EP0042327B1 - Mehrteiliger Schmelztiegel - Google Patents
Mehrteiliger Schmelztiegel Download PDFInfo
- Publication number
- EP0042327B1 EP0042327B1 EP81400913A EP81400913A EP0042327B1 EP 0042327 B1 EP0042327 B1 EP 0042327B1 EP 81400913 A EP81400913 A EP 81400913A EP 81400913 A EP81400913 A EP 81400913A EP 0042327 B1 EP0042327 B1 EP 0042327B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crucible
- platinum
- container
- receptacle
- graphite
- 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
- 239000002131 composite material Substances 0.000 title claims abstract description 9
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 57
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 27
- 229910021397 glassy carbon Inorganic materials 0.000 claims abstract description 9
- 230000006698 induction Effects 0.000 claims abstract description 9
- 230000008018 melting Effects 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000004458 analytical method Methods 0.000 claims description 3
- 229910000510 noble metal Inorganic materials 0.000 claims description 3
- 239000003575 carbonaceous material Substances 0.000 claims description 2
- 229910001260 Pt alloy Inorganic materials 0.000 abstract description 3
- 239000011819 refractory material Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 229910002804 graphite Inorganic materials 0.000 description 21
- 239000010439 graphite Substances 0.000 description 21
- 239000000523 sample Substances 0.000 description 11
- 230000004927 fusion Effects 0.000 description 10
- 238000005266 casting Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000012768 molten material Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000538 analytical sample Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012921 fluorescence analysis Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/04—Crucibles
Definitions
- the present invention relates to a composite crucible for the inductive fusion of analytical samples.
- Apparatuses are known, more or less automated, for the preparation, according to a melting-dilution process in a flux, of samples to be analyzed, for example non-metallic samples in the form of beads, intended for fluorescence analysis. of X-rays (FR X).
- Some of these devices use electrical energy and for this purpose include a melting device constituted by a vertical induction coil, excited by a high frequency current and within which is placed the crucible containing the sample.
- the melting crucible like the casting nacelle, are made of a material which must have the following essential properties: sufficient mechanical strength when hot, compatible with the weight of the sample, good conductivity of both electricity and heat, finally be as much as possible stainless and chemically inert, even at the high temperatures required by the fusion of the sample.
- crucibles and nacelles made of noble metal, such as platinum or a platinum alloy, are generally used. These accessories are very expensive and, if the nacelle has a very long lifespan, the crucibles, in fact, are not perfectly unalterable, but must be replaced after a number of fusions varying according to the conditions of use. In this case, we know that certain samples containing metallic phases, such as zinc, can lead to fairly rapid degradation of the crucibles.
- the subject of the invention is a composite crucible for the fusion of non-metallic analysis samples by inductive means and intended to be placed in an induction heating coil supplied with high frequency electric current, crucible consisting of two separate receptacles, nested one inside the other and separable, characterized in that the outer receptacle is made of noble metal, such as platinum or platinum alloy, in that the removable inner receptacle intended to receive the sample to be melted is carbonaceous material, such as graphite or glassy carbon, and in that means are provided for confining the space between the two containers.
- platinum container or “grpahite container” will be used to denote the outer container and the inner container respectively, without being able to prejudge nature. exact chemical of the concerned containers.
- Figures 1 and 3 show, in section, two embodiments of the crucible according to the invention, and Figure 2 a perspective view of the crucible considered.
- the crucible is shown in place on its support within an induction coil 1 with the interposition of an insulating silica jacket 2 which rests on the base 3.
- the heating coil 1 when excited by a high frequency current (of the order several Mega hertz), the induced current is attached to the outer platinum container 4, which quickly balances its temperature with that of the inner graphite container 5 by heat exchange which takes place essentially by radiation.
- This indirect electric heating of the internal container ensures satisfactory fusion of the sample contained therein, substantially as fast as in usual practice (of the order of a minute), but without risk of degradation of the platinum since the latter does not 'is no longer in contact with a molten material capable of damaging it) metallic or reduced phases).
