CN112408950A - 一种陶瓷绝缘件及其制备方法 - Google Patents
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Abstract
本发明公开了一种陶瓷绝缘件及其制备方法,陶瓷绝缘件包括里层和涂覆在所述里层表面的釉料,所述里层的配方包括氯化铝94~96%、粘土3~4%、金刚石1~2%,所述釉料的配方包括长石釉石英23~27%、长石33~37%、石灰27~29%、粘土11~13%;优点是电压的承受能力较好且硬度较高,可靠性较好。
Description
技术领域
本发明属于高压电缆配件技术领域,尤其是涉及一种陶瓷绝缘件及其制备方法。
背景技术
绝缘件是指在通常情况下不传导电流的物质,绝缘件的特点是分子中正负电荷束缚 得很紧,可以自由移动的带电粒子极少,其电阻率很大。绝缘件可分为气态(如氢、氧、氮)、液态(如纯水、油、漆、有机酸)和固态(如玻璃、陶瓷、橡胶、纸、石英)三类。 实际的绝缘件并不是完全不导电的,在强电场作用下,绝缘件内部的正负电荷将会挣脱 束缚,而成为自由电荷,绝缘性能遭到破坏,这种现象称为电介质的击穿。
以陶瓷绝缘件为例,市面上的陶瓷绝缘件通常由金刚石、黏土、沙土、少量氧化铝组成,由于过多的使用金刚石、黏土和沙土,上釉配比不够完善,造成陶瓷绝缘件硬度 较差,最高仅能承受6000V~12000V的电压,当电压达到15000V或20000V时,陶瓷绝 缘件会被击穿,且可能由于硬度不足的问题而发生爆裂,可靠性较差。
发明内容
本发明所要解决的技术问题是提供一种电压的承受能力较好且硬度较高的陶瓷绝 缘件及其制备方法,可靠性较好。
本发明解决上述技术问题所采用的技术方案为:一种陶瓷绝缘件,包括里层和涂覆 在所述里层表面的釉料,所述里层的配方包括氯化铝94~96%、粘土3~4%、金刚石1~2%,所述釉料的配方包括长石釉石英23~27%、长石33~37%、石灰27~29%、粘土11~13%。
作为优选,所述里层的配方包括氯化铝95%、粘土3.5%、金刚石1.5%。
作为优选,所述釉料的配方包括长石釉石英25%、长石35%、石灰28%、粘土12%。
一种陶瓷绝缘件的制备方法,包括以下步骤:
(1)准备里层原材料:氯化铝94~96%、粘土3~4%、金刚石1~2%,将各组分充分混合;
(2)注蜡:向里层原材料中注入白蜡;
(3)球磨:将里层原材料通过球磨机研磨成泥,球磨时间为25~35小时,里层原 材料的材质细度小于10μm;
(4)压铸:将研磨成泥的里层原材料倒入磨具内,压制形成里层坯体;
(5)排蜡:将坯体放入300~700℃内的窑炉内静置96~120小时,以排出70%以 上的白蜡;
(6)烧制:将窑炉加热至1300~1700℃,烧制42~60小时,残余的白蜡融化排出;
(7)冷却:停止加热,使炉内温度自然冷却至26~35℃,取出烧制完成的坯体;
(8)准备釉料原材料:长石釉石英23~27%、长石33~37%、石灰27~29%、粘土11~13%,将各组分充分混合,加入乳浊剂制成釉浆,釉料原材料与乳浊剂的配比为1:3;
(9)涂覆:将釉浆涂覆在烧制完成的坯体表面,涂覆厚度在0.9~1.2mm;
(10)二次烧制:将窑炉加热至1300~1400℃,烧制24~48小时;
(11)二次冷却:停止加热,使炉内温度自然冷却至室温,取出放凉。
作为优选,所述步骤(6)中将窑炉加热至1600~1700℃。
与现有技术相比,本发明的优点在于采用本里层和釉料的配方,先烧制里层制成坯 体,然后将釉料涂覆到该坯体上进行二次烧制,得到的陶瓷绝缘件能够承受最高30000V的电压,且有效提高结构硬度,可靠性较好。
具体实施方式
为了便于理解本发明,下面将对本发明进行更全面的描述,并给出了本发明的较佳 实施例。但是,本发明可以以许多不同的形式来实现,并不限于本文所描述的实施例。相反地,提供这些实施例的目的是使对本发明的公开内容的理解更加透彻全面。
除非另有定义,本文所使用的所有的技术和科学术语与属于本发明的技术领域的技 术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具 体的实施例的目的,不是旨在于限制本发明。
实施例一:一种陶瓷绝缘件,包括里层和涂覆在里层表面的釉料,里层的配方包括氯化铝94~96%、粘土3~4%、金刚石1~2%,釉料的配方包括长石釉石英23~27%、长 石33~37%、石灰27~29%、粘土11~13%。
实施例二:其余部分与实施例一相同,其不同之处在于里层的配方包括氯化铝95%、 粘土3.5%、金刚石1.5%;釉料的配方包括长石釉石英25%、长石35%、石灰28%、粘土 12%。
实施例三:其余部分与实施例一相同,其不同之处在于里层的配方包括氯化铝94%、 粘土4%、金刚石2%,釉料的配方包括长石釉石英23%、长石35%、石灰29%、粘土13%。
实施例四:其余部分与实施例一相同,其不同之处在于里层的配方包括氯化铝96%、 粘土3%、金刚石1%,釉料的配方包括长石釉石英26%、长石36%、石灰27%、粘土11%。
