密度，制得火花塞绝缘体陶瓷机械强度和抗电性能优异，且具有良好的加工性能。
具体实施方式
下面将结合本发明实施例，对本发明实施例中的技术方案进行清楚、完整的描述，显然，所述的实施例只是本发明的部分具有代表性的实施例，而不是全部实施例，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其他所有实施例都属于本发明的保护范围。
实施例1
火花塞绝缘体陶瓷用复合粘结剂的配方：陶瓷粉体重量的百分比1.0wt%PVA+1.5wt%WAX。
向陶瓷粉体中加入上述的复合粘结剂，75MPa静压成型，制得火花塞绝缘体陶瓷。
实施例2
火花塞绝缘体陶瓷用复合粘结剂的配方：陶瓷粉体重量的百分比0.5wt%PVA+1.0wt%PEG+1.0wt%WAX。
向陶瓷粉体中加入上述的复合粘结剂，45MPa静压成型，制得火花塞绝缘体陶瓷。
实施例3
火花塞绝缘体陶瓷用复合粘结剂的配方：陶瓷粉体重量的百分比1.5wt%PEG+1.0wt%WAX。
向陶瓷粉体中加入上述的复合粘结剂，60MPa静压成型，制得火花塞绝缘体陶瓷。
实施例4
火花塞绝缘体陶瓷用复合粘结剂的配方：陶瓷粉体重量的百分比0.5wt%PVA +0.5wt%WAX+1.0wt%PEO。
向陶瓷粉体中加入上述的复合粘结剂，80MPa静压成型，制得火花塞绝缘体陶瓷。
实施例5
火花塞绝缘体陶瓷用复合粘结剂的配方：陶瓷粉体重量的百分比0.50wt%PVA+0.5wt%PEG+1.5wt%WAX+0.5wt%PEO。
向陶瓷粉体中加入上述的复合粘结剂，40MPa等静压成型，制得火花塞绝缘体陶瓷。
实施例6
火花塞绝缘体陶瓷用复合粘结剂的配方：陶瓷粉体重量的百分比0.5wt%PVA+2.5wt%PEG。
向陶瓷粉体中加入上述的复合粘结剂，50MPa静压成型，制得火花塞绝缘体陶瓷。
实施例7
火花塞绝缘体陶瓷用复合粘结剂的配方：陶瓷粉体重量的百分比1.0wt%PVA+1.5wt%PEG+0.5wt%WAX+0.5wt%PEO。
向陶瓷粉体中加入上述的复合粘结剂，70MPa静压成型，制得火花塞绝缘体陶瓷。
实施例8
火花塞绝缘体陶瓷用复合粘结剂的配方：陶瓷粉体重量的百分比0.5wt%PVA+0.5wt%PEG+1.0wt%WAX+1.0wt%PEO。
向陶瓷粉体中加入上述的复合粘结剂，55MPa静压成型，制得火花塞绝缘体陶瓷。
测试例1 性能测试
将本发明实施例1-8制备的火花塞绝缘体陶瓷与采用市售复合粘结剂制备火花塞绝缘体陶瓷进行性能测试，结果见表1。
表1
组别 等静压力 压实密度（g/cm<sup>3</sup>） 成型粘芯情况 成型磨削情况 瓷件密度(g/cm<sup>3</sup>) 抗弯强度（MPa） 抗电性能(KV/mm)
实施例1 75MPa 2.25 不粘芯 ★★★ 3.735 365 35.1
实施例2 45MPa 2.28 少量粘芯 ★★★ 3.740 370 36.0
实施例3 60MPa 2.30 少量粘芯 ★★ 3.745 373 36.4
实施例4 80MPa 2.29 少量粘芯 ★★ 3.740 368 35.8
实施例5 40MPa 2.27 少量粘芯 ★★ 3.735 360 35.5
实施例6 50MPa 2.29 不粘芯 ★★★ 3.725 355 34.0
实施例7 70MPa 2.33 少量粘芯 ★★★ 3.745 380 36.2
实施例8 55MPa 2.30 不粘芯 ★★ 3.730 357 35.6
市售 70MPa 2.28 严重粘芯 ★ 3.720 340 33.6
由上表可知，本发明复合粘结剂制得的火花塞绝缘体陶瓷与市售复合粘结剂制备火花塞绝缘体陶瓷相比，具有较高的陶瓷坯体密度和烧结体密度，制得火花塞绝缘体陶瓷机械强度和抗电性能优异，且具有良好的加工性能。
本领域的技术人员在不脱离权利要求书确定的本发明的精神和范围的条件下，还可以对以上内容进行各种各样的修改。因此本发明的范围并不仅限于以上的说明，而是由权利要求书的范围来确定的。

Claims (9)

1.一种火花塞绝缘体陶瓷用复合粘结剂，其特征在于，所述复合粘结剂采用聚乙烯醇、聚乙二醇、乳化石蜡、聚氧化乙烯中的二种到四种进行复配，所述复合粘结剂的加入总重量占陶瓷粉体重量的百分比为0.1-5.0%。
2.根据权利要求1所述一种火花塞绝缘体陶瓷用复合粘结剂，其特征在于，所述复合粘结剂的加入总重量占陶瓷粉体重量的百分比为1.0-3.0%。
3.根据权利要求1所述一种火花塞绝缘体陶瓷用复合粘结剂，其特征在于，所述复合粘结剂包括聚乙烯醇和聚乙二醇，所述聚乙烯醇的加入量与聚乙二醇的加入量的重量比满足聚乙二醇(wt)/聚乙烯醇(wt)=0.1-10.0。
4.根据权利要求1所述一种火花塞绝缘体陶瓷用复合粘结剂，其特征在于，所述聚乙烯醇的加入量占陶瓷粉体重量百分比为0.01-2.0%。
5.根据权利要求1所述一种火花塞绝缘体陶瓷用复合粘结剂，其特征在于，所述聚乙二醇的加入量占陶瓷粉体重量百分比为0.01-4.0%。
6.根据权利要求1所述一种火花塞绝缘体陶瓷用复合粘结剂，其特征在于，所述乳化石蜡的加入量占陶瓷粉体重量百分比为0.01-5.0%。
7.根据权利要求1所述一种火花塞绝缘体陶瓷用复合粘结剂，其特征在于，所述聚氧化乙烯的加入量占陶瓷粉体重量百分比为0.01-5.0%。
8.一种火花塞绝缘体陶瓷的制备方法，其特征在于，向陶瓷粉体中加入一定重量比的权利要求1-7任一项所述的复合粘结剂，常规成型压力等静压成型，制得火花塞绝缘体陶瓷。
9.一种根据权利要求8所述方法制备的火花塞绝缘体陶瓷。
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