- the internal graphite container 5 is less justified when the sample to be prepared is not of a chemical nature which can react with platinum and must therefore be able to be removed at will. In addition, it inevitably wears out faster than the outer platinum container and must therefore be able to be replaced more frequently.
- outer platinum container 4 is provided with a flange 8 which allows it to bear on the upper end of the jacket 2, thus providing an insulation space between the base 3 and the bottom of the container. thermal.
- the internal container is made of glassy carbon.
- the vitreous carbon is practically not friable, which avoids entraining, at the time of the casting of the sample, carbon particles torn from the wall and which would risk disturbing the further analysis. It should also be noted that the vitreous carbon wears out during successive fusions but this wear is much slower than that of conventional graphite, and it originates, not from mechanical erosion of the wall, but from chemical reactivity with oxygen (release of CO or CO2) which, in any event, does not pollute the sample. Finally, the vitreous carbon, having by definition the consistency of glass, has non-wetting properties for the sample, which makes it possible to recover all the material at the time of casting, without the need for subsequent cleaning of the container. .
- the invention can have numerous variant embodiments, both in the form, the nature or the structure of the composite crucible.
- the crucible can have any geometrical shape insofar as it goes without saying that the two containers which compose it can be nested one inside the other so as to be easily separated, then assembled again. It is understood that in this respect, the most advantageous shape is that of the cylinder, of revolution of pre ference.
- the inner container 5 may slightly exceed the upper limit of the outer container 4 (a few mm), so as to constitute a possible grip and thus facilitate its introduction into the outer container or its withdrawal. It is understood that such an arrangement also makes it possible, as in the case of the flange 7 previously mentioned with reference to FIG. 3, to avoid smearing of molten material on the platinum crucible during the casting of the sample.
- this arrangement can be made in different ways, for example as is the case in the figures by using an inner container of height slightly greater than that of the outer container, or by placing a wedge on the bottom thereof.
- refractory material for example a carbon felt cushion, or equivalent, on which the inner container rests, which makes it possible to obtain the desired height increase.
Landscapes
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sampling And Sample Adjustment (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- General Induction Heating (AREA)
- Glass Compositions (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81400913T ATE9964T1 (de) | 1980-06-12 | 1981-06-09 | Mehrteiliger schmelztiegel. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8013111A FR2484284A1 (fr) | 1980-06-12 | 1980-06-12 | Creuset composite pour la fusion d'echantillons d'analyse par voie inductive |
FR8013111 | 1980-06-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0042327A1 EP0042327A1 (de) | 1981-12-23 |
EP0042327B1 true EP0042327B1 (de) | 1984-10-24 |
Family
ID=9243028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81400913A Expired EP0042327B1 (de) | 1980-06-12 | 1981-06-09 | Mehrteiliger Schmelztiegel |
Country Status (7)
Country | Link |
---|---|
US (1) | US4446563A (de) |
EP (1) | EP0042327B1 (de) |
JP (1) | JPS5715396A (de) |
AT (1) | ATE9964T1 (de) |
CA (1) | CA1171141A (de) |
DE (1) | DE3166801D1 (de) |
FR (1) | FR2484284A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5550353A (en) * | 1990-01-31 | 1996-08-27 | Inductotherm Corp. | Induction heating coil assembly for prevent of circulating current in induction heating lines for continuous-cast products |