实施例五:一种陶瓷绝缘件的制备方法,包括以下步骤:
(1)准备里层原材料:采用如实施例一至实施例四中的一种里层的配方,将各组分充分混合;
(2)注蜡:向里层原材料中注入白蜡;
(3)球磨:将里层原材料通过球磨机研磨成泥,球磨时间为25~35小时,里层原 材料的材质细度小于10μm;
(4)压铸:将研磨成泥的里层原材料倒入磨具内,压制形成里层坯体;
(5)排蜡:将坯体放入300~700℃内的窑炉内静置96~120小时,以排出70%以 上的白蜡;
(6)烧制:将窑炉加热至1300~1700℃,烧制42~60小时,残余的白蜡融化排出;
(7)冷却:停止加热,使炉内温度自然冷却至26~35℃,取出烧制完成的坯体;
(8)准备釉料原材料:采用如实施例一至实施例四中的一种釉料的配方,将各组分充分混合,加入乳浊剂制成釉浆,釉料原材料与乳浊剂的配比为1:3;
(9)涂覆:将釉浆涂覆在烧制完成的坯体表面,涂覆厚度在0.9~1.2mm;
(10)二次烧制:将窑炉加热至1300~1400℃,烧制24~48小时;
(11)二次冷却:停止加热,使炉内温度自然冷却至室温,取出放凉。
实施例六:其余部分与实施例五相同,其不同之处在于步骤(3)中球磨时间为25小时。
本实施例中,步骤(5)中窑炉的温度设置在300~350℃,静置115~120小时。
本实施例中,步骤(6)中将窑炉加热至1300~1400℃,烧制55~60小时。
采用本实施例制备的坯体成品率在95%以上。
实施例七:其余部分与实施例五相同,其不同之处在于步骤(3)中球磨时间为30小时。
本实施例中,步骤(5)中窑炉的温度设置在500~550℃,静置103~108小时。
本实施例中,步骤(6)中将窑炉加热至1450~1550℃,烧制47~50小时。
采用本实施例制备的坯体成品率在97%以上。
实施例八:其余部分与实施例五相同,其不同之处在于步骤(3)中球磨时间为35小时。
本实施例中,步骤(5)中窑炉的温度设置在650~700℃,静置96~100小时。
本实施例中,步骤(6)中将窑炉加热至1600~1700℃,烧制42~45小时。
采用本实施例制备的坯体成品率在98%以上。
实施例九:其余部分与实施例五相同,其不同之处在于步骤(10)中将窑炉加热至1300℃,烧制24小时。
实施例十:其余部分与实施例五相同,其不同之处在于步骤(10)中将窑炉加热至1400℃,烧制24小时。
实施例十一:其余部分与实施例五相同,其不同之处在于步骤(10)中将窑炉加热至1200℃,烧制48小时。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不 能因此而理解为对发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的 保护范围。因此,本发明专利的保护范围应以所附权利要求为准。
Claims (5)
1.一种陶瓷绝缘件,其特征在于包括里层和涂覆在所述里层表面的釉料,所述里层的配方包括氯化铝94~96%、粘土3~4%、金刚石1~2%,所述釉料的配方包括长石釉石英23~27%、长石33~37%、石灰27~29%、粘土11~13%。
2.根据权利要求1所述的一种陶瓷绝缘件,其特征在于所述里层的配方包括氯化铝95%、粘土3.5%、金刚石1.5%。
3.根据权利要求1所述的一种陶瓷绝缘件,其特征在于所述釉料的配方包括长石釉石英25%、长石35%、石灰28%、粘土12%。
4.一种陶瓷绝缘件的制备方法,其特征在于包括以下步骤:
(1)准备里层原材料:氯化铝94~96%、粘土3~4%、金刚石1~2%,将各组分充分混合;
(2)注蜡:向里层原材料中注入白蜡;
(3)球磨:将里层原材料通过球磨机研磨成泥,球磨时间为25~35小时,里层原材料的材质细度小于10μm;
(4)压铸:将研磨成泥的里层原材料倒入磨具内,压制形成里层坯体;
(5)排蜡:将坯体放入300~700℃内的窑炉内静置96~120小时,以排出70%以上的白蜡;
(6)烧制:将窑炉加热至1300~1700℃,烧制42~60小时,残余的白蜡融化排出;
(7)冷却:停止加热,使炉内温度自然冷却至26~35℃,取出烧制完成的坯体;
(8)准备釉料原材料:长石釉石英23~27%、长石33~37%、石灰27~29%、粘土11~13%,将各组分充分混合,加入乳浊剂制成釉浆,釉料原材料与乳浊剂的配比为1:3;
(9)涂覆:将釉浆涂覆在烧制完成的坯体表面,涂覆厚度在0.9~1.2mm;
(10)二次烧制:将窑炉加热至1300~1400℃,烧制24~48小时;
(11)二次冷却:停止加热,使炉内温度自然冷却至室温,取出放凉。
5.根据权利要求4所述的一种陶瓷绝缘件的制备方法,其特征在于所述步骤(6)中将窑炉加热至1600~1700℃。
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