JP2858646B2 - Mercury donor or mercury donor and method for introducing mercury into electron tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mercury donor material for producing a mercury donor having both a getter function and a mercury donor function, a mercury donor produced in this way, and a method for introducing mercury into an electron tube. It is. here,
"Mercury donation" refers to introducing an appropriate amount of mercury into an electron tube, "mercury donor" refers to a material for generating mercury, and "mercury donor" refers to a material introduced into an electron tube. , A device such as a compressed tablet of mercury donor material or a device for holding a mercury donor material in a container or on a strip.

[0002]

2. Description of the Related Art For example, mercury-arc rectifiers, lasers,
It is well known in the art to use small amounts of mercury in various types of character displays and especially in electron tubes such as fluorescent lamps. The precise delivery of mercury inside these devices is of great importance for the quality of the device and, above all, for environmental and ecological reasons.
In fact, the high toxicity of mercury inherently presents a significant environmental pollution problem in the end use disposal of devices containing mercury and in the event of accidental damage to the device. These environmental and ecology issues impose the use of a minimal amount of mercury that is compatible with the function of the device. These considerations have also recently been considered in the legislative area,
And recent trends in international regulations seek to establish an upper limit on the amount of mercury that can be introduced into devices, for example, for standard fluorescent lamps, the use of less than 10 mg total mercury per lamp has been proposed.

[0003] Mercury can be introduced into an electron tube in liquid form. However, first of all, the use of liquid mercury presents storage and handling problems in equipment for electron tube production because of its high vapor pressure even at room temperature.
Second, a common disadvantage of techniques for introducing mercury in liquid form into electron tubes is the difficulty in accurately and reproducibly providing mercury volumes on the order of microliters. This leads to the introduction of more mercury than necessary.

[0004] These drawbacks have prompted the development of various technologies that replace the use of liquid mercury in an unconstrained form. The use of liquid mercury stored in capsules has been disclosed