阅读说明：本技术 一种高强度瓷绝缘子及其制备方法 (High-strength porcelain insulator and preparation method thereof ) 是由 曾晨 于 2019-12-18 设计创作，主要内容包括：本发明公开了高强度瓷绝缘子及其制备方法,涉及电瓷技术领域,所述绝缘子由如下质量份数的原料制成：陶瓷粉10～30份、莫来石粉20～30份、钛白粉3～8份、高岭石5～10份、三氧化二镧1～3份、法库粘土1～5份、纳米二氧化钛1～5份、纳米硼酸铈2～8份；制备方法包括：S1、湿混；S2、干燥；S3、预烧；S4、球磨；S5、成型；S6、烧成。本发明的有益效果是本发明在传统制备工艺的基础上改变了瓷绝缘子原料的组分和配比,制得的瓷绝缘子相比于现有技术中的瓷绝缘子具有更加优良的抗拉强度和抗压强度,且保持了良好的绝缘性。(The invention discloses a high-strength porcelain insulator and a preparation method thereof, and relates to the technical field of electric porcelain, wherein the insulator is prepared from the following raw materials in parts by mass: 10-30 parts of ceramic powder, 20-30 parts of mullite powder, 3-8 parts of titanium dioxide, 5-10 parts of kaolinite, 1-3 parts of lanthanum oxide, 1-5 parts of Faku clay, 1-5 parts of nano titanium dioxide and 2-8 parts of nano cerium borate; the preparation method comprises the following steps: s1, wet mixing; s2, drying; s3, pre-burning; s4, ball milling; s5, molding; and S6, firing. The invention has the beneficial effects that the components and the proportion of the raw materials of the porcelain insulator are changed on the basis of the traditional preparation process, and compared with the porcelain insulator in the prior art, the prepared porcelain insulator has better tensile strength and compressive strength and keeps good insulativity.)

1. The utility model provides a high strength porcelain insulator which characterized in that: the insulator is prepared from the following raw materials in parts by weight: 10-30 parts of ceramic powder, 20-30 parts of mullite powder, 3-8 parts of titanium dioxide, 5-10 parts of kaolinite, 1-3 parts of lanthanum oxide, 1-5 parts of Faku clay, 1-5 parts of nano titanium dioxide and 2-8 parts of nano cerium borate.

2. The high-strength porcelain insulator according to claim 1, characterized in that: the insulator is prepared from the following raw materials in parts by weight: 15-25 parts of ceramic powder, 22-28 parts of mullite powder, 4-7 parts of titanium dioxide, 6-9 parts of kaolinite, 1.5-2.5 parts of lanthanum oxide, 2-4 parts of Fakuai clay, 2-4 parts of nano titanium dioxide and 3-7 parts of nano cerium borate.

3. The method for preparing a high-strength porcelain insulator according to any one of claims 1 to 2, characterized in that: the method comprises the following steps:

s1, wet mixing: putting the raw materials into a mixing machine for mixing uniformly to obtain a mixed material;

s2, drying: drying the uniformly mixed material by using a spray method to obtain a dried material;

s3, pre-burning: transferring the dried material to a porcelain oven for pre-sintering at the temperature of 1110-1150 ℃ to obtain a pre-sintered material;

s4, ball milling: adding the pre-sintered material into a ball mill for ball milling for 1-5 hours;

s5, molding: molding the pre-sintered object to obtain a blank;

s6, sintering: and (3) roasting the blank in three sections by using oxidizing flames, wherein the first section is subjected to heat preservation for 5-7 hours at the temperature of 420-500 ℃, the second section is subjected to heat preservation for 1-2 hours at the temperature of 980-1000 ℃, the third section is subjected to heat preservation for 5-7 hours at the temperature of 1150-1200 ℃, furnace cooling is carried out after roasting and sintering, and cementing is carried out, so that the high-strength porcelain insulator is obtained.

Technical Field

The invention relates to the technical field of electric porcelain, in particular to a high-strength porcelain insulator and a preparation method thereof.

