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Compound amorphous seed added electrical porcelain and preparation method thereof

A technology of seed amorphous and electric porcelain, which is applied in the field of high-voltage electric porcelain, can solve problems such as poor process level, low strength, and uneven product quality, and achieve the effects of stable and mature process, simple preparation of raw materials, and increased elastic strain energy

Inactive Publication Date: 2015-07-29
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with similar foreign companies, most of the domestic companies have poor craftsmanship, resulting in uneven product quality
At present, the strength of domestic and ordinary porcelain is 60-80kN / cm 2 , the strength of high-strength porcelain is 100-180kN / cm 2 , 15%-25% lower than the strength of foreign porcelain bodies of the same type
Therefore, the insufficient strength of electric porcelain is the most prominent problem restricting domestic high-voltage electric porcelain

Method used

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  • Compound amorphous seed added electrical porcelain and preparation method thereof
  • Compound amorphous seed added electrical porcelain and preparation method thereof
  • Compound amorphous seed added electrical porcelain and preparation method thereof

Examples

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preparation example Construction

[0029] The preparation method comprises the following steps:

[0030] (1) Batching; raw materials are baked at 90~100°C for 12 hours, weighed according to the formula, and compounded;

[0031] (2) Ball milling: zirconium balls are used, the volume ratio of balls to materials is 2:1, and they are passed through a 270-mesh sieve;

[0032] (3) Iron removal, mud squeezing, staleness, and mud refining: Use electromagnetic coils and permanent magnet iron removal equipment to sieve and remove iron. After adding water to squeeze the mud, the moisture content is 22%, the aging time is 72h, and the vacuum degree is 0.05~0.09 Practicing mud under MPa;

[0033] (4) Molding: Extrusion molding is carried out under a vacuum degree of 0.01MPa, and the molded sample is a columnar shape with a diameter of 2.3cm and a length of 13.6cm;

[0034] (5) Drying; first dry in the shade for 12 hours, then bake at 90~100°C for 48 hours;

[0035] (6) Kiln sintering; the heating rate is 5°C / min, the sin...

Embodiment 1

[0038] Embodiment 1: Preparation and sintering of electric porcelain

[0039] According to the ratio of each component in Table 1, weigh a certain amount of raw materials (Puxian soil, Xiaxi soil, panning soil, lithium feldspar, Zhangzhou soil, coke gemstone, feldspar powder, bauxite, compound seed non crystal), and then follow the aforementioned ceramic preparation steps to carry out the processes of ball milling, iron removal, mud pressing, aging, mud refining, molding and drying in sequence. The dried samples were placed in a programmable furnace for sintering. Add 5% composite seed amorphous (2.5%CaB 2 o 4 seed amorphous and 2.5Ca 2 B 4 o 7 seed amorphous) sample fracture strength such as figure 1 As shown, the fracture strength of the sample at this time is low, only 1278±16MPa.

Embodiment 2

[0040] Embodiment 2: Preparation and sintering of electric porcelain

[0041] According to the ratio of each component in Table 1, weigh a certain amount of raw materials (Puxian soil, Xiaxi soil, panning soil, lithium feldspar, Zhangzhou soil, coke gemstone, feldspar powder, bauxite, compound seed non crystal), and then prepare electric porcelain according to the process of Example 1. Such as figure 1 As shown, add 15% composite seed amorphous (10%CaB 2 o 4 seed amorphous and 5% Ca 2 B 4 o 7 The fracture strength of the sample is 1401±11MPa.

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Abstract

The invention discloses compound amorphous seed added electrical porcelain and a preparation method thereof. The compound amorphous seed added electrical porcelain is prepared from the following raw materials in weight percent: 10-20% of SiO2, 10-25% of Al2O3, 10-20% of Fe2O3, 1-5% of TiO2, 2-10% of CaO, 0-3% of MgO, 5-15% of K2O, 3-8% of Na2O, and 5-20% of compound amorphous seeds. According to the compound amorphous seed added electrical porcelain and the preparation method thereof disclosed by the invention, the compound amorphous seeds (CaB2O4 amorphous seed and CaB4O7 amorphous seed) are added, so that the softening characteristic of the amorphous seeds can be exerted, and the sintering process of the electrical porcelain can be promoted; in the temperature raising process, the compound amorphous seeds can be converted into compound seed crystals (CaB2O4 seed crystal and CaB4O7 seed crystal), and the seed crystals are molten to form a liquid phase, so that the sintering process of the electrical porcelain can be further promoted, the density of the electric porcelain can be improved, and the breaking strength of the electrical porcelain is obviously enhanced; in addition, the addition of the compound amorphous seeds can effectively facilitate crystallization of mullite phase, and furthermore the mechanical strength of the electrical porcelain is obviously improved. The preparation method disclosed by the invention is simple and accessible in raw materials, stable and mature in process, and capable of meeting the requirements of practicability and industrialization.

Description

technical field [0001] The invention belongs to the field of high-voltage electric ceramics, and in particular relates to a composite seed amorphous (CaB 2 o 4 Seed amorphous and CaB 4 o 7 Seed amorphous) electric porcelain and its preparation method. Background technique [0002] High-voltage electric porcelain refers to electric porcelain products with a rated voltage higher than 1kV. It mainly refers to insulating ceramics used in high-voltage transmission lines, power stations and various electrical appliances, also known as insulators, and is an important part of the electric power industry. High-voltage electric porcelain is divided into silicon electric porcelain and aluminum electric porcelain according to the different chemical components contained in it. Aluminum electric porcelain is divided into aluminum porcelain and high-strength aluminum porcelain. According to the different application fields of electric porcelain, the electric porcelain involved in the p...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/10C04B35/622
Inventor 张腾刘鸿琳杜欣航李巍婷张琪颜佳佳魏颖唐电
Owner FUZHOU UNIV
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