GB928351A - New or improved materials and moulded bodies of high electrical and thermal conductivity and high chemical resistance and a process for the manufacture thereof - Google Patents

New or improved materials and moulded bodies of high electrical and thermal conductivity and high chemical resistance and a process for the manufacture thereof

Info

Publication number
GB928351A
GB928351A GB22499/59A GB2249959A GB928351A GB 928351 A GB928351 A GB 928351A GB 22499/59 A GB22499/59 A GB 22499/59A GB 2249959 A GB2249959 A GB 2249959A GB 928351 A GB928351 A GB 928351A
Authority
GB
United Kingdom
Prior art keywords
graphite
moulded
graphite particles
aggregate
manufacture
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
GB22499/59A
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.)
SOUTH AFRICAN COUNCIL SCIENTIF
Original Assignee
SOUTH AFRICAN COUNCIL SCIENTIF
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 SOUTH AFRICAN COUNCIL SCIENTIF filed Critical SOUTH AFRICAN COUNCIL SCIENTIF
Publication of GB928351A publication Critical patent/GB928351A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C04B35/528—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
    • C04B35/532—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components containing a carbonisable binder
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Ceramic Products (AREA)

Abstract

A conducting material, heat and pressure moulded under conditions preventing or inhibiting lateral spreading of the moulded substance and having a specific resistance below 0,1 Ohm. cm. comprises an aggregate of graphite particles, the majority of which have a smaller overall anisotropy than a single crystal of graphite, which aggregate has been compressed under substantially solvent-free conditions, and as binder for the aggregate 5 to 30% wt. of a heat and chemical resistant thermoplastic resin which softens over a range of at least 2 DEG C., the anisotropy of the macro-structure of the total material corresponding to a preferential crystallographic orientation of the crystallites of not more than 30%, the degree of orientation in the material being defined as the distribution of 002 planes in all possible angular positions. Suitable graphite particles are derived from waste graphite powder. Resins specified are polymers of halo-hydrocarbons, e.g. polyvinyl chloride, polytrifluoromonochloroethylene and polytetrafluoroethylene. The material may be used in the construction of chemical apparatus or as an electrode. Composite moulded bodies are claimed wherein the material of the invention is used to form an electrode which is integrally moulded with a holder constituted by a material comprising the same components but differing in resin content, size and size distribution of graphite particles and shape of graphite particles and degree of compression, e.g. that described and claimed in Specification 928,352. Graphs (not shown) are provided showing how the graphite particle size distribution, moulding temperature and pressure, and resin content affect the resistivity, porosity and strength of the product. Nearly all the points plotted correspond with products not satisfying the resistivity requirement of Claim 1 but it is stated that by correlating the graphs combinations of factors providing the products claimed can be predicted. Specifications 653,367 and 729,321 also are referred to.
GB22499/59A 1958-07-04 1959-06-30 New or improved materials and moulded bodies of high electrical and thermal conductivity and high chemical resistance and a process for the manufacture thereof Expired GB928351A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA5832158 1958-07-04
ZA582320 1958-07-04

Publications (1)

Publication Number Publication Date
GB928351A true GB928351A (en) 1963-06-12

Family

ID=27130872

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22499/59A Expired GB928351A (en) 1958-07-04 1959-06-30 New or improved materials and moulded bodies of high electrical and thermal conductivity and high chemical resistance and a process for the manufacture thereof

Country Status (1)

Country Link
GB (1) GB928351A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2812120A1 (en) * 2000-07-24 2002-01-25 Commissariat Energie Atomique A composite conductive material for use in the form of electrodes for fuel cells contains lamellar graphite, agglomerated lamellar graphite and conductive fibers in an fluorinated thermoplastic binder
US7147960B2 (en) 2000-07-24 2006-12-12 Commissariat A L'energie Atomique Conductive composite material and electrode for fuel cell using said material formed by thermo-compression

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2812120A1 (en) * 2000-07-24 2002-01-25 Commissariat Energie Atomique A composite conductive material for use in the form of electrodes for fuel cells contains lamellar graphite, agglomerated lamellar graphite and conductive fibers in an fluorinated thermoplastic binder
WO2002009220A3 (en) * 2000-07-24 2002-05-30 Commissariat Energie Atomique Conductive composite material and fuel cell electrode using same
JP2004505418A (en) * 2000-07-24 2004-02-19 コミツサリア　タ　レネルジー　アトミーク Conductive composite material and electrode for fuel cell using the conductive composite material
US7147960B2 (en) 2000-07-24 2006-12-12 Commissariat A L'energie Atomique Conductive composite material and electrode for fuel cell using said material formed by thermo-compression
US7182887B2 (en) 2000-07-24 2007-02-27 Commissariat A L'energie Atomique Conductive composite material and fuel cell electrode using same

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