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Manufacturing process of high-temperature resistant nixing pottery

A production process, a technology for making pottery, applied in clay products, applications, household appliances, etc., can solve the problems of large volume expansion, large thermal expansion coefficient, high thermal expansion coefficient of mullite, and achieve good mechanical strength, excellent heat resistance and rapid expansion. Transgender effect

Active Publication Date: 2016-12-21
广西古窑坭兴陶文化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

SiO in the blank of Nixing pottery 2 The content is as high as 67.7%, Al 2 o 3 The content is 18.14%, a part of SiO 2 with Al 2 o 3 The reaction produces mullite, which has a high thermal expansion coefficient; part of it becomes free quartz, which will undergo crystal transformation at high temperature, from quartz to cristobalite, and the expansion coefficient of cristobalite is much larger than that of quartz. Moreover, the conversion of quartz to cristobalite will produce a large volume expansion, which will lead to a large thermal expansion coefficient of Nixing pottery vessels, generally at 5×10 -6 / ℃ or above, it can only be used as daily-use ceramic utensils, such as conventional cups, saucers, teapots, vases, and cannot be used as cooking utensils under open flame conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1) Preparation of billets: 500kg of Dongni, 400kg of Xini, TiO 2 150kg and MgO 150kg, mixed evenly, after grinding, press filtration, vacuum mud refining, aging processes, to obtain the billet;

[0015] 2) Forming the green body: make the green body into 100 small vessel green bodies with outer diameter <170mm and capacity <1000ml;

[0016] 3) Drying of the green body: drying the green body;

[0017] 4) Green body firing: Put the dried green body into the kiln, raise the temperature to 250°C at a rate of 20°C per hour, and then stop the fire at 1050°C at a rate of 50°C per hour. After cooling out of the kiln.

[0018] Fill the Nixing pottery products one by one with water and put them directly into the gas stove for heating without cracking, and perform heat exchange at 400°C to 20°C one by one without cracking.

Embodiment 2

[0020] 1) Preparation of billet: 600kg of Dongni, 500kg of Xini, TiO 2 200kg and MgO 200kg, mixed evenly, after grinding, pressure filtration, vacuum mud refining, stale process, to get the billet;

[0021] 2) Body molding: make the body into 100 medium-sized vessel bodies with an outer diameter of 170-230mm and a capacity of 1000-2500ml;

[0022] 3) Drying of the green body: drying the green body;

[0023] 4) Green body firing: Put the dried green body into the kiln, raise the temperature to 350°C at a rate of 30°C per hour, and then stop the fire at a rate of 100°C per hour to 1150°C. After cooling out of the kiln.

[0024] The finished Nixing pottery utensils were filled with water one by one and put them directly into the gas stove for heating without cracking, and carried out heat exchange at 400°C to 20°C one by one without cracking.

Embodiment 3

[0026] 1) Preparation of blanks: 600kg of Dongni, 400kg of Xini, TiO 2 150kg and MgO 200kg, mixed evenly, after grinding, pressure filtration, vacuum mud refining, stale process, to obtain the billet;

[0027] 2) Forming the green body: make the green body into 100 large vessel green bodies with outer diameter>230mm and capacity>2500ml;

[0028] 3) Drying of the green body: drying the green body;

[0029] 4) Green body firing: put the dried green body into the kiln, raise the temperature to 300°C at a rate of 25°C per hour, and then stop the fire at a rate of 80°C per hour to 1100°C. After cooling out of the kiln.

[0030] The finished Nixing pottery utensils were filled with water one by one and placed directly on the gas stove for heating without cracking, and they were heat-exchanged at 350°C to 20°C one by one without cracking.

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Abstract

The invention discloses a manufacturing process of a high-temperature resistant nixing pottery. The manufacturing process comprises the steps of preparing a preform body, moulding, finishing, drying and calcining the preform body, and is characterized in that the preform body comprises the following materials in parts by weight: 5-6 parts of white mud, 4-5 parts of purple mud, 1.5-2 parts of TiO2, and 1.5-2 parts of MgO. A high-temperature resistant nixing pottery vessel prepared from the high-temperature resistant nixing pottery has the advantages of excellent spalling resistance and better mechanical strength, can be directly used on various heat sources, does not crack after being used for a long period of time, and meets the requirements of the fine ceramic cookware standard QB / T2580-2002.

Description

technical field [0001] The invention relates to a manufacturing process of Nixing pottery, in particular to a manufacturing process of high temperature resistant Nixing pottery Background technique [0002] Nixing pottery in Qinzhou, Zisha pottery in Yixing, Rongchang pottery in Sichuan and Jianshui pottery in Yunnan are also known as the four famous pottery in China. The production process of Nixing pottery includes blank preparation, blank molding, blank trimming, blank drying, blank decoration, blank firing and polishing. The raw materials used in Nixing pottery include Dongni and Xini. The Dongni is selected from the east of the Qinjiang River across the urban area of ​​Qinzhou City. It is a soft clay with a yellowish-white color and a small amount of quartz sand. It has good plasticity and is easy to shape. , but the refractoriness is quite low, and it is easy to deform when fired alone; Xini is the soil in the area west of Qinjiang River. It is a kind of purple mudsto...

Claims

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Application Information

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IPC IPC(8): C04B33/24C04B33/13C04B33/32
CPCC04B33/13C04B33/24C04B33/32C04B2235/3206C04B2235/3232C04B2235/3427C04B2235/3472C04B2235/3481
Inventor 刘缘靖刘缘智
Owner 广西古窑坭兴陶文化有限公司
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