Porous

POROUS BODIES. This classification includes various compositions used for manufacturing elements with controlled porosity. Porous materials have very interesting properties such as low density, low thermal conductivity, low dielectric and high thermal shock resistance. These materials are suitable in several applications and across different industries: liquid filtering, honeycombs, catalyst supports, thermal insulators, porous burners… The chemistry composition and the distribution, shape and size of the pore are defined according to the application desired.

For more detailed info about the products corresponding to this family, technical and safety data sheet, please get in touch with VICAR.

Portfolio Categories:

Cerámicas Técnicas inglés 


Zircona

Zirconium dioxide (or zircona, ZrO₂), sometimes known as zirconia is a white crystalline oxide of zirconium. It crystallizes in monoclinic, tetragonal or cubic systems. Due to the fact the transformation to monoclinic structure brings a volumetric change, different cations are used to stabilize these crystalline structures, such as magnesium oxide (MgO), calcium oxide (CaO) or yttria oxide (Y₂O₃). There are two options when stabilizing it: totally (totally stabilized zirconia (TSZ) or partially stabilized zircona (PSZ). PSZ process is remarkable, because it prevents the tetragonal phase transformation to monoclinic phase. This is due to its “pre-tension” which leads to an increase of resistance and hardness. The zirconium oxide has achieved a high importance in the past years due to the following properties: extremely fracture resistance, high wear and corrosion resistance, thermal expansion similar to cast iron and low thermal conductivity.

Portfolio Categories:

Cerámicas Técnicas inglés 


Refractory – Crucibles

REFRACTORY BODIES and BODIES FOR CRUCIBLES. This generic name includes different materials used for the production of refractory elements, murals, sculptures, or any other applications that require high firing temperature. These compositions are usually made by mixing refractory clays and diverse chamotte (grog) qualities. The particle size of these bodies normally arrives to 3 mm, in order to help the resistance of the tensions caused by the gross thickness of the final parts or by the thermal shock. We also include in this section special bodies for the manufacturing of crucibles. They can be used for covering graphite crucibles or directly in foundry of precious metals.

Some of our standard products are CR-DENTAL-G20-PO, CR14T-PO, CR14-PO. See our Technical Ceramics catalogue and don’t hesitate to contact us for more information (Technical Data Sheets) or for any new development you may need.

Portfolio Categories:

Cerámicas Técnicas inglés 


Alumina

The Group C700 is made up of compositions with high content of alumina (Al₂O₃). Sub-groups classification (C780, C786, C795 and C799) depend on the alumina content at the composition. Sub-group C780 has a percentage of alumina content between 80-86%; C786 a percentage of 86-95% alumina content; C795 compositions have between 96-99% alumina content, and finally sub-group C799 has an alumina content percentage higher than 99%. Alumina ceramic is the most mature of the engineering ceramics, and it has excellent properties, such as high strength and hardness, high resistance to corrosion, high thermal conductivity, excellent insulation properties, high toughness and high-temperature strength. The applications of this material are many: electrical engineering, electronics, mechanical and plant engineering, chemical and processing technology, medical technology…

Some of our standard products are ALU-8601P-AT, ALU-86R5P-AT, ALU-9201P-AT, ALU-9601P-AT. See our Technical Ceramics catalogue and don’t hesitate to contact us for more information (Technical Data Sheets) or any new development you may need

Portfolio Categories:

Cerámicas Técnicas inglés 


Mullites

Group C600 includes compositions with high content of mullite (3Al₂O₃.2SiO₂). It comprises sub-groups C610 and C620, depending on the alumina content. C610 compositions have between 50-65% of alumina content, and C620 compositions have between 65-80% of alumina content. The microstructure of this material is composed of mullite, corundum and a vitreous phase with low porosity levels. Mullites are dense materials with excellent properties: high strength, low thermal expansion, high resistance to corrosion and high resistance to creep at high temperatures. Applications include thermocouple protection tubes, carrying rollers for high temperature, molten metal handling, roller kilns, refractory parts for foundry… Nowadays VICAR has materials according the norm C610 and C620; besides it’s also possible to develop new products according to customer requirements.

