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Zirconium dioxide. Ceramics made of zirconium dioxide
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- Zirconium dioxide
- Zirconium dioxide, stabilized by yttrium
- Zirconium dioxide, stabilized by yttrium
- Zirconium carbonate basic type
Ceramic products from completely stabilized zirconium dioxide
Ceramic products from partially stabilized zirconium dioxide
Zirconium dioxide - based powders
1. Zirconium dioxide
is a crystalline white or white with grey or white with yellow tint powder, can include lumps of sintered material which are easily milled.
Zirconium dioxide monoclinic is designed for manufacture of powder compositions, refractory ceramic materials, piezoceramics, metal ligatures (alloying elements) by reducing methods, etc.
Produced as per TU 95 2782-2001. Performance specifications are in accordance with the Table 1.
Table 1 - Zirconium dioxide TU 95 2782-2001
(Russian abbreviation for grades of zirconium dioxide - ДЦ)
| Designation of criterion | Rating for grades, % | ||||
| ДЦ1 | ДЦ2 | ДЦ3 | ДЦ4 | ДЦ5 | |
| Mass fraction of total amount of zirconium and hafnium dioxides, not less than | 99.3 | 98.8 | 98.0 | 95.8 | 94.0 |
| Mass fraction of silicon dioxide, not more than | 0.05 | 0.1 | 0.25 | 1.0 | 2.0 |
| Mass fraction of iron oxide, not more than | 0.03 | 0.06 | 0.08 | 0.3 | 0.5 |
| Mass fraction of titanium dioxide, not more than | 0.05 | 0.2 | 0.25 | 0.35 | - |
| Mass fraction of calcium oxide, not more than | 0.05 | 0.15 | 0.3 | 0.9 | 1.2 |
| Mass fraction of aluminium oxide, not more than | 0.03 | 0.05 | 0.07 | 0.1 | - |
| Mass fraction of magnesium oxide, not more than | 0.05 | 0.05 | 0.3 | - | - |
| Mass fraction of total amount of sodium and potassium oxides, not more than | 0.05 | 0.05 | 0.07 | 0.15 | - |
| Mass fraction of phosphorus oxide, not more than | 0.05 | 0.15 | - | - | - |
| Mass fraction of sulfur oxide, not more than | 0.3 | 0.3 | 0.5 | 0.9 | 0.9 |
| Mass fraction of loss during calcination, not more than | 0.5 | 0.5 | 0.6 | - | - |
2. Zirconium dioxide, stabilized by yttrium dioxide
is designed for the production of technical ceramics, thermo coating, etc. It is produced according to TU 344-2000. Performance specifications are in accordance with Table 2.
Table 2 - Zirconium dioxide, stabilized by yttrium oxide TU 344-2000
(Russian abbreviation for grades of zirconium dioxide, stabilized by Yttrium oxide - ДЦИ)
| Designation of criterion | Rating for grades, % | |||||
| ДЦИ1 | ДЦИ2 | ДЦИ3 | ДЦИ4 | ДЦИ5 | ДЦИ6 | |
| Mass fraction of total amount of zirconium and hafnium dioxides and yttrium oxide, not less than | 99.5 | 99.5 | 99.2 | 99.2 | 99.0 | 99.0 |
| Mass fraction of silicon dioxide, not more than | 0.05 | 0.05 | 0.15 | 0.15 | 0.3 | 0.3 |
| Mass fraction of iron oxide, not more than | 0.03 | 0.03 | 0.1 | 0.1 | 0.15 | 0.15 |
| Mass fraction of titanium dioxide, not more than | 0.01 | 0.01 | 0.1 | 0.1 | 0.25 | 0.25 |
| Mass fraction of calcium oxide, not more than | 0.03 | 0.03 | 0.05 | 0.05 | 0.3 | 0.3 |
| Mass fraction of aluminium oxide, not more than | 0.03 | 0.03 | 0.1 | 0.1 | 0.15 | 0.15 |
| Mass fraction of yttrium oxide | 4.0-6.0 | 15.0- 17.0 | 4.0-6.0 | 15.0- 17.0 | 4.0-6.0 | 15.0- 17.0 |
| Mass fraction of magnesium oxide, not more than | 0.02 | 0.02 | 0.03 | 0.03 | 0.2 | 0.2 |
| Mass fraction of total amount of sodium and potassium oxides, not more than | 0.01 | 0.02 | 0.05 | 0.05 | 0.1 | 0.1 |
| Mass fraction of sulfur oxide, not more than | 0.3 | 0.3 | 0.3 | 0.3 | 0.5 | 0.5 |
It is possible to use calcium oxide as a stabilizer on customer's request.
