DE2504153A1 - GLASS FOR DISPLAY TUBES - Google Patents
GLASS FOR DISPLAY TUBESInfo
- Publication number
- DE2504153A1 DE2504153A1 DE19752504153 DE2504153A DE2504153A1 DE 2504153 A1 DE2504153 A1 DE 2504153A1 DE 19752504153 DE19752504153 DE 19752504153 DE 2504153 A DE2504153 A DE 2504153A DE 2504153 A1 DE2504153 A1 DE 2504153A1
- Authority
- DE
- Germany
- Prior art keywords
- glass
- glasses
- oxide
- composition
- degrees
- 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.)
- Withdrawn
Links
- 239000011521 glass Substances 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 2
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims 2
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims 1
- 229910052787 antimony Inorganic materials 0.000 claims 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims 1
- 229910052785 arsenic Inorganic materials 0.000 claims 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims 1
- 229910001928 zirconium oxide Inorganic materials 0.000 claims 1
- 230000001133 acceleration Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000004031 devitrification Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- HJTAZXHBEBIQQX-UHFFFAOYSA-N 1,5-bis(chloromethyl)naphthalene Chemical compound C1=CC=C2C(CCl)=CC=CC2=C1CCl HJTAZXHBEBIQQX-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- HEHRHMRHPUNLIR-UHFFFAOYSA-N aluminum;hydroxy-[hydroxy(oxo)silyl]oxy-oxosilane;lithium Chemical compound [Li].[Al].O[Si](=O)O[Si](O)=O.O[Si](=O)O[Si](O)=O HEHRHMRHPUNLIR-UHFFFAOYSA-N 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- GOLCXWYRSKYTSP-UHFFFAOYSA-N arsenic trioxide Inorganic materials O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910052670 petalite Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/102—Glass compositions containing silica with 40% to 90% silica, by weight containing lead
- C03C3/105—Glass compositions containing silica with 40% to 90% silica, by weight containing lead containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/102—Glass compositions containing silica with 40% to 90% silica, by weight containing lead
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/863—Vessels or containers characterised by the material thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Description
Glas für BildwiedergaberöhrenGlass for display tubes
Die Erfindung bezieht sich auf Glas für einen Kolben einer Farbbildwiedergaberöhre, insbesondere Frontglas einer solchen Röhre.The invention relates to glass for a bulb of a color picture display tube, in particular the front glass of such a tube.
Aus der deutschen Offenlegungsschrift 2 048 523 ist eine derartige Reihe besonderer Gläser bekannt, deren Zusammensetzung in Gew.% innerhalb des nachstehenden Bereiches liegt mit den dabei angegebenen Nebenbedingungen:
Diese Reihe von Gläsern gemäß dieser Patentanmeldung entspricht der damals erschwerten Anforderung in bezug auf die Durchlässigkeit für Röntgenstrahlung. Diese erschwerte Anforderung bedeutet, dass bei einer Beschleunigungsspannung von 35 kV und einem Anodenstrom von 3 x 100 µA in einer Bildwiedergaberöhre die Intensität der durchgelassenen Röntgenstrahlung höchstens 0,5 Milliröntgen pro Stunde (mr/h) beträgt, in einem Abstand von 5 cm von dem Frontglas gemessen.This series of glasses according to this patent application corresponds to the then difficult requirement with regard to the transmission of X-rays. This more difficult requirement means that with an acceleration voltage of 35 kV and an anode current of 3 x 100 µA in a picture display tube, the intensity of the transmitted X-rays is at most 0.5 milli-x-rays per hour (mr / h) at a distance of 5 cm from the Front glass measured.
ausgehend von einer Mindestdicke des Frontglases von 11 mm, entspricht die vorgenannte Reihe von Gläsern dieser Anforderung reichlich; eine Anzahl innerhalb dieses Zusammensetzungsbereiches liegender Gläser bleibt sogar bei einer Beschleunigungsspannung von 40 kV unterhalb des vorgenannten Wertes.Assuming a minimum thickness of the front glass of 11 mm, the above-mentioned series of glasses fully meets this requirement; A number of glasses lying within this composition range remain below the aforementioned value even at an acceleration voltage of 40 kV.
