1 What is glaze What does glaze do

The smooth and bright substance on the surface of porcelain is called glaze, and this is what we usually mean by glaze, glaze, and glaze. The glaze itself is a kind of silicate, which is made of quartz, feldspar and clay as raw materials, which is applied to the surface of the porcelain embryo after grinding, water modulation, and then firing at high temperature, and after the temperature drops, a thin layer of vitreous on the surface of the ceramic is formed.

The benefits of glaze are mainly to increase the durability, stability, dielectric strength (insulation properties) of porcelain and prevent the erosion of liquids and gases, that is to say, the best glaze can increase the integrity rate of porcelain, and it is not easy to crack during the high-temperature firing process, and at the same time it can also increase the beauty of porcelain, and the glass layer on the surface is convenient for daily maintenance and wiping.

As early as more than 3,000 years ago, the ancients had learned to use mud and rock to make glaze to decorate ceramics, and later the production workers used the kiln ash to naturally attach to the embryo body to form a glaze, and then made the plant ash as a raw material for glaze.

And the ceramics used in our modern life are mainly lime glaze and feldspar glaze.

Lime glaze is formulated with a natural mineral raw material similar to porcelain stone and calcium oxide; Feldspar glaze is mainly composed of quartz, feldspar, marble, kaolin, etc.

Adding metal oxides to lime glaze can become a variety of glaze colors, and Jingdezhen's color glazed porcelain is made by this principle.

Glaze is a thin layer of colorless or colored vitreous covering the surface of ceramic products, which is made of mineral raw materials (feldspar, quartz, talc, kaolin, etc.) and raw materials in a certain proportion (some raw materials can be made into frit first) after grinding to make glaze slurry, applied to the surface of the green body, and calcined at a certain temperature. It can increase the mechanical strength, thermal stability and dielectric strength of the product, as well as beautify the utensils, easy to wipe, and not be eroded by dust and filth.

There are many types of glaze, according to the type of body, there are porcelain glaze, pottery glaze and flint glaze; According to the firing temperature, it can be divided into high-temperature glaze and low-temperature glaze; According to the appearance characteristics, it can be divided into transparent glaze, opalescent glaze, color glaze, glossy glaze, matte glaze, crack glaze (open piece), crystalline glaze, etc.; According to the glaze composition, it can be divided into lime glaze, feldspar glaze, lead glaze, lead-free glaze, boron glaze, lead boron glaze, etc.

1. Tang Sancai, popular in Tang, is coated with white, green, brown and yellow glaze on the carcass of vegetarian burning, and baked at 1100 degrees kiln temperature. At that time, it was mostly used as funeral goods;

2. Glaze color, painted on the fired plain vessel, and then baked at low temperature, because the color is attached to the glaze, hence the name. It was first seen in the Song Dynasty;

3. Underglaze color, painted on the green billet, and then glazed at high temperature, the color pattern is under the glaze and will never fall off.

4. Red in the glaze, painted on the tire with copper oxide as the color agent, and safflower on a white background was fired at high temperature after glazing, which began in Jingdezhen in the Yuan Dynasty;

5. Doucai, on the body with blue and white to outline the outline of the pattern, glazed into ceramics, filled with a variety of colors in the contour line, and then fired by a low temperature furnace fire, the picture presents the underglaze blue and white and glaze color than the beauty of the fight, hence the name. Began in the Ming Chenghua period;

6. Open piece, both ice cracks, glaze cracks and ice cracks. Due to the different expansion coefficients of the glaze, the kiln is produced by cold air prematurely, which is the main feature of the Song Dynasty kiln;

7. Blue and white, one of the varieties of underglaze color, with cobalt oxide as the color agent, painted on the blank tire, covered with transparent glaze, fired at a high temperature of 1280-1320 degrees, blue and white, the main porcelain of the Ming and Qing dynasties;

8. Glaze color: decorate the porcelain with good glaze, and then fire it at high temperature, and the color material or glaze melts into the previous glaze, which seems to be in the middle, similar to the glaze color process, but different from the glaze color.

Real-world applications. The ceramics we use daily are generally dressed in a smooth and smooth clothes, especially for daily ceramics, and they are more particular about "clothes", some are as white as jade, and some are colorful and beautiful. This kind of clothing of ceramics is called "glaze".

The glaze in the Chinese character means that there is an oily luster, so the word "oil" is used to indicate the luster of the surface of the porcelain, but because the word "oil" represents food, it has been modified by later generations to take the "cai" that represents brilliance, and the "by" of the oil word is added to form the word "glaze".

1.What is glaze called? What does glaze do?

Glaze is a thin layer of colorless or colored vitreous that covers the surface of ceramic products, and is made with mineral raw materials (feldspar, quartz, talc, kaolin.

etc.) and raw materials in a certain proportion (some raw materials can be made into frit first) after grinding into glaze slurry, applied to the surface of the green body, calcined at a certain temperature.

1. Enhance the strength of ceramics, glaze makes ceramics increase mechanical strength, thermal stability, electrical strength and prevent the erosion of liquids and gases.

2. Dust-proof effect, glaze has the function of beautifying utensils, making ceramics easy to wash, not being stained by dust, etc., and the glaze can also be decorated with various decorations to enhance the artistic effect of products.

