Richardson constant

URNurn:iso:std:iso:80000:-12:ed-2:en:item:12-26

https://metanorma.github.io/isq-smart/quantities/part-12/t12-26
urn:iso:std:iso:80000:-12:ed-2:en:item:12-26

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-12:ed-2:en:item:12-26

IEC

urn:iec:std:iec:80000-12:2019:::item:12-26

Designations

ENRichardson constant

FRfacteur de Richardson

Symbol

A

Notation systems

Rendered

A

AsciiMath

A

LaTeX

A

Definition

parameter in the expression for the thermionic emission current density $J$ (IEC 80000-6: Electromagnetism) for a metal in terms of the thermodynamic temperature $T$ (ISO 80000-5: Thermodynamics) and work function $ϕ$ , (work function):

J = A T^{2} exp (- \frac{ϕ}{k T})

where $k$ is the Boltzmann constant (ISO 80000-1)

paramètre dans l'expression de la densité de courant $J$ (IEC 80000-6: Electromagnetism) par émission thermoélectrique pour un métal en fonction de la température thermodynamique $T$ (ISO 80000-5: Thermodynamics) et du travail d'extraction $ϕ$ (work function) :

J = A T^{2} exp (- \frac{ϕ}{k T})

où $k$ est la constante de Boltzmann (ISO 80000-1)

A \cdot m^{- 2} \cdot K^{- 2}

Concept HierarchyPendrill (2024)

A physical quantity as defined in ISO/IEC 80000, with associated symbols, definitions, and units of measurement.

isq:t12-26

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	12-26
skosxl:prefLabel	"Richardson constant"@en
skosxl:altLabel	"A"@en
skos:definition	parameter in the expression for the thermionic emission current density stem:[J] (<<iec80000-6>>) for a metal in terms o…
isq:hasUnit	Am^(-2)K^(-2) (ampere per square metre kelvin squared)
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-12