GB960720A - Refractory metal compounds - Google Patents

Refractory metal compounds

Info

Publication number
GB960720A
GB960720A GB27726/58A GB2772658A GB960720A GB 960720 A GB960720 A GB 960720A GB 27726/58 A GB27726/58 A GB 27726/58A GB 2772658 A GB2772658 A GB 2772658A GB 960720 A GB960720 A GB 960720A
Authority
GB
United Kingdom
Prior art keywords
hydrogen
metal
heated
zirconium
oxide
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
GB27726/58A
Inventor
William Julian Kramers
Walter Bradshaw
James Raymond Smith
Roland Perce Sinden
Philip Sydney Rogers
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB27726/58A priority Critical patent/GB960720A/en
Publication of GB960720A publication Critical patent/GB960720A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C5/00—Moderator or core structure; Selection of materials for use as moderator
    • G21C5/12—Moderator or core structure; Selection of materials for use as moderator characterised by composition, e.g. the moderator containing additional substances which ensure improved heat resistance of the moderator
    • 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
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • 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
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
    • 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
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
    • 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
    • C04B35/50—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare-earth compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Composite Materials (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Catalysts (AREA)

Abstract

A refractory compound having an hydrogen dissociation pressure comprises a metal, a non-metal comprising nitrogen, oxygen, or carbon, and hydrogen in an amount not less than 0.25 atoms of hydrogen per atom of metal, the non-metal being combined with the metal to form a crystal lattice, and the hydrogen being chemically bound in the lattice and being displaceable as free hydrogen without disrupting the lattice. The metal is preferably zirconium, titanium, or a rare earth metal, including yttrium; these metals may be present together with calcium, or with lithium or plutonium in an amount up to 20% of the total metal ions. The compounds may be prepared by heating a metal hydride with a refractory metal oxide, carbide, or nitride in the presence of hydrogen to form a single phase product; reaction normally takes place at above 1000 DEG C. but in the case of lithium compounds may be as low as 500 DEG C. Compounds containing sulphur, carbon, or nitrogen in addition to oxygen are prepared by heating a metal hydride with a refractory metal oxide and a metal sulphide, carbide, or nitride in the presence of hydrogen. Metal compounds (e.g. lithium hydroxide) which produce the desired oxide &c. at reaction temperature may be used. In examples (1)-(3) cerium oxide and cerium hydride are heated in hydrogen at 1250 DEG C. to form CeO0.75H1.5; (4) zirconium nitride is heated with zirconium metal powder at 1500 DEG C. in hydrogen to form ZrN 1/3 H1.2; (5) a mixture of zirconium metal powder and graphite is heated in hydrogen to 1600 DEG C. forming ZrC 2/3 H\ba1/4 ; (6) a mixture of cerium hydride, cerium monosulphide, and cerium oxide is heated in hydrogen to 1200 DEG C. forming Ce2OSH2; (7) lithium hydroxide, lithium hydride, and zirconium metal powder are heated in hydrogen to 700 DEG C. to form LiZr0,2O0.5H 2/3 ; (8) calcium hydride and zirconium oxide are heated in hydrogen at 1500 DEG C. yielding CaZrO2H1,0; (9) zirconium oxide, zirconium metal, and graphite are heated in hydrogen at 1600 DEG C. yielding ZrO0.6C0.2H0.8; (10) a mixture of alumina and cerium hydride heated in hydrogen at 1250 DEG C. yields cerium aluminium hydro-oxide; (11) a mixture of zirconium disulphide, zirconium oxide, and zirconium metal is heated in hydrogen at 1300 DEG C. forming Zr2OSH; (12) a mixture of cerium sulphide, cerium hydride, and lithium hydroxide heated at 1250 DEG C. in hydrogen forms cerium lithium hydro-oxysulphide; (13) lithium hydroxide and titanium anhydride heated at 900 DEG C. in hydrogen form lithium titanium hydro-oxide; (14) titanium dioxide and titanium dihydride heated to 1200 DEG C. in hydrogen from titanium hydro-oxide. The materials formed are useful as solid moderators in high temperature nuclear reactors; their neutronic properties may be altered by adding a small quantity of uranium or by isotopic replacement of hydrogen. The third Provisional Specification refers to the preparation of ceramic materials containing beryllium or uranium.
GB27726/58A 1958-08-28 1958-08-28 Refractory metal compounds Expired GB960720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB27726/58A GB960720A (en) 1958-08-28 1958-08-28 Refractory metal compounds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB27726/58A GB960720A (en) 1958-08-28 1958-08-28 Refractory metal compounds

Publications (1)

Publication Number Publication Date
GB960720A true GB960720A (en) 1964-06-17

Family

ID=10264273

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27726/58A Expired GB960720A (en) 1958-08-28 1958-08-28 Refractory metal compounds

Country Status (1)

Country Link
GB (1) GB960720A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018229265A1 (en) 2017-06-16 2018-12-20 Seaborg Aps Molten salt reactor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018229265A1 (en) 2017-06-16 2018-12-20 Seaborg Aps Molten salt reactor

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