Zirconium dioxide CAS#1314-23-4
Zirconium dioxide CAS#1314-23-4
Zirconium dioxide CAS#1314-23-4
Zirconium dioxide CAS#1314-23-4

Zirconium dioxide CAS#1314-23-4

There are several types of zirconia: a pure(monoclinic) oxide and a stabilized (cubic)form, and a number of variations such asyttria- and magnesia-stabilized zirconia andnuclear grades. Stabilized zirconia has a highmelting point, about 2760°C, low thermal conductivity,and is generally unaffected by oxidizingand reducing atmospheres and mostchemicals. Yttria- and magnesia-stabilized zirconiasare widely used for equipment and vesselsin contact with liquid metals. Monoclinicnuclear zirconia is used for nuclear fuel elements,reactor hardware, and related applicationswhere high purity (99.7%) is needed.Zirconia has the distinction of being an electricalinsulator at low temperatures, graduallybecoming a conductor as temperaturesincrease.

Category:

Zirconium dioxide CAS#1314-23-4
Zirconium dioxide (ZrO2) as an abrasive is used to make grinding wheels and special sandpaper. It is also used in ceramic glazes, in enamels, and for lining furnaces and hightemperature molds. It resists corrosion at high temperatures, making it ideal for crucibles and other types of laboratory ware. ZrO2 is used as a “getter” to remove the last trace of air when producing vacuum tubes.
Heavy, white, amorphous powder. Mohs hardness 6.5, refr index 2.2. Insoluble in water and most acids or alkalies at room temperature; soluble in nitric acid and hot concentrated hydrochloric, hydrofluoric, and sulfuric acids. Most heat resistant of commercial refractories; dielectric.
Zirconium dioxide is a white, amorphous powder, insoluble in water but slightly soluble in acid.

Zirconium dioxide Chemical Properties
Melting point 2700 °C(lit.)
Boiling point 5000 °C(lit.)
density 5.89 g/mL at 25 °C(lit.)
Fp 5000°C
solubility insoluble
form powder
color White
Specific Gravity 5.89
PH 4-5
Resistivity 2.3 × 10*10 (ρ/μΩ.cm)
Water Solubility insoluble
Crystal Structure Monoclinic; Tetragonal; Cubic
Merck 14,10180
crystal system Monoclinic
Space group P21/c
Lattice constant
a/nm b/nm c/nm α/o β/o γ/o V/nm3
0.51505 0.52031 0.53154 90 99.194 90 0.1406
Dielectric constant 12.5（0.0℃）
Exposure limits ACGIH: TWA 5 mg/m3; STEL 10 mg/m3
NIOSH: IDLH 25 mg/m3; TWA 5 mg/m3; STEL 10 mg/m3
Stability: Stable.
InChIKey RVTZCBVAJQQJTK-UHFFFAOYSA-N
CAS DataBase Reference 1314-23-4(CAS DataBase Reference)
NIST Chemistry Reference Zirconium dioxide(1314-23-4)
EPA Substance Registry System Zirconium oxide (1314-23-4)
Safety Information
Hazard Codes Xi
Risk Statements 36/37/38
Safety Statements 26-36/37-39-36
HS Code 28256000

Related products