GB1391121A - Apparatus for investigating phase transformations and reactions in substances under quasi-isothermal conditions - Google Patents

Apparatus for investigating phase transformations and reactions in substances under quasi-isothermal conditions

Info

Publication number
GB1391121A
GB1391121A GB2100372A GB2100372A GB1391121A GB 1391121 A GB1391121 A GB 1391121A GB 2100372 A GB2100372 A GB 2100372A GB 2100372 A GB2100372 A GB 2100372A GB 1391121 A GB1391121 A GB 1391121A
Authority
GB
United Kingdom
Prior art keywords
sample
temperature
reactions
phase transformation
phase transformations
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
GB2100372A
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.)
Magyar Optikai Muvek
Magyar Optikai Muevek
Original Assignee
Magyar Optikai Muvek
Magyar Optikai Muevek
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 Magyar Optikai Muvek, Magyar Optikai Muevek filed Critical Magyar Optikai Muvek
Publication of GB1391121A publication Critical patent/GB1391121A/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
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
    • G01N25/48—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation
    • G01N25/4846—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation for a motionless, e.g. solid sample
    • G01N25/4866—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation for a motionless, e.g. solid sample by using a differential method

Landscapes

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

Abstract

1391121 Differential thermal analysis MAGYAR OPTIKAI MUVEK 5 May 1972 [17 Aug 1971] 21003/72 Heading G1N [Also in Division G3] In an apparatus for the investigation of phase transformations and reactions of a material by differential thermal analysis, a material sample 1, Fig. 2 is placed in crucible 2 within an electric furnace 15, while an inert reference material 3 which does not suffer chemical or physical changes when heated, is placed in a crucible 4. The temperatures of the sample and reference materials are sensed by thermocouples 6, 5 respectively connected in series opposition in a bridge. A mirror galvanometer 9 is deflected by an amount depending upon the difference in temperatures sensed and activates either a photo-cell 11 or 12 by reflecting light from a light source 10 depending upon which material has the higher temperature. This causes a switching device 13 and a programme regulator 14 to control the heating current of the furnace accordingly. Thereby the temperature of the sample can be rapidly increased as long as no change takes place in the sample such as phase transformation or reaction in its crystal structure, in which event quasi-isothermal conditions are ensured by the control arrangement. The temperature of the sample 1 is measured by a galvonometer 8 and recorded on a photosensitive strip 17. When a phase transformation occurs (point b in curve TA) the temperature of the sample stops increasing and remains steady until point c, and a finite differential temperature obtains which is used as described above to control the furnace. The apparatus thus controls the rate of phase transformation, and this rate may be reduced to a minimum so that phase transformations occur at practically isothermal and thus equilibrium conditions.
GB2100372A 1971-08-17 1972-05-05 Apparatus for investigating phase transformations and reactions in substances under quasi-isothermal conditions Expired GB1391121A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HUMA002258 1971-08-17

Publications (1)

Publication Number Publication Date
GB1391121A true GB1391121A (en) 1975-04-16

Family

ID=10998523

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2100372A Expired GB1391121A (en) 1971-08-17 1972-05-05 Apparatus for investigating phase transformations and reactions in substances under quasi-isothermal conditions

Country Status (5)

Country Link
CH (1) CH538688A (en)
DE (1) DE2222071A1 (en)
FR (1) FR2139494A5 (en)
GB (1) GB1391121A (en)
IT (1) IT960635B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2152673A (en) * 1983-11-05 1985-08-07 Systematic Micro Limited Temperature monitoring system
GB2176011A (en) * 1985-05-10 1986-12-10 Magyar Optikai Muevek Method of and system for investigating thermal transformation
US5849115A (en) * 1994-05-17 1998-12-15 Honda Giken Kogyo Kabushiki Kaisha Alloy material for thixocasting, process for preparing semi-molten alloy material for thixocasting and thixocasting process

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5165792A (en) * 1991-01-08 1992-11-24 Ta Instruments, Inc. Method and apparatus for high resolution analysis
US5321719A (en) * 1993-05-26 1994-06-14 Ta Instruments, Inc. Thermogravimetric apparatus
DE102016006453B4 (en) * 2016-05-24 2021-09-02 Technische Universität Ilmenau Method for the automatic regulation of a phase change process and its use

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2152673A (en) * 1983-11-05 1985-08-07 Systematic Micro Limited Temperature monitoring system
GB2176011A (en) * 1985-05-10 1986-12-10 Magyar Optikai Muevek Method of and system for investigating thermal transformation
GB2176011B (en) * 1985-05-10 1989-07-12 Magyar Optikai Muevek Method of and system for investigating thermal transformation
US5849115A (en) * 1994-05-17 1998-12-15 Honda Giken Kogyo Kabushiki Kaisha Alloy material for thixocasting, process for preparing semi-molten alloy material for thixocasting and thixocasting process

Also Published As

Publication number Publication date
IT960635B (en) 1973-11-30
CH538688A (en) 1973-06-30
DE2222071A1 (en) 1973-02-22
FR2139494A5 (en) 1973-01-05

Similar Documents

Publication Publication Date Title
US3283560A (en) Differential thermal analysis apparatus
GB2176011A (en) Method of and system for investigating thermal transformation
US3417604A (en) Methods and apparatus for differential thermal analysis
GB1065558A (en) Chemical analysis
US3566079A (en) Temperature linearization circuit
GB1391121A (en) Apparatus for investigating phase transformations and reactions in substances under quasi-isothermal conditions
US3643491A (en) Derivative differential scanning microcalorimeter
GB1061231A (en) Device for the thermal study of a sample
US3747396A (en) Linearizing circuit for a ramp generator in a differential scanning calorimeter
GB1119856A (en) Improvements in apparatus and method of controlling pressure
US3869914A (en) Isothermal calorimetry method and apparatus therefor
GB956347A (en) Improvements in or relating to electrical control instruments
Kulp et al. Improved differential thermal analysis apparatus
GB1298526A (en) Improvements in or relating to apparatus for measuring temperatures
GB1531107A (en) Apparatus and method for measuring the self-heating rate of a chemical reaction
GB1422735A (en) Apparatus for carrying out differential thermal analysis
Raskin et al. An Adiabatic Apparatus for the Study of Self‐Heating of Poorly Conducting Materials
SU425166A1 (en) PROGRAM THERMAL REGULATOR FOR GRADIENT ELECTRIC OVENS
Cioffi et al. Solid-Liquid Equilibrium in the Benzene-Pyridine System.
SU600540A1 (en) Temperature control device
GB1068375A (en) Flash point testing or measuring instrument and method
SU99305A1 (en) Measuring device for controlling the size of products
SU1236334A1 (en) Versions of differential microcalorimeter
SU117828A1 (en) Automatic furnace temperature controller, for example, for melting vacuum glass
SU1006938A1 (en) Thermosensing element material

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee