GB1464903A - Growing crystals - Google Patents
Growing crystalsInfo
- Publication number
- GB1464903A GB1464903A GB3598274A GB3598274A GB1464903A GB 1464903 A GB1464903 A GB 1464903A GB 3598274 A GB3598274 A GB 3598274A GB 3598274 A GB3598274 A GB 3598274A GB 1464903 A GB1464903 A GB 1464903A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crystal
- crystal material
- vessel
- temperature
- deposited
- 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
Landscapes
- Crystals, And After-Treatments Of Crystals (AREA)
- Enzymes And Modification Thereof (AREA)
Abstract
1464903 Growing crystals PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 15 Aug 1974 [18 Aug 1973] 35982/ 74 Heading B1S A method of growing crystals in a crystallisation vessel comprises the periodic deposition of the crystal material from a transporting phase of the crystal material present in the vessel and the partial retransfer of crystal material deposited at the site of the crystal growth to the transporting phase which is separated from the deposition site, the periods of deposition and retransfer being such that (a) a net amount of material is deposited at the site of crystal growth and (b) the formation of parasitic seeds is suppressed. The quantity of the crystal material deposited on a perfect seed crystal is larger in any period than the quantity of the crystal material retransferred to the transporting phase so long as the grown crystal is perfect; and the quantity of the crystal material retransferred to the transporting phase is larger in any period than the quantity of deposited crystal material as soon as and as long as the crystal to be grown shows structural defects. As shown in Fig. I at least two defined regions of the circumference of the crystallisation vessel 1 are heated simultaneously and the temperature of the circumference is increased and decreased periodically relative to the temperature of the centre by rotation through tube 13 of the vessel, the defined hot regions being formed by a fixed wire loop heater 6 and thermal losses being overcome by means of heater 9. When the crystallisation vessel 1 is rotated in the temperature gradient which extends at right angles to the axis of the vessel the starting crystal material 2 will pass alternately through an undersaturated and a supersaturated region and material transport takes place, e.g. sublimation, when the average valve of the temperature as a function of time from all the circumferential points is different from that of the temperature of the centre. The growth of large single crystals of HgI 2 is exemplified.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19732341820 DE2341820A1 (en) | 1973-08-18 | 1973-08-18 | METHOD AND DEVICE FOR CULTIVATING CRYSTALS AND CRYSTALS PRODUCED BY THIS PROCESS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1464903A true GB1464903A (en) | 1977-02-16 |
Family
ID=5890107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3598274A Expired GB1464903A (en) | 1973-08-18 | 1974-08-15 | Growing crystals |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5051084A (en) |
| CA (1) | CA1054903A (en) |
| DE (1) | DE2341820A1 (en) |
| FR (1) | FR2245395B1 (en) |
| GB (1) | GB1464903A (en) |
| IT (1) | IT1019992B (en) |
| NL (1) | NL7410866A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005003407B4 (en) * | 2005-01-25 | 2010-05-06 | Karlsruher Institut für Technologie | Process for the preparation of colloidal crystals or colloidal particle systems |
-
1973
- 1973-08-18 DE DE19732341820 patent/DE2341820A1/en not_active Withdrawn
-
1974
- 1974-08-14 NL NL7410866A patent/NL7410866A/en unknown
- 1974-08-14 FR FR7428187A patent/FR2245395B1/fr not_active Expired
- 1974-08-14 IT IT2636974A patent/IT1019992B/en active
- 1974-08-15 GB GB3598274A patent/GB1464903A/en not_active Expired
- 1974-08-16 JP JP9347874A patent/JPS5051084A/ja active Pending
- 1974-08-19 CA CA207,461A patent/CA1054903A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT1019992B (en) | 1977-11-30 |
| DE2341820A1 (en) | 1975-03-13 |
| JPS5051084A (en) | 1975-05-07 |
| CA1054903A (en) | 1979-05-22 |
| NL7410866A (en) | 1975-02-20 |
| FR2245395A1 (en) | 1975-04-25 |
| FR2245395B1 (en) | 1978-11-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |