Iron Oxide Pigments For Ceramic 

Iron oxide red pigment is mainly introduced into ceramic pigment formula in the form of colorant. Such as brown series and black series in glaze pigment; zirconium iron oxide red pigment in zirconium series pigment; iron oxide red raw material is also widely used in black, coffee, brown series of billet pigment, as well as ceramic glazed tiles and other colorful cement bricks. Therefore, the dosage of iron oxide red pigment in ceramic pigment is very large, and the annual dosage is expected to be more than 10,000 tons. At present, the production methods of iron oxide red pigment used in ceramic pigment are mainly divided into sulfuric acid method and mixed acid method (nitric acid method). Take the thin iron plate as raw material, after processing, we get the red color bright iron oxide red pigment. Generally speaking, the comprehensive index of iron oxide red produced by nitric acid method is better than that of iron oxide red produced by sulfuric acid method.

1. What are the most common types of iron oxide red used in ceramics?
Iron oxide red 110, iron oxide red 130, iron oxide red 190 are the most popular, and iron oxide red 180, iron oxide red 120, iron oxide red 160, iron oxide red 140, iron oxide red 101 are also widely used in ceramics.
 2、How much iron oxide red is used in ceramics?
The sales volume in China market is more than 10,000.00kg.
 3、Which production process is better quality for iron oxide red applied in ceramics?
Currently, there are two production processes for synthesizing iron oxide red, sulfuric acid method and mixed acid method, which is also known as nitric acid method. The later ceramic quality is better than the first.
 4, iron oxide red coloring ceramics what colors?
Iron oxide red used as a ceramic coloring agent, is the formation of ceramic glaze brown series, black series, cobalt iron series glaze, ceramic billet composition of black, coffee, dark brown and other colors of the pigment. The brown series occupies an important position in the ceramic industry. The crystal structure of the brown series is Fe-Cr-Zn-Al and Fe-Cr-Zn, Fe III is red, and the combination with chromium oxide green is golden yellow to black brown.

1). Application of iron oxide red to black and coffee ceramic bodies.
(1) For black ceramic bodies
Ceramic wall tiles and floor tiles production of the main colors are black, yellow and coffee. Ceramic body color of black accounted for more than 35%, iron oxide red is the main raw material of ceramic body black formula, the content of 50-80%. Low-quality iron oxide red heat resistance is poor, only for low-quality black ceramic body.
(2) for coffee ceramic body
At present, the coffee ceramic body is made of chromite and iron oxide red mixed firing, 101, 110, 120 and other light yellow iron oxide red made of reddish-yellow ceramic body, while the blue iron oxide red to form a black coffee ceramic body, especially iron oxide. Red 180, as it is the darkest purple iron oxide red.
2) What is the best iron oxide red for brown ceramics?
Iron oxide red for brown ceramics is best for the appearance of bright red, deep purple tone of iron oxide red, especially the glaze with zirconium iron oxide red and porcelain body with coral red formulations, the use of mixed acid method of production of iron oxide red.
 
 5, in addition to iron oxide red, ceramics also use what pigments?
Underglaze pigments require more than 1300℃, which also makes the pigments have high stability, only some complex inorganic pigments can meet this heat resistance, such as cobalt blue (pigment blue 28, pigment blue 36), chrome black (pigment black) 30), chrome titanium (pigment brown 24), chromium oxide iron (pigment brown 29), zinc iron brown (pigment brown 33), cobalt green (pigment green 26, pigment green 50), nickel titanium yellow (pigment yellow 53), manganese titanium (pigment yellow 164). When used in glaze applications, the heat resistance is 600-800°C. There are many pigments that can reach this temperature. In addition to the above pigments, these pigments can be used, Cadmium Red (Pigment Red 108), Manganese Iron Black (Pigment Black 26), Copper Chromium Black (Pigment Black 28), and Zinc Ferric Acid Yellow (Pigment Yellow 119). When used in ceramic blanks, the pigment content is higher and the heat resistance requirements are lower. All of these pigments give ceramics with vibrant colors.