Diese Gläser bildeten einen gut getroffenen Kompromiss in bezug auf die übrigen an Glaser für diese Anwendung zu stellenden Anforderungen, und zwar a) der Temperaturunterschied zwischen der Erweichungstemperatur (d.h. die Temperatur, bei der die Viskosität des Glases 10[hoch]7,6 Poises beträgt) und dem oberen Kühlpunkt (d.h. die Temperatur, bei der die Viskosität des Glases 10[hoch]13,4 Poises beträgt) muss mindestens 190 Grad C betragen.These glasses represented a well-made compromise with respect to the remaining requirements to be placed on glasses for this application, namely a) the temperature difference between the softening temperature (ie the temperature at which the viscosity of the glass 10 [high] is 7.6 poises) and the upper cooling point (ie the temperature at which the viscosity of the glass 10 [high] is 13.4) Poises) must be at least 190 degrees C.
b) Der obere Kühlpunkt soll nicht niedriger als 485 Grad C sein.b) The upper cooling point should not be lower than 485 degrees C.
c) Der Wärmeausdehnungskoeffizient muss etwa 100x10[hoch]-7/Grad C im Bereich von 30 - 300 Grad C betragen.c) The coefficient of thermal expansion must be around 100x10 [high] -7 / degree C in the range of 30 - 300 degrees C.
d) Die Gläser dürfen keine Entglasungserscheinungen aufweisen.d) The glasses must not show any signs of devitrification.
e) Beim Wiedergebrauch von Ausschussfrontgläsern, wobei die Leuchtsoffschicht entfernt wird und die Frontgläser mit Hilfe einer fluorwasserstoffsäurehaltigen Lösung gereinigt werden, darf kein selektiver Angriff auftreten, unde) When re-using reject front glasses, whereby the phosphor layer is removed and the front glasses are cleaned with the aid of a solution containing hydrofluoric acid, no selective attack may occur, and
f) der Wert von Tp (d.h. die Temperatur, bei der p = 10[hoch]6,5 groß Omega.cm beträgt) soll nicht niedriger als 360 Grad C sein.f) the value of Tp (i.e. the temperature at which p = 10 [high] 6.5 large Omega.cm) should not be lower than 360 degrees C.
Die Neigung, die Sicherheitsmarge in bezug auf die von Bildwiedergaberöhren abgegebene Röntgenstrahlung immer weiter zu erhöhen, hat sich noch weiter fortgesetzt.The tendency to increase the safety margin with respect to the X-radiation emitted by display tubes has continued even further.
Nach dieser erschwerten Anforderung darf eine mit einer Beschleunigungsspannung von 40 kV bei einem Anodenstrom von 3 x 100 µA betriebene Bildwiedergaberöhre höchstens 0,5 mr/h an Röntgenstrahlung, in einem Abstand von 5 cm von dem Schirm gemessen, abgeben.According to this more difficult requirement, a picture display tube operated with an acceleration voltage of 40 kV at an anode current of 3 x 100 µA may not exceed 0.5 mr / h of X-rays at a distance measured 5 cm from the screen.
Durch Erhöhung des Anteiles an Oxiden von Schwermetallen in Glas vom obenstehenden Typ kann diese erschwerte Anforderung leicht erfüllt werden, aber das Problem ergibt sich, dass zu gleicher Zeit die übrigen Eigenschaften, die oben erwähnt wurden, sich nicht ändern dürfen.By increasing the proportion of oxides of heavy metals in glass of the above type, this difficult requirement can easily be met, but the problem arises that at the same time the other properties mentioned above must not change.
Die Erfindung bezweckt, eine Reihe von Gläsern zu schaffen, mit denen dieser Komplex von Eigenschaften beibehalten wird und von denen einige bei einer Beschleunigungsspannung von bis zu 45 kV eine Röntgenstrahlungsdurchlässigkeit bis zu höchstens 0,5 mr/h zeigen, Überraschenderweise hat es sich als möglich erwiesen, in bezug auf die vorerwähnten bekannten Gläser den Zr0[tief]2-Gehalt noch weiter zu erhöhen, ohne dass Entglasungserscheinungen auftraten. Im allgemeinen erhöht Zr0[tief]2 die Kristallisationsneigung von Gläsern in erheblichem Masse; Zr0[tief]2 ist ein vielfach verwendetes Keimbildungsmittel bei der Herstellung von Glaskeramik.The invention aims to provide a series of glasses with which this complex of properties is retained and some of which show an X-ray transmission of up to a maximum of 0.5 mr / h at an accelerating voltage of up to 45 kV. Surprisingly, it has been found possible proved to increase the Zr0 [deep] 2 content even further in relation to the aforementioned known glasses without devitrification phenomena occurring. In general, Zr0 [deep] 2 increases the tendency of glasses to crystallize to a considerable extent; Zr0 [deep] 2 is a widely used nucleating agent in the manufacture of glass ceramics.