3. Extend the service life of ceramics, and the glaze will not be eroded by dust and filth. It is also used in ceramic tiles, mainly used in civil residences, hotels, hospitals, schools, laboratories and other places or parts that require stain resistance, corrosion resistance and cleaning resistance, such as bathrooms and toilets, which not only have a bright and clean feeling, but also protect ceramics and extend the service life; It is used for wall decoration in the kitchen, which is not only easy to clean, but also has a fireproof function.

Extended Information: As early as the Shang Dynasty more than 3,000 years ago, our ancestors learned to decorate ceramics with glazes made of rock and mud. Later, ceramic artists used the phenomenon that kiln ash naturally landed on the body to transform into a synthetic glaze, and then used plant ash.

As a raw material for glaze making.

The glazes used in the production of modern daily ceramics are divided into lime glaze and feldspar glaze. Lime glaze is made by using glaze fruit (a natural mineral raw material similar to porcelain stone) and two ash (the main ingredient calcium oxide.

Formulated, feldspar glaze raw materials are mainly composed of quartz, feldspar, marble, kaolin, etc. Metal oxides are added to lime glazes and feldspar glazes.

or infiltrate into other chemical ingredients, it will become a variety of glaze colors.

Glaze is a kind of silicate, the glaze applied on the ceramic is generally quartz, feldspar, clay as raw materials, after grinding, adding water modulation, coated on the surface of the body, after a certain temperature of roasting and melting, when the temperature drops, the formation of a thin layer of glass on the surface of the ceramic.

It enables ceramics to increase mechanical strength, thermal stability, dielectric strength and prevent the erosion of liquids and gases. The glaze also has the effect of increasing the beauty of porcelain and making it easy to wash and wipe, and not being stained by dust.

What are the materials of the glaze

1. All raw materials used in raw glaze glaze are not pre-selected and melted, and are directly mixed with water to make a pulp.

2. Frit glaze Before the glaze is pulped, part of the raw materials are melted into glass-like substances and quenched into small pieces (frit) with water, and then mixed with the rest of the raw materials and ball-ground into glaze slurry.

3. Salt glaze This glaze does not need to be prepared in advance, but when the product is calcined to high temperature, salt is put into the kiln, and the volatiles of salt form a thin layer of glass on the surface of the green body.

4. Soil glaze This glaze is a natural colored clay that is directly used as a glaze after washing.

5. Feldspar glaze This glaze is mainly composed of quartz, feldspar, lime, and clay, which is characterized by high hardness, strong luster, transparency, softness, and wide firing range.

6. Lime glaze This glaze is mainly made of calcium oxide as flux, and the number of molecules of calcium oxide should account for more than half, lime glaze has good elasticity and strong luster, and can also be fired into matte glaze and opalescent glaze, its disadvantage is that the firing range is narrow, and the product is easy to smoke.

7. Lead glaze This glaze part of the lead oxide as a flux, often used with boron oxide, strongly reduce the melting temperature of the glaze, the biggest advantage of lead and lead boron glaze is strong gloss, good elasticity, can be applied to a variety of green bodies, and can strengthen the color of the glaze, but considering the harm of lead poisoning, it should be used as little as possible.

The main component of the glaze is: silicate complex. Glaze is a thin layer of colorless or colored vitreous covering the surface of ceramic products, which is made of mineral raw materials (feldspar, quartz, talc, kaolin, etc.) and raw materials in a certain proportion (some raw materials can be made into frit first) after grinding to make glaze slurry, applied to the surface of the green body, and calcined at a certain temperature.

Glaze can increase the mechanical strength, thermal stability and dielectric strength of the product, as well as beautify the utensils, easy to wipe, not eroded by dust and filth. The glaze may be produced by calcium-containing stones and charcoal ash used in ancient stone cooking, or it may be inspired by the beautiful texture of the surface of shells, and consciously made of shell powder as raw materials. The glazes used in the production of modern daily ceramics are divided into lime glaze and feldspar glaze.

Lime glaze is prepared with glaze fruit (a natural mineral raw material similar to porcelain stone) and two ash (the main ingredient calcium oxide), feldspar glaze is mainly composed of quartz, feldspar, marble, kaolin, etc. Adding metal oxides to lime glaze and feldspar glaze, or infiltrating other chemical components, can produce a wide variety of glaze colors.

Glaze is a thin layer of colorless or colored vitreous covering the surface of ceramic products, which is made of mineral raw materials (feldspar, quartz, talc, kaolin, etc.) and raw materials in a certain proportion (some raw materials can be made into frit first) after grinding to make glaze slurry, applied to the surface of the green body, and calcined at a certain temperature.

It can increase the mechanical strength, thermal stability and dielectric strength of the product, and beautify the utensils, easy to wipe, and not be eroded by dust and filth.

Practical application: We use the ceramic branches in daily life, generally wear a smooth and smooth clothes, especially the daily ceramics, the "clothes" are more particular, some are as white as jade, some are colorful, very beautiful.

This kind of clothing of ceramics is called "glaze".

The glaze in the Chinese character means that there is an oily luster, so the word "oil" is used to indicate the luster of the surface of the porcelain, but because the word "oil" represents food, it has been modified by later generations to take the "cai" that represents brilliance, and the "by" of the oil word is added to form the word "glaze".