GB960720A - Refractory metal compounds - Google Patents
Refractory metal compoundsInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018229265A1 (en) | 2017-06-16 | 2018-12-20 | Seaborg Aps | Molten salt reactor |
-
1958
- 1958-08-28 GB GB27726/58A patent/GB960720A/en not_active Expired
Cited By (1)
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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