Die Gläser nach der Erfindung sind dadurch gekennzeichnet, dass ihre Zusammensetzung in Gew.% innerhalb des nachstehenden Bereiches liegt:The glasses according to the invention are characterized in that their composition in% by weight is within the following range:
Vorzugsweise werden Gläser mit einer Zusammensetzung in Gew.% innerhalb des folgenden Bereiches verwendet, die sogar bei einer Beschleunigungsspannung von 45 kV eine Röntgenstrahlendruchlässigkeit von nicht mehr als 0,5 mr/h zeigen:
Als Beispiel folgen nun einige Gläser nach der Erfindung mit Angabe der wesentlichen physikalischen Größen. Sie werden auf in der Glastechnologie übliche Weise durch Schmelzen eines Gemisches von Sand, Kaliumcarbonat, Natriumcarbonat, Dolomit, Ceroxid, Bariumcarbonat, Zirkonsilikat, Antimonoxid und Natriumsilicofluorid und nötigenfalls Feldspat, Magnesiumoxid, Calciumcarbonat, Petalit, Bleimennige, Natriumitrat und Arsentrioxid dargestellt.As an example, some glasses according to the invention now follow with details of the essential physical quantities. They are produced in the usual way in glass technology by melting a mixture of sand, potassium carbonate, sodium carbonate, dolomite, cerium oxide, barium carbonate, zirconium silicate, antimony oxide and sodium silicofluoride and, if necessary, feldspar, magnesium oxide, calcium carbonate, petalite, red lead, sodium nitrate and arsenic trioxide.
Die betreffenden Gemenge werden bei 1400 Grad C in einem gasgeheizten Ofen in einem Platintiegel mit einem Luftüberschuss von 1 : 2,5 angeordnet. Nach Schmelzen wird die Temperatur im Ofen 2,5 Stunden lang auf 1450 Grad C gehalten; dann wird der Ofen auf 1200 Grad C gekühlt, wonach die Gläser ausgegossen werden.The batches concerned are placed in a gas-heated furnace in a platinum crucible with an excess of air of 1: 2.5 at 1400 degrees C. After melting, the temperature in the furnace is kept at 1450 degrees C for 2.5 hours; then the oven is cooled to 1200 degrees C, after which the glasses are poured out.
Der obere Kühlpunkt und die Erweichungstemperatur sind mit den Abkürzungen o.K.p bzw. E.t. bezeichnet.The upper cooling point and the softening temperature are indicated by the abbreviations o.K.p and E.t. designated.
Die Ausdehnungskoeffizienten der Gläser liegen zwischen 98 und 102 x 10[hoch]-7/Grad C im Bereich von 30 - 300 Grad C.The expansion coefficients of the glasses are between 98 and 102 x 10 [high] -7 / degree C in the range of 30 - 300 degrees C.
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7401936A NL7401936A (en) | 1974-02-13 | 1974-02-13 | GLASS FOR CATHODE RAY TUBES FOR TELEVISION AVE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2504153A1 true DE2504153A1 (en) | 1975-08-14 |
Family
ID=19820736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19752504153 Withdrawn DE2504153A1 (en) | 1974-02-13 | 1975-02-01 | GLASS FOR DISPLAY TUBES |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS50114417A (en) |
| AR (1) | AR204124A1 (en) |
| BE (1) | BE825461A (en) |
| BR (1) | BR7500799A (en) |
| CA (1) | CA1043095A (en) |
| DE (1) | DE2504153A1 (en) |
| DK (1) | DK48075A (en) |
| ES (1) | ES434624A1 (en) |
| FR (1) | FR2260543A1 (en) |
| GB (1) | GB1472390A (en) |
| IT (1) | IT1031590B (en) |
| NL (1) | NL7401936A (en) |
| SE (1) | SE393975B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3011296A1 (en) * | 1979-03-24 | 1980-09-25 | Mitsubishi Electric Corp | CATHODE RAY TUBES FOR A DISPLAY SYSTEM OR THE LIKE. |
| DE3123434A1 (en) * | 1980-06-12 | 1982-06-03 | Nippon Electric Glass Co., Ltd., Otsu, Shiga | GLASS FOR USE IN MONOCHROMATIC, COLORED LIGHT EMISSING CATHODE RAY TUBES |
| US4459510A (en) * | 1979-12-28 | 1984-07-10 | U.S. Philips Corporation | Lamp having a glass lamp vessel and Glass (Na-Ca-Ba-SiO2 with B2 O3 /Al2 O3 /ZrO2) suitable therefor |
| US4804885A (en) * | 1982-02-04 | 1989-02-14 | Tektronix, Inc. | X-ray attenuating ceramic materials |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7613412A (en) * | 1976-12-02 | 1978-06-06 | Philips Nv | ELECTRIC DISCHARGE TUBE. |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4832113A (en) * | 1971-08-30 | 1973-04-27 | ||
| NL7203860A (en) * | 1972-03-23 | 1973-09-25 | ||
| JPS5433189B2 (en) * | 1972-09-08 | 1979-10-18 |
-
1974
- 1974-02-13 NL NL7401936A patent/NL7401936A/en unknown
-
1975
- 1975-01-01 AR AR257593A patent/AR204124A1/en active
- 1975-02-01 DE DE19752504153 patent/DE2504153A1/en not_active Withdrawn
- 1975-02-07 BR BR799/75A patent/BR7500799A/en unknown
- 1975-02-10 CA CA219,736A patent/CA1043095A/en not_active Expired
- 1975-02-10 JP JP50016352A patent/JPS50114417A/ja active Pending
- 1975-02-10 DK DK48075*#A patent/DK48075A/da unknown
- 1975-02-10 IT IT20099/75A patent/IT1031590B/en active
- 1975-02-10 GB GB548875A patent/GB1472390A/en not_active Expired
- 1975-02-10 SE SE7501450A patent/SE393975B/en unknown
- 1975-02-11 ES ES434624A patent/ES434624A1/en not_active Expired
- 1975-02-12 BE BE153300A patent/BE825461A/en unknown
- 1975-02-13 FR FR7504506A patent/FR2260543A1/fr not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| Offenlegungsschrift 2 048 523 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3011296A1 (en) * | 1979-03-24 | 1980-09-25 | Mitsubishi Electric Corp | CATHODE RAY TUBES FOR A DISPLAY SYSTEM OR THE LIKE. |
| US4459510A (en) * | 1979-12-28 | 1984-07-10 | U.S. Philips Corporation | Lamp having a glass lamp vessel and Glass (Na-Ca-Ba-SiO2 with B2 O3 /Al2 O3 /ZrO2) suitable therefor |
| DE3123434A1 (en) * | 1980-06-12 | 1982-06-03 | Nippon Electric Glass Co., Ltd., Otsu, Shiga | GLASS FOR USE IN MONOCHROMATIC, COLORED LIGHT EMISSING CATHODE RAY TUBES |
| US4804885A (en) * | 1982-02-04 | 1989-02-14 | Tektronix, Inc. | X-ray attenuating ceramic materials |
Also Published As
| Publication number | Publication date |
|---|---|
| DK48075A (en) | 1975-10-06 |
| ES434624A1 (en) | 1977-01-16 |
| SE393975B (en) | 1977-05-31 |
| SE7501450L (en) | 1975-08-14 |
| AU7802975A (en) | 1976-08-12 |
| NL7401936A (en) | 1975-08-15 |
| CA1043095A (en) | 1978-11-28 |
| BR7500799A (en) | 1975-11-25 |
| BE825461A (en) | 1975-08-12 |
| IT1031590B (en) | 1979-05-10 |
| JPS50114417A (en) | 1975-09-08 |
| FR2260543A1 (en) | 1975-09-05 |
| GB1472390A (en) | 1977-05-04 |
| AR204124A1 (en) | 1975-11-20 |
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