Background

In the prior art, an insulator is a special insulating control and can play an important role in an overhead transmission line. It has been developed that one end of the high voltage wire connection tower is hung with a plurality of disc-shaped insulators, which are usually made of ceramics to increase the creepage distance. The insulator should not fail due to various electromechanical stresses caused by changes in environmental and electrical loading conditions, otherwise the insulator will not function significantly and will compromise the service and operational life of the entire line. Porcelain insulators play two basic roles in overhead transmission lines, namely supporting the conductor and preventing current from flowing back to ground. The porcelain insulator consists of an insulating porcelain body and metal accessories, wherein the surface of the insulating porcelain body is provided with a plurality of round umbrella skirts which are spaced and protruded. The raw materials of the insulating porcelain body are different in selection, the mechanical property and the electrical property are different, and the reasonable selection of the raw materials is an important guarantee for ensuring the product performance and the use safety. The products have various types and different formulas, and the quality of the products is guaranteed only when the products reach the standard.

Insulators are important parts of power systems. The insulator is made of organic polymer composite materials such as rubber and resin and the like, and has the advantages of relatively simple manufacturing process, relatively easy molding, high product quality reliability and the like compared with the traditional ceramic insulator. However, the organic polymer material itself has obvious disadvantages, such as poor temperature resistance and aging resistance. Typical organic insulating materials have a maximum service temperature of no more than 300 c and their service life is greatly compromised at higher temperatures. Along with the rise of the environmental temperature, the aging speed of the organic polymer material is accelerated, the service life is shortened, the problems of cracking, reduction of mechanical and electrical properties and the like are caused, the quality stability of the product is seriously influenced, and the requirement of novel high-speed power cannot be completely met.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art: a high-strength porcelain insulator and a manufacturing method thereof.

The technical solution of the invention is as follows:

the high-strength porcelain insulator is prepared from the following raw materials in parts by mass: 10-30 parts of ceramic powder, 20-30 parts of mullite powder, 3-8 parts of titanium dioxide, 5-10 parts of kaolinite, 1-3 parts of lanthanum oxide, 1-5 parts of Faku clay, 1-5 parts of nano titanium dioxide and 2-8 parts of nano cerium borate.

As a preferred technical scheme, the insulator is prepared from the following raw materials in parts by weight: 15-25 parts of ceramic powder, 22-28 parts of mullite powder, 4-7 parts of titanium dioxide, 6-9 parts of kaolinite, 1.5-2.5 parts of lanthanum oxide, 2-4 parts of Fakuai clay, 2-4 parts of nano titanium dioxide and 3-7 parts of nano cerium borate.

A preparation method of a high-strength porcelain insulator comprises the following steps:

s1, wet mixing: putting the raw materials into a mixing machine for mixing uniformly to obtain a mixed material;

s2, drying: drying the uniformly mixed material by using a spray method to obtain a dried material;

s3, pre-burning: transferring the dried material to a porcelain oven for pre-sintering at the temperature of 1110-1150 ℃ to obtain a pre-sintered material;

s4, ball milling: adding the pre-sintered material into a ball mill for ball milling for 1-5 hours;

s5, molding: molding the pre-sintered object to obtain a blank;

s6, sintering: and (3) roasting the blank in three sections by using oxidizing flames, wherein the first section is subjected to heat preservation for 5-7 hours at the temperature of 420-500 ℃, the second section is subjected to heat preservation for 1-2 hours at the temperature of 980-1000 ℃, the third section is subjected to heat preservation for 5-7 hours at the temperature of 1150-1200 ℃, furnace cooling is carried out after roasting and sintering, and cementing is carried out, so that the high-strength porcelain insulator is obtained.

The invention has the beneficial effects that: according to the invention, the components and the proportion of the raw materials of the porcelain insulator are changed on the basis of the traditional preparation process, and compared with the porcelain insulator in the prior art, the prepared porcelain insulator has better tensile strength and compressive strength, keeps good insulativity and is suitable for the erection and installation of an extra-high voltage transmission line.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.