Aluminium oxide Al2O3, basic material serving in numerous applications for technical ceramic, good mechanical behaviour to high temperatures, good thermal conductivity, big electric resistivity, great hardness, good wear resistance, chemical slowness.
Wikipedia :Aluminium oxide is an amphoteric oxide with the chemical formula Al2O3. It is commonly referred to as alumina, or corundum in its crystalline form, as well as many other names, reflecting its widespread occurrence in nature and industry. Its most significant use is in the production of aluminium metal, although it is also used as an abrasive owing to its hardness and as a refractory material owing to its high melting point
More on Wikipedia
Suspension of mineral particles in a liquid. The solid particles can be colloidal or not and the liquid (water or organic solvent) behaves like an ionic solution which role is to maintain in dispersion grain to stop aggregate and sedimentation. It is the role of the deflocculant, which have to ensure time stability of the slurry.
Affinity of non-living material (ceramic) with living cellules.
Material designate for replacing some living tissues compatible with these ones and subjected to a prolonged or permanent contact with the organism.
Very fine tube, comparison with the thinness of a hair (etymological root of capillary, ” capillus ” the hair)
Linear thermal expansion coefficient
Proportional elongation, which happens when a material is heated to a range temperature of 1°K to the T temperature.
Density of heat flow divided by the temperature gradient.
External action on a material (traction, compression). This is the rapport F/S, force applied by unit of surface generally explained in MPa.
Mineral composed of natural silicate of magnesium, iron and aluminium, good thermal shock resistance, good thermal conductivity.
Suspension deposit on a non-porous support with a doctor blade. The drying of the band sprayed is done by evaporation of the organic solvent contained in the suspension.
Operation consisting in part shaping in filling a porous mold with a liquid paste called slurry. On contact at mold surface, the suspensive liquid suction leads to ceramic particles deposit, which thickness increase with time. In case of drain casting, the slurry is bleed in excess when the thickness is sufficient. In case of casting between two layers the filling mold is ensured by two slip taps, all the slurry is strengthen inside the mold to form a homogeneous paste.
Application of a pressure to the casting in a porous mold. The pressure gradient forces the fluid through le porous mold and through the layer in formation, which allow reducing drying time of the suspension compared to classical casting.
Center For Technology Transfers in Ceramics (Limoges, Fr.)
The main mission of the CTTC, Center For Technology Transfers in Ceramics, is to transform results of fundamental research into industrial products adapted to specific needs of each company.Specialized in technical ceramic fields, it allows companies of varied size and horizon (SMEs or major industry group) to have access to laboratory and pilot plat-form in order to realize idea, products and to develop industrial projects in all confidentiality.
Addition that modify environment of ceramic particles which belong to a slurry. Introduces in low quantity, it favorizes either the repulsive forces at the cost of attractive forces (Van Der Waals) or an steric chain in order to obtain a dispersion of ceramic particles in the liquid where they are put in suspension.
Shape difference before and after the application of a stress, adimensioned ( l/l : elongation/length).
Material reversible deformation. When forces are applied to the object, this one changes its form to come back to its initial form after the end of stress.
(Francais) Deformation plastique
Irreversible deformation of the material.
The notion of density allows to characterize the characteristic more or less heavy of a material compared to a reference one. The material reference is water for solids (1g/cm3).
Linear thermal expansion
Proportional elongation, which happens when a material is heated.
Device facilitating the evacuation of the losses dissipated by the semiconducting power elements. The devices are generally provided with fins, which should be fixed vertically to facilitate cooling by convection.