タイトルまたは説明
1.Profile: Zirconia is the most important and potential material in
this time. Now it is widely applied in almost all field of
production. Zirconia is characterized by several properties which
are useful for industrial applications, including high strength,
high fracture toughness, excellent wear resistance, high hardness,
excellent chemical resistance, high toughness, good oxygen
conductivity and high refractories. Zirconia is a white crystalline
oxide of zirconium. Its most naturally occurring form, with a
monoclinic crystalline structure, is the rare mineral, baddeleyite.
Pure ZrO2 has a monoclinic crystal structure at room temperature
and transitions to tetragonal and cubic at increasing temperatures.
The volume expansion caused by the cubic to tetragonal to
monoclinic transformation induces very large stresses, and will
cause pure ZrO2 to crack upon cooling from high temperatures.
Several different oxides are added to zirconia to stabilize the
tetragonal and/or cubic phases: magnesium oxide (MgO), yttrium
oxide, (Y2O3), calcium oxide (CaO), and cerium oxide (Ce2O3),
amongst others. 2.Application: Unstabilized zirconia: suitable for
ceramic pigments, ceramics capacitors, PZT ceramics, or producing
other materials contained zirconia, etc. Partially stabilized
zirconia: produced by adding stabilizing oxides, usually Y2O3, MgO,
CaO or mixed oxides, Y2O3 stabilized zirconia permit excellent in
structural ceramics, and others are suitable used in high
temperature. Fully stabilized zirconia: construction of cubic
crystal, widely used in refractories, gemstone, sensors, etc
3.Specification and Composition: Grade Zr(Hf)O2 Na2O Fe2O3 SiO2
TiO2 Y2O3 InZ*1 >*9.5 <0.*2 <0.**8 <0.*4 <0.***5 /
InZ*2 >*9.9 <0.**5 <0.**1 <0.*1 <0.**5 / InZ*3
>*9.*9 <0.***5 <0.**1 <0.**5 <0.**8 / InZY*1
>*4.6 <0.*2 <0.*2 <0.*2 <0.*1 5.3 InZY*2 >*6.2
<0.*2 <0.*2 <0.*2 <0.***5 *3.7 4.Package: *5kg PVC bag
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YHTECH/ZP
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