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GB1403950A - Method and apparatus for measuring thermal diffusivity - Google Patents

Method and apparatus for measuring thermal diffusivity

Info

Publication number
GB1403950A
GB1403950A GB3066673A GB3066673A GB1403950A GB 1403950 A GB1403950 A GB 1403950A GB 3066673 A GB3066673 A GB 3066673A GB 3066673 A GB3066673 A GB 3066673A GB 1403950 A GB1403950 A GB 1403950A
Authority
GB
United Kingdom
Prior art keywords
test sample
sample
pulse
thermal diffusivity
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3066673A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of GB1403950A publication Critical patent/GB1403950A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
    • G01N27/18—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

1403950 Determining thermal diffusivity COMMISSARIAT A L'ENERGIE ATOMIQUE 27 June 1973 [30 June 1972] 30666/73 Heading G1D Apparatus for determining the thermal diffusivity of a test sample comprises a calorimeter screen 1 in which the test sample E and a reference sample R are located, a control circuit 10 for maintaining the reference sample at a desired temperature, a control circuit 20 for maintaining one surface of the test sample E at the temperature of the reference sample and a further control circuit for maintaining the screen 1 at the temperature of the test sample surface, another surface of the test sample being connected to a pulse transmitter. As shown, the test sample E when at a steady temperature is supplied with an energy pulse Q by way of a heating resistor 3 and, to maintain the opposite faces of the test sample E at the steady value, power is withdrawn from the sample E by way of resistors 6, 6'. By timing the power withdrawal and measuring the maximum instantaneous value of power withdrawn, the thermal diffusivity can be calculated applying the following relation deduced from the Fourier law for the conditions at the imposed limits: e = the sample thickness, D = diffusivity, t = time, Q = the pulse value = ##P(t). The application of a Joule-effect pulse by an external generator can be replaced by an infrared radiation pulse generator.
GB3066673A 1972-06-30 1973-06-27 Method and apparatus for measuring thermal diffusivity Expired GB1403950A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7223795A FR2191738A5 (en) 1972-06-30 1972-06-30

Publications (1)

Publication Number Publication Date
GB1403950A true GB1403950A (en) 1975-08-28

Family

ID=9101170

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3066673A Expired GB1403950A (en) 1972-06-30 1973-06-27 Method and apparatus for measuring thermal diffusivity

Country Status (5)

Country Link
CH (1) CH574601A5 (en)
DE (1) DE2333271A1 (en)
FR (1) FR2191738A5 (en)
GB (1) GB1403950A (en)
IT (1) IT996575B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983003303A1 (en) * 1982-03-15 1983-09-29 Mauri Luukkala Procedure and means for examining the surface quality of materials in solid state
US4722610A (en) * 1986-03-07 1988-02-02 Technology For Energy Corporation Monitor for deposition on heat transfer surfaces
US5174654A (en) * 1992-03-18 1992-12-29 Droege Thomas F Heat exchanger efficiency monitor
US5248198A (en) * 1992-08-19 1993-09-28 Droege Thomas F Method and apparatus for evaluating heat exchanger efficiency
US5314247A (en) * 1993-04-16 1994-05-24 The United States Of America As Represented By The Administrator Of The National Aeronautics & Space Administration Dual active surface, miniature, plug-type heat flux gauge
WO1996021857A1 (en) * 1995-01-13 1996-07-18 Optikzentrum Nrw Gmbh Process and device for determining the layer thickness, the conductivity and/or the layer contact quality of layers deposited on substrates
CN112098462A (en) * 2020-10-20 2020-12-18 贵州电网有限责任公司 Paint layer thickness infrared thermal imaging detection device and detection method
WO2022061228A1 (en) * 2020-09-18 2022-03-24 Watlow Electric Manufacturing Company Systems and methods for detecting the presence of deposits in fluid flow conduits

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3981191A (en) * 1975-07-05 1976-09-21 Danfoss A/S Method and apparatus for the ultrasonic measurement of the flow velocity of fluent media
US5080495A (en) * 1989-08-30 1992-01-14 Mitsui Toatsu Chemicals, Inc. Method and apparatus for measuring thermal diffusivity by ac joule-heating

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983003303A1 (en) * 1982-03-15 1983-09-29 Mauri Luukkala Procedure and means for examining the surface quality of materials in solid state
US4551030A (en) * 1982-03-15 1985-11-05 Mauri Luukkala Procedure and means for examining the surface quality of materials in solid state
US4722610A (en) * 1986-03-07 1988-02-02 Technology For Energy Corporation Monitor for deposition on heat transfer surfaces
US5174654A (en) * 1992-03-18 1992-12-29 Droege Thomas F Heat exchanger efficiency monitor
US5248198A (en) * 1992-08-19 1993-09-28 Droege Thomas F Method and apparatus for evaluating heat exchanger efficiency
WO1994004904A1 (en) * 1992-08-19 1994-03-03 Nalco Chemical Company Evaluating heat exchanger efficiency
US5399017A (en) * 1992-08-19 1995-03-21 Droege; Thomas F. Method and apparatus for evaluating heat exchanger efficiency
US5314247A (en) * 1993-04-16 1994-05-24 The United States Of America As Represented By The Administrator Of The National Aeronautics & Space Administration Dual active surface, miniature, plug-type heat flux gauge
WO1996021857A1 (en) * 1995-01-13 1996-07-18 Optikzentrum Nrw Gmbh Process and device for determining the layer thickness, the conductivity and/or the layer contact quality of layers deposited on substrates
WO2022061228A1 (en) * 2020-09-18 2022-03-24 Watlow Electric Manufacturing Company Systems and methods for detecting the presence of deposits in fluid flow conduits
CN112098462A (en) * 2020-10-20 2020-12-18 贵州电网有限责任公司 Paint layer thickness infrared thermal imaging detection device and detection method
CN112098462B (en) * 2020-10-20 2022-07-12 贵州电网有限责任公司 Paint layer thickness infrared thermal imaging detection device and detection method

Also Published As

Publication number Publication date
DE2333271A1 (en) 1974-01-10
CH574601A5 (en) 1976-04-15
FR2191738A5 (en) 1974-02-01
IT996575B (en) 1975-12-10

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees