Electric porcelain sintering method

An electric porcelain and stage technology, applied in the field of electric porcelain firing, can solve the problems of unsatisfactory and low gloss of electric porcelain glaze, and achieve the effect of increasing gloss.

Active Publication Date: 2009-05-27
CHINA XD ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using this traditional system, although its products can meet the electrical performance, mechanical performance and co

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] The electric porcelain firing method is specifically carried out according to the following steps:

[0031] (1) Small fire heating stage

[0032] The temperature in the kiln is increased from room temperature to 300°C, and the heating rate is 10°C / h;

[0033] (2) Oxidation and decomposition stage

[0034] This stage includes the rapid heating stage and the medium heat insulation stage, as follows:

[0035] 1) In the rapid heating stage, the temperature is increased from 300°C to 980°C, and the heating rate is maintained at 25°C / h;

[0036] 2) The temperature is increased from 980°C to 990°C during the medium heat holding stage. In this stage, the volume content of oxygen in the kiln is controlled at 8% while ensuring the temperature is stable;

[0037] (3) Reduction stage

[0038] When the temperature reaches above 990℃, it will enter the reduction stage. The period from 990℃ to 1130℃ is the strong reduction period. The strong reduction period takes 9-13 ...

Example Embodiment

[0050] Example 2

[0051] The specific electric porcelain firing method in this embodiment is as follows:

[0052] (1) Small fire heating stage

[0053] The temperature in the kiln is increased from room temperature to 300°C, and the heating rate is 15°C / h;

[0054] (2) Oxidation and decomposition stage

[0055] This stage includes the rapid heating stage and the medium heat insulation stage, as follows:

[0056] 1) In the rapid heating stage, the temperature is increased from 300°C to 980°C, and the heating rate is maintained at 45°C / h;

[0057] 2) The temperature is increased from 980°C to 990°C during the medium heat insulation stage. In this stage, the volume content of oxygen in the kiln is controlled at 12% while ensuring the temperature is stable;

[0058] (3) Reduction stage

[0059] When the temperature reaches above 990℃, it will enter the reduction stage. The period from 990℃ to 1130℃ is the strong reduction period. The strong reduction period takes 9-13 hours. The volu...

Example Embodiment

[0068] Example 3

[0069] The specific electric porcelain firing method in this embodiment is as follows:

[0070] (1) Small fire heating stage

[0071] The temperature in the kiln is raised from room temperature to 300°C, and the heating rate is 13°C / h;

[0072] (2) Oxidation and decomposition stage

[0073] This stage includes the rapid heating stage and the medium heat insulation stage, as follows:

[0074] 1) In the rapid heating stage, the temperature is increased from 300°C to 980°C, and the heating rate is maintained at 35°C / h;

[0075] 2) The temperature is increased from 980°C to 990°C in the medium heat holding stage. In this stage, the volume content of oxygen in the kiln is controlled at 10% while ensuring the temperature is stable;

[0076] (3) Reduction stage

[0077] When the temperature reaches above 990℃, it will enter the reduction stage. The period from 990℃ to 1130℃ is the strong reduction period. The strong reduction period takes 9-13 hours. The volume content...

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Abstract

The invention relates to a method for firing electric porcelain, which comprises the steps of low-flame temperature rise, oxygenolysis, reduction, high-flame heat preservation and cooling, and is characterized in that in a weak reduction period of the reduction step, and the volume content of oxygen in a kiln is controlled to be between 1 and 5 percent. Breaking away from an idea behind the prior method for firing electric porcelain that the kiln can not contain any free oxygen in the weak reduction period, the method for firing electric porcelain keeps an oxidizing atmosphere in the kiln for certain time by adjusting the flow of the air and fuel gases in the kiln in the weak reduction period when firing the electric porcelain. Thus, instead of yellowing, the glaze of products achieves increased gloss and turns a little red and bright.

Description

technical field [0001] The invention belongs to the field of electric porcelain production, in particular to an electric porcelain firing method. Background technique [0002] With the rapid development of China's economy and the increasingly fierce competition in the same industry, users have higher and higher requirements and expectations for product quality, which makes it difficult for the appearance quality of products produced by electric porcelain manufacturers to meet the requirements of users. The prerequisite for quality assurance Under the circumstances, improving the appearance quality of electric porcelain products and meeting the needs of users has become an important direction for future development. [0003] The firing system of electric porcelain is the requirement for the flame properties of different temperature sections in the firing curve, so as to successfully complete the firing tasks undertaken by each temperature section. The previous firing system ...

Claims

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Application Information

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IPC IPC(8): C04B35/64
Inventor 田宏王宜斌何鹏
Owner CHINA XD ELECTRIC CO LTD
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