3. Powder for plasma-sprayed coating
Consumable part for application of zirconium dioxide coating
Table 3 - Zirconium dioxide for plasma-sprayed coatings as per TU 342-2000
| Designation of criterion | Rating for grades, % | ||
| ДЦ-100 | ДЦ-63 | ДЦ-40 | |
| Mass fraction of zirconium dioxide, not less than | 89.0 | 89.0 | 89.0 |
| Mass fractionof yttrium oxide | 9.0-10.0 | 9.0-10.0 | 9.0-10.0 |
| Mass fraction of hafnium dioxide, not more than | 0.3 | 0.3 | 0.3 |
| Mass fraction of iron oxide, not more than | 0.3 | 0.3 | 0.3 |
| Sieve residue with 01К mesh as per GOST 6613, not more than | 5 | Not available | Not available |
| Sieve residue with 0063К mesh as per GOST 6613, not more than | Rate is not set | 5 | Not available |
| Sieve residue with 004К mesh as per GOST 6613, not more than | 75, not less than | 75, not less than | 5, not more than |
4. Zirconium carbonate basic type
is designed for production of zirconium acetate and for other purposes. It is produced according to TU 335-97. Technical characteristics are according to Table 4.
Table 4 - Zirconium carbonate basic type TU 335-97
| Designation of criterion | Rating for grades, % | ||
| А | Б | В | |
| Mass fraction of total amount of zirconium and hafnium dioxide | 25-45 | 25-45 | 25-45 |
| Mass fraction of silicon dioxide, not more than | 0.05 | 0.3 | 1.0 |
| Mass fraction of iron oxide, not more than | 0.01 | 0.05 | 0.3 |
| Mass fraction of titanium dioxide, not more than | 0.01 | 0.2 | 0.5 |
| Mass fraction of calcium oxide, not more than | 0.03 | 0.3 | 0.8 |
| Mass fraction of total amount of sodium and potassium oxides, not more than | 0.05 | 0.1 | 0.5 |
| Mass fraction of ion sulfate, not more than | 0.2 | 0.2 | 1. |
Stabilized zirconium dioxide-based ceramic products
Basic PROCESS FLOWSHEET of production of zirconium dioxide-based ceramic products at CMP, JSC
|
Synthesis of the initial powder of different stabilization ↓ Fine grinding of powder in ball centrifugal mills ↓ Forming of products by method of:
↓ The high temperature annealing of products in an oxidizing environment |
|
Ceramic products made of fully stabilized zirconium dioxide
Ceramics made of fully stabilized zirconium dioxide at elevated temperatures possesses oxygen-ionic conductivity that is used in the sensors which determine oxygen in gas environments and molten substances, and in fabrication of high temperature solid oxide fuel cells for gas electrolyzers and electrochemical generators which serve as the independent sources of electric current.
Properties of ceramic products and fully stabilized zirconium dioxide:
- It is fully stabilized zirconium dioxide with yttrium oxide mass fraction (15-17) %;
- oxygen-ionic conductivity;
- cubic modification;
- density (5.7-5.8) g/cm3;
- gas tightness
The range of products produced at CMP, JSC on the basis of completely stabilized zirconium dioxide
Solid electrolytes of pellet-type:
- diameter 4 mm, wall thickness 0.5 mm, length 100 mm;
- diameter 4.5 mm, wall thickness 0.5 mm, length 120 mm;
- diameter 6 mm, wall thickness 0.5 mm, length 160 mm;
- diameter 8 mm, wall thickness 0.8 mm, length 150 mm;
- diameter 9.5 mm, wall thickness 0.7 mm, length 180 mm;
- diameter 10 mm, wall thickness 0.5 mm, length 160 mm;
- diameter 10 mm, wall thickness 0.8 mm, length 170 mm;
- diameter 13 mm, wall thickness 0.8 mm, length 160 mm.
Solid electrolytes of pellet-type:
- diameter (15-16) mm, height (5-25) mm.
Crucible products:
- Shape and dimensions upon agreement with the customer
It is possible to manufacture products from a completely stabilized zirconium dioxide of various configurations upon the agreement with the customer.
Ceramic products made of partially stabilized zirconium dioxide
Description of the products
Ceramics made of partially stabilized zirconium dioxide has high mechanical strength, hardness- and wear- resistance as well. Grinding bodies made of zirconium dioxide which is partially stabilized by yttrium oxide are used in clean mills of various types for fine grinding of materials in the chemical, pharmaceutical and food industry. Herewith contamination of milled product by the material of grinding media is practically eliminated.
Properties of ceramic products made of partially stabilized zirconium dioxide:
- partially stabilized zirconium dioxide with yttrium oxide mass fraction (4-6)%;
- tetragonal modification;
- density (6.0-6.1) g/cm3;
- bend strength (600-900) MPa;
- compression strength (2.6-3.2) GPa;
- hardness (12-13) GPa;
- high wear resistance.
The range of products on the basis of partially stabilized zirconium dioxide produced at CMP, JSC
Grinding (milling) media:
- distillation tube (diameter 48 mm, wall thickness 5 mm, length 200 mm);
- cone (upper diameter 90 mm, lower diameter 42 mm, wall thickness 4 mm, height 47 mm);
- bumper (impact) plate (diameter 92 mm, height 10 mm).
Nozzles for sand-blasting and shot-blasting cleaning:
shape and dimensions upon agreement with the customer.Grinding media of cylindrical shape:
diameter (5-16) mm, height (7-25) mm.It is possible to manufacture products from a completely stabilized zirconium dioxide of various configurations upon the agreement with the customer.