Some of our standard products are MUL-6202X-AT, MIL-6212P-AT, REF-FRAME1450-PO. See our Technical Ceramics catalogue and don’t hesitate to contact us for more information (Technical Data Sheets) or any new development you may need

Portfolio Categories:

Cerámicas Técnicas inglés 


Cordierite Dense and Porous

DENSE CORDIERITES. This group includes dense cordierite, either alkaline earth or zircon based. Cordierite C410 is often found in insulating applications, heating cartridges or electrical engineering. The group C500 includes the aluminosilicate magnesium materials. The most important crystalline phase in these compositions is cordierite (2MgO.2Al₂O₃.5MgO), and the most important property is its low thermal expansion coefficient and its good mechanical resistance. Some examples of applications are the following: insulators for continuous flow electric water heaters, heating element pipes, heating element supports in furnaces, link heaters, heating cartridges for soldering irons, gas heater inserts, spark protectors and catalyst carriers in car industry.

POROUS CORDIERITES. In the past years, cordierite-based porous ceramics have become more and more important, as light structural materials, thermal insulating or catalyst supports, among other examples. This group includes the sub-groups C510, C511 and C512, which are compositions with different cordierite and porosity contents. C520 compositions have higher cordierite content and less porosity. C530 compositions have some mullite percentage due to its higher alumina content. Cordierite materials behave inertly towards heating element alloys at temperatures up to 1,000°C or even at 1,200°C (there is no reaction between the heating element and the ceramic). For this reason, cordierites are often found in electric heating applications. Some examples of current applications are: flow electric water heaters, heating element pipes, heating element supports in furnaces, link heaters, heating cartridges for soldering irons, gas heater inserts, spark protectors catalyst carriers in car industry and so on.

Some of our standard cordierite products are: COR-22-AT, COR-NEX-AT, COR-CANDEL-AT, COR-MUL-PO. See our Technical Ceramics catalogue and don’t hesitate to contact us for more information (Technical Data Sheets) or any new development you may need

Portfolio Categories:

Cerámicas Técnicas inglés 


Alumina Titanate

The main characteristic of Alumina Titanate is its exceptional resistance to thermal shock. It is a perfect composition for those products that require a good thermal shock resistance, low conductivity and low moisture. Besides, they are chemically inert. Titanates are mainly used in aluminium foundries because of non wettability with molten metals.

Some of our standard products are ALTI-5P-AT, ALTI-5X-AT. See our Technical Ceramics catalogue and don’t hesitate to contact us for more information (Technical Data Sheets) or any new development you may need.

Portfolio Categories:

Cerámicas Técnicas inglés 


Steatites

Steatite is a ceramic material composed by natural raw materials, mainly soapstone (magnesium silicate), clay, feldspar or barium carbonates as fluxes. Steatite has excellent dielectric properties, and it has been used for years in electrical engineering, electronic and heat engineering. Some examples of applications are: sockets, control housings, insulating beads, low-voltage power fuses and base plates. Steatites belong to magnesium silicates group (C200 group). The type of flux affects the electrical characteristics and leads to the following differentiation: steatite for low-frequency (C210), normal steatite (C220), and special steatite with “low loss factor” (C221).

Some of our standard products are ST-3D-AT, ST-EX3-AT, ST-V4-AT, ST-FUN-AT. See our Technical Ceramics catalogue and don’t hesitate to contact us for more information (Technical Data Sheets) or for any new development you may need

Portfolio Categories:

Cerámicas Técnicas inglés 


Electroporcelains

The Group C100 is composed by porcelains with different alumina content. Siliceous porcelains (Sub-groups C110, C111 and C112) apply in low voltage areas. Porcelains with improved electrical, mechanical and thermal properties are produced by exchanging quartz (SiO₂) for alumina (Al₂O₃). The outstanding properties of aluminous porcelains are: very high strength even under permanent thermal load, and favourable long-term behaviour in outdoor conditions. Aluminous porcelain is mostly used for outdoor post insulator. Nowadays VICAR has materials according the norm C110, C111, C120 and C130. Besides, we can develop new products according to customer specifications.

Some of our standard products are EPOR-MIX-AT, EPOR-LTR-AT and EPOR-DUR-AT. See our Technical Ceramics catalogue and don’t hesitate to contact us for more information (Technical Data Sheets) or any new development you may need.

Portfolio Categories:

Cerámicas Técnicas inglés