US5272720A (en) * | 1990-01-31 | 1993-12-21 | Inductotherm Corp. | Induction heating apparatus and method |
US5257281A (en) * | 1990-01-31 | 1993-10-26 | Inductotherm Corp. | Induction heating apparatus and method |
JPH0685575U (ja) * | 1993-05-14 | 1994-12-06 | 桂司 久保田 | テレビ画面構造 |
US6211424B1 (en) * | 1998-07-30 | 2001-04-03 | Radioactive Isolation Consortium, Llc | Advanced vitrification system |
US6558308B2 (en) * | 2001-05-07 | 2003-05-06 | Radioactive Isolation Consortium, Llc | AVS melting process |
US6485404B1 (en) * | 2002-04-04 | 2002-11-26 | Radioactive Isolation Consortium, Llc | Advanced vitrification system improvements |
DE10361525B4 (de) * | 2003-12-23 | 2005-11-17 | Umicore Ag & Co. Kg | Verfahren zur Herstellung von Schmelztabletten zur Bestimmung des Gehaltes von keramischen Pulvern an Platingruppenmetallen mittels RFA |
CN101507354A (zh) * | 2006-05-30 | 2009-08-12 | 豪梅公司 | 使用石墨熔化容器的熔化方法 |
DE102021205084B4 (de) | 2021-05-19 | 2023-01-12 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | System zur Temperierung von Proben |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR83530E (fr) * | 1963-04-18 | 1964-08-28 | Centre Nat Rech Scient | Dispositif pour la microanalyse thermique différentielle |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR533426A (fr) * | 1921-03-29 | 1922-03-02 | Perfectionnements apportés aux creusets | |
FR85530E (fr) * | 1961-01-30 | 1965-08-27 | Hooker Chemical Corp | Compositions bitumineuses retardatrices d'inflammation |
US3401227A (en) * | 1966-02-09 | 1968-09-10 | Trw Inc | Liner for crucibles |
GB1108640A (en) * | 1966-03-30 | 1968-04-03 | Chyo Balance Corp | Temperature measuring device for thermal analysis |
US3484840A (en) * | 1968-01-26 | 1969-12-16 | Trw Inc | Method and apparatus for melting and pouring titanium |
US3649734A (en) * | 1971-01-29 | 1972-03-14 | Motorola Inc | Crucible electron beam evaporation of aluminum |
GB1442129A (en) * | 1973-01-17 | 1976-07-07 | British Aluminium Co Ltd | Containers for molten metal |
FR2253565A1 (en) * | 1973-12-07 | 1975-07-04 | Ringsdorff Werke Gmbh | Carbon or graphite crucible - for laboratory use in the atmosphere at above 500 deg. C |
DE2510684C3 (de) * | 1975-03-12 | 1979-11-08 | Schweizerische Aluminium Ag, Chippis (Schweiz) | Mehrschichtiger Metalltiegel zum Ziehen von Kristallen |
US4202400A (en) * | 1978-09-22 | 1980-05-13 | General Electric Company | Directional solidification furnace |
-
1980
- 1980-06-12 FR FR8013111A patent/FR2484284A1/fr active Granted
-
1981
- 1981-05-27 JP JP7948281A patent/JPS5715396A/ja active Granted
- 1981-06-08 US US06/271,179 patent/US4446563A/en not_active Expired - Lifetime
- 1981-06-09 EP EP81400913A patent/EP0042327B1/de not_active Expired
- 1981-06-09 AT AT81400913T patent/ATE9964T1/de not_active IP Right Cessation
- 1981-06-09 DE DE8181400913T patent/DE3166801D1/de not_active Expired
- 1981-06-11 CA CA000379564A patent/CA1171141A/fr not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR83530E (fr) * | 1963-04-18 | 1964-08-28 | Centre Nat Rech Scient | Dispositif pour la microanalyse thermique différentielle |
Also Published As
Publication number | Publication date |
---|---|
US4446563A (en) | 1984-05-01 |
CA1171141A (fr) | 1984-07-17 |
JPS5715396A (en) | 1982-01-26 |
JPS6349878B2 (de) | 1988-10-06 |
FR2484284B1 (de) | 1983-11-10 |
EP0042327A1 (de) | 1981-12-23 |
ATE9964T1 (de) | 1984-11-15 |
DE3166801D1 (en) | 1984-11-29 |
FR2484284A1 (fr) | 1981-12-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0042327B1 (de) | Mehrteiliger Schmelztiegel | |
EP0045247B1 (de) | Gerät zur automatischen Vorbereitung von Analyseproben | |
FR2605723A1 (fr) | Four pour le brasage sous vide d'un metal tel que l'aluminium ou des alliages d'aluminium | |
EP0785836B1 (de) | Heiz und giesspfanne für metallschmelze | |
FR3073836A1 (fr) | Procede et dispositif pour alimenter un bain de silicium liquide en particules de silicium solides | |
FR2537261A1 (fr) | Procede et dispositif pour l'utilisation d'un four a arc a courant continu | |
FR2922744A1 (fr) | Chauffe biberon. | |
