The theoretical basis of zirconium-containing corundum brick

Zirconium-containing corundum brick Zirconia, zircon as raw material to produce corundum brick. Zirconia series products, zircon series products, zirconium mullite and zirconium corundum series of products belong to such products. According to the different production processes, zirconium-containing corundum brick is divided into sintered products, fused bricks and non-burning products. Zirconia-containing corundum brick has the characteristics of high melting point, low thermal conductivity and good chemical stability, and has good corrosion resistance to molten glass in particular.

The Zr-O system has several phases of oxygen in zirconium oxide and a non-stoichiometric oxide of the same melt. The stable compound of zirconium and oxygen is dioxide ZrO2. Zirconium dioxide has an ion radius ratio of 0.66, which is close to the limit of crystal coordination numbers 3 and 6. The zirconium cation is larger in size (0.082 nm) .In order to achieve the 8 coordination, oxygen ions are not as close as possible in the crystal lattice. Therefore, ZrO2 exhibits anomalous coordination. When its coordination number is equal to 7, one of the oxygen atoms occupies the space between two nodes of the AB crystal lattice. A lattice coordination and B lattice 4 coordination, High temperature by ions in the lattice node thermal motion occurs longer bond length is due to oxygen ions from the unit space transition to the A or B position knot preclude. Anion vacancies at the same time to achieve the 8 coordination.

The properties of Zr-bearing corundum bricks depend on the nature of ZrO2. Density and Stabilization The melting point of zirconia is 2677 ℃ and the temperature is 2500 ℃. The bulk density fluctuates 4.5 ~ 5.5g / cm3 due to the purity of the raw materials and the manufacturing method. The bulk density of compact zirconium corundum brick can reach 5.75g / cm3. Sintered zirconium corundum brick and liquid glass can not afford chemical reaction. Caustic solutions, carbonate solutions and acids (except concentrated H2SO4 and HF) do not react chemically with zirconia. ZrO2 has high structural strength and as a lining of the hot surface has the ability to work at 2200 ~ 2450 ℃ temperature.

Zirconia corundum brick high mechanical strength, and strength has been maintained to 1300 ~ 1500 ℃. The thermal conductivity of ZrO2 is much lower than the thermal conductivity of all other oxide materials. The use of ZrO2 this feature can be made of high temperature insulation layer.




Send product request

To: Zhengzhou Sunrise Refractory Co., Ltd.
Your E-mail:
Message text:


Send to other suppliers

Other supplier products

Refractory Brick Dense Zircon Block ZS-65 for the key parts of the furnace
Refractory Brick Dense Zircon Block ZS-65 for the key parts of the furnace Dense Zircon brick mainly used in upper area of flame space or frequent thermal shock region of alkali-free or low-alkali glass, sodium-calcium gla...
Common Silica Brick
Common Silica Brick Adopts high quality silica and advanced technology, our silica bricks enjoy the advantages of high purity, long service life, good thermal conducti...
Mullite Bricks
Mullite Bricks Description:Mullite brick IS characterized by good high temperature resistance and good thermal shock resistance, whick comes into being mullite th...
Big Fireclay Bottom Block
Big Fireclay Bottom Block Description:Using big vibrating table and adopting special castables, the company produces furnace large fireclay blocks with vibrate moulding tech...
Fused Cast High Zirconia Block TY-Z88 TY-Z95
Fused Cast High Zirconia Block TY-Z88 TY-Z95 Fused cast high zirconia bricks descriptionThe series of TY-Z are fused cast high zirconia refractories which are specially designed refractory for...
All supplier products

Same products

cannabisworldlifeconect
cannabisworldlifeconect Seller: cannabisworldlifeconect   We got top strains at good prices.moon rocks street price ,can dispensaries ship out of s...
cannabisworldlifeconect
cannabisworldlifeconect Seller: cannabisworldlifeconect
Star Wars Celebration Good Lanyards
Star Wars Celebration Good Lanyards Seller: GSJJ high quality lanyards Star Wars Celebration is the fan party devoted to the galaxy from far away. Lots of fans worldwid...
Bunny Boy Custom Lapel Pins
Bunny Boy Custom Lapel Pins Seller: GS-JJ.COM "Bunny Boy Custom Lapel Pins is the boys enamel pins of our latest couple lapel pins. The boy wea...
ZH-1100S Series Automatic High-speed One side box Gluing Folding Machine
ZH-1100S Series Automatic High-speed One side box Gluing Folding Machine Seller: ruian sanlin trade machinery Characteristics:   Main technical parameter: Model ZH-A1100PC ...