GB616838A - Improvements in or relating to methods of heat treating inorganic compounds - Google Patents
Improvements in or relating to methods of heat treating inorganic compoundsInfo
- Publication number
- GB616838A GB616838A GB1828346A GB1828346A GB616838A GB 616838 A GB616838 A GB 616838A GB 1828346 A GB1828346 A GB 1828346A GB 1828346 A GB1828346 A GB 1828346A GB 616838 A GB616838 A GB 616838A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relating
- methods
- heat treating
- inorganic compounds
- furnace
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/14—Methods for preparing oxides or hydroxides in general
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/55—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing beryllium, magnesium, alkali metals or alkaline earth metals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Luminescent Compositions (AREA)
Abstract
Metal oxides in friable form are produced by heating metal compounds in a furnace solely by means of radiant heat so that the heat reaches the material as far as possible only through the upper surface. The process is applicable to the decomposition of rare earth metal nitrates, and is particularly described as applied to the production of luminescent strontium and barium oxides. Strontium hydroxide monohydrate, say, to which is added an activator such as lead or bismuth, in an alumina crucible, is placed in a furnace electrically heated from the top and already in excess of 700 DEG C. The foam formed is finally heated at, say, 1300-1400 DEG C., for a period permitting growth of the oxide crystals, and after cooling, removed with a quartz rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1828346A GB616838A (en) | 1946-06-18 | 1946-06-18 | Improvements in or relating to methods of heat treating inorganic compounds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1828346A GB616838A (en) | 1946-06-18 | 1946-06-18 | Improvements in or relating to methods of heat treating inorganic compounds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB616838A true GB616838A (en) | 1949-01-27 |
Family
ID=10109803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1828346A Expired GB616838A (en) | 1946-06-18 | 1946-06-18 | Improvements in or relating to methods of heat treating inorganic compounds |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB616838A (en) |
-
1946
- 1946-06-18 GB GB1828346A patent/GB616838A/en not_active Expired
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