Ceramic Grade Zinc Oxide Powder supplier and manufacturer - China factory

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Ceramic Grade Zinc Oxide Powder

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Zinc oxide, also known as zinc white, is an important chemical flux material for ceramics. Ceramic grade zinc oxide powder is widely used in brick and tile glazes and translucent glazes for stoneware, as well as transparent glazes after cooking for tableware. Especially in building ceramic wall and floor tile glaze and low-temperature porcelain glaze are used in large amounts.

Ceramic Grade Zinc Oxide Powder factory

Ceramic grade zinc oxide powder has a strong fluxing effect in glaze, which can reduce the expansion coefficient of glaze, increase the thermal stability of the product, and at the same time increase the gloss and whiteness of the glaze, improve The elasticity of the glaze. While expanding the melting range, it can also increase the glaze of the glaze.

Production Basic Data Of Ceramic Grade Zinc Oxide Powder:

Product name	Zinc oxide	Molecular formula	ZnO
CAS NO	1314-13-2	EINECS NO	215-222-5
Density	5.606g/cm3	Molecular weight	81.38
Melting point	1975℃	Boiling Point:	2360ºC
Purity	0.99	Active substance content	0.997
Appearance	White powder or crystal	H.S CODE	2817001000

The Role of Ceramic Grade Zinc Oxide Powder In Ceramics:

1、Used as flux: When ceramic grade zinc oxide powder is used as flux in low-temperature frit glaze, the general dosage is between 5% and 10%, and the dosage in low-temperature raw glaze is generally about 5%.

2、Used as an opacifier: Ceramic grade zinc oxide powder added to glaze rich in Al2O3 can improve the opacity of glaze

3、Used as a crystallizer: In artistic glaze crystallized glaze, zinc oxide is an indispensable crystallizer. When the glaze is cooled rapidly, it will form a larger crystal pattern, which is very beautiful. In crystal glaze, the amount of zinc oxide is as high as 20-30%.

4、Used to make cobalt sky blue glaze: Ceramic grade zinc oxide powder is a very important flux in cobalt sky blue glaze. It can make cobalt oxide form beautiful sky blue in glaze.

5、Used as ceramic pigment: Due to its strong fluxing effect, zinc oxide can be used as a flux, mineralizer and glaze carrier for ceramic pigments.

Standard:《GB/T3185-2016》
Item	Type1	Type2	Type3
Zinc oxide（Zn0 calculating as dry materia)% ≥	99.7	99.7	99.5
Metal content（as Zn)% ≤	none	none	0.008
Insoluble Matter in Hci % ≤	0.006	0.008	0.03
Loss on ignition % ≤	0.2	0.2	0.25
Residue on sieve (45um)% ≤	0.1	0.15	0.2
Water soluble matter % ≤	0.1	0.1	0.15
Volatile matter in 105℃ % ≤	0.3	0.4	0.5
Lead(pb）% ≤	0.008	0.05	0.1
Copper(Cu)% ≤	0.0002	0.0004	0.0007
Manganese（ Mn）%	0.0001	0.0001	0.0003
Cadmium (Cd）%	0.002	0.005	0.01
Iron (Fe）%	0.005	0.01	—
Specific surface area（m2/g)	agree		—
Oil absorption */g/100g	agree
Color* (compared with standard sample)	agree
Decoloration power*(compared with standard sample)≥	agree

Ceramic Grade Zinc Oxide Powder factory

The use of zinc oxide in ceramics should pay attention to the following points:

1. Before use, it must be calcined at high temperature, the calcination temperature is about 1200 ℃. If directly added to the raw glaze without calcination, it will affect the process performance of the glaze. No calcination is required when adding frit.

2. Excessive amount of zinc oxide in the glaze will affect the glaze gloss.

3. Zinc oxide has a bad influence on some colored glazes, especially chrome glazes.

Ceramic Grade Zinc Oxide Powder factory