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GREEN CERAMIC [6 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2014-12-12

English

Subject field(s)
  • Ceramics (Industries)
CONT

Ceramic processing.... In general, the ceramic raw materials in the form of powder are mixed with the required additives... Four techniques are [then] normally used for shaping the ceramic.... After forming... the densification of the green products is done by sintering....

French

Domaine(s)
  • Céramique (Industries)
CONT

Si certains modes de fabrication des céramiques traditionnelles sont adaptables aux néo-céramiques, les compositions de ces dernières présentent, en règle générale, des caractéristiques qui conditionnent étroitement la mode de mise en œuvre [...]

Spanish

Save record 1

Record 2 2011-08-26

English

Subject field(s)
  • Chemical Elements and Compounds
Universal entry(ies)
Ba(NO3)2
formula, see observation
10022-31-8
CAS number
DEF

A chemical compound which appears in the form of lustrous, white crystals which is soluble in water, insoluble in alcohol, is obtained by the action of nitric acid on barium carbonate or sulfide, is a strong oxidizing agent and which is used in pyrotechnics(where it gives green light), incendiaries, chemicals(barium peroxide), ceramic glazes, electronics and as a rodenticide.

OBS

Chemical formula: Ba(NO3)2

French

Domaine(s)
  • Éléments et composés chimiques
Entrée(s) universelle(s)
Ba(NO3)2
formula, see observation
10022-31-8
CAS number
OBS

Formule chimique : Ba(NO3)2

Spanish

Save record 2

Record 3 2011-06-15

English

Subject field(s)
  • Weather Stations and Meteorological Instruments and Equipment
CONT

The Bellani plate [used to measure evaporation] consists of a thin, porous, black ceramic disk, 7.5 cm in diameter, fused to the large end of a glazed, ceramic funnel. Water is conducted through the lower open end of the funnel from a burette which acts as a reservoir and a measuring device.

CONT

Use of Bellani plate evaporimeters for estimation of PET [potential evapotranspiration].

OBS

Evaporimeter(atmometer) An evaporimeter consists of a flat, porous ceramic disk(Bellani plate) in which water is drawn up by capillary action as water is evaporated from the disk. It is used to directly estimate crop evapotranspiration rate. Several commercial models can be easily installed near the edge of a field or on a roadway in a field.(The unit must be located far enough into the field to avoid field boundary effects.) One commercial model provides a green canvas-like material covering the ceramic disc to simulate crop leaf color. Reasonably good correlation has been found between field measurements and that calculated from Penman-type equations. Small difference in evaporation rates may be found between individual meters. Maintaining water levels and removal for freeze protection are necessary.

Key term(s)
  • Bellani plate evaporometer
  • Bellani evaporimeter
  • Bellani evaporometer
  • Bellani plate evaporometre
  • Bellani plate evaporimetre
  • Bellani evaporimetre
  • Bellani evaporometre
  • Bellani atmometre
  • Bellani atmidometer
  • Bellani atmidometre
  • Bellani plate atmometre

French

Domaine(s)
  • Stations, instruments et équipements météorologiques
DEF

Appareil de mesure de l'eau évaporée, dont le capteur est un disque de porcelaine noircie, d'environ 7,5 centimètres de diamètre et quelques millimètres d'épaisseur, placé horizontalement au sommet d'une cheminée en verre alimentée en eau, sous pression, par un réservoir gradué qui permet la mesure de l'évaporation.

CONT

Il est très difficile de mesurer l'évaporation dans la nature, ou plus exactement l'évapotranspiration, puisqu'il faut tenir compte de la transpiration des plantes. [...] Suivant les pays et les besoins, la mesure est faite avec des dispositifs différents. Citons le bac à évaporation du bureau météorologique des États-Unis [...] le lysimètre, [...] l'évaporomètre Piche, employé en France surtout, [...]; enfin l'atmomètre de Bellani, utilisé dans les stations agricoles du Canada, petite assiette poreuse noire, maintenue humide et placée à quatre pieds au-dessus du sol.

CONT

La plaque de Bellani [utilisée pour mesurer l'évaporation] consiste en un disque de céramique [...] qui est joint à la grande ouverture d'un entonnoir de céramique vitrifié. L'eau est amenée à l'ouverture inférieur de l'entonnoir au moyen d'une burette qui sert en même temps de réservoir et d'appareil de mesure.

Spanish

Save record 3

Record 4 2010-05-12

English

Subject field(s)
  • Strength of Materials
  • Refractory Materials (Metallurgy)
DEF

The mechanical strength of a ceramic product in the green state.

OBS

According to McGraw-Hill (Clay, commercial), green strength of the clay material is the wet, plastic state "while dry strength is the strength of the clay after it has been dried." However, the research officer consulted said that green strength is the commonly-used term for strength of the material before firing.

OBS

Test report on brick-making materials, 1976.

OBS

green strength: term recommended by ISO.

French

Domaine(s)
  • Résistance des matériaux
  • Matériaux réfractaires (Métallurgie)
DEF

Résistance mécanique d'un produit céramique à l'état vert.

OBS

résistance en vert : terme recommandé par l'ISO.

Spanish

Save record 4

Record 5 1989-07-30

English

Subject field(s)
  • Clay Working Methods (Ceramics)
CONT

Pressure sintered silicon nitride (PSSN) is produced from silicon nitride powder. The powder is shaped to the green body by any of the forming techniques.

OBS

In general, the ceramic raw materials in the form of powders are mixed with the required additives.... After forming, the articles are dried to obtain "green" products;.... The densification of the green products is done by "sintering", i. e. by heat treatment....

French

Domaine(s)
  • Techniques de la céramique
CONT

Le frittage s'accompagne d'une densification et d'une diminution de la porosité, ce qui entraîne un retrait linéique compris entre 10 et 20%. Il est essentiel de connaître le retrait, puisque les dimensions de l'ébauche crue devront excéder d'autant celles de l'objet fini.

OBS

cru : comprimé et non fritté.

Spanish

Save record 5

Record 6 1989-07-30

English

Subject field(s)
  • Industrial Techniques and Processes
  • Industrial Ceramics
CONT

Ceramic processing.... The densification of the green products is done by "sintering", i. e., by heat treatment at higher temperatures... The heat treatment conditions, such as sintering temperature, rates of heating and cooling and sintering times depend upon the chemical composition of the materials as well as the microstructure required.

French

Domaine(s)
  • Techniques industrielles
  • Céramiques industrielles
CONT

La diffusivité thermique des matériaux céramiques étant basse, il se forme en cours de cuisson d'une pièce des gradients de température d'autant plus élevés que le volume des pièces est plus grand et/ou que la vitesse d'élévation de température est plus rapide.

Spanish

Save record 6

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