FR2707272A1 (fr) | Perfectionnements apportés aux rouleaux refroidis pour la manutention de produits notamment métallurgiques et sidérurgiques. | |
JPS6015120Y2 (ja) | 電気炉における内側ルツボ | |
EP0768017B1 (de) | Ofen und herstellungsverfahren für geschmolzene erzeugnisse | |
FR2472152A3 (fr) | Four a fusion pour metaux non ferreux, avec chambre de prechauffage incorporee | |
BE443082A (de) | ||
WO1985004675A1 (fr) | Perfectionnement au dispositif de traitement, au passage, d'un courant de metal ou alliage liquide a base d'aluminium ou de magnesium | |
BE851147A (de) | ||
FR2488876A1 (fr) | Procede de fabrication de tubes ceramiques en b-alumine et electrolyte forme de ces tubes | |
BE851148A (fr) | Procede de coulee continue des metaux | |
FR2477047A1 (fr) | Procede et dispositif pour elaborer un lingot de silicium | |
CH239902A (fr) | Procédé pour la fabrication électrique d'un produit vitreux, et dispositif pour la réalisation de ce procédé. | |
FR2617598A1 (fr) | Dispositif de prelevement de matieres dans un haut fourneau | |
BE851926A (fr) | Four electrique a resistance | |
FR2558399A1 (fr) | Perfectionnements aux lingotieres de coulee continue des metaux, et notamment de l'acier | |
FR2488875A1 (fr) | Procede de production de tubes ceramiques en b-alumine et electrolyte forme de ces tubes | |
BE422871A (de) | ||
FR2811071A1 (fr) | Four a thermoplongeurs electriques pour le chauffage a coeur de metal liquide non ferreux | |
LU88608A1 (fr) | Dispositif de prélèvement d'échantillon de métal en fusion en particulier d'acier à basse teneur en carbone ou d'acier inoxydable |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE GB IT LI LU NL SE |
|
ITCL | It: translation for ep claims filed |
Representative=s name: ING. A. GIAMBROCONO & C. S.R.L. |
|
TCAT | At: translation of patent claims filed | ||
TCNL | Nl: translation of patent claims filed | ||
DET | De: translation of patent claims | ||
17P | Request for examination filed |
Effective date: 19820616 |
|
ITF | It: translation for a ep patent filed |
Owner name: ING. A. GIAMBROCONO & C. S.R.L. |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE GB IT LI LU NL SE |
|
REF | Corresponds to: |
Ref document number: 9964 Country of ref document: AT Date of ref document: 19841115 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 3166801 Country of ref document: DE Date of ref document: 19841129 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
ITTA | It: last paid annual fee | ||
EPTA | Lu: last paid annual fee | ||
EAL | Se: european patent in force in sweden |
Ref document number: 81400913.0 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20000512 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20000515 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20000523 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20000524 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20000526 Year of fee payment: 20 Ref country code: DE Payment date: 20000526 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 20000530 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20000605 Year of fee payment: 20 |
|
BE20 | Be: patent expired |
Free format text: 20010609 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (*IRSID) |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20010608 Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20010608 Ref country code: CH Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20010608 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20010609 Ref country code: LU Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20010609 Ref country code: AT Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20010609 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 20010629 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Effective date: 20010608 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
NLV7 | Nl: ceased due to reaching the maximum lifetime of a patent |
Effective date: 20010609 |
|
EUG | Se: european patent has lapsed |
Ref document number: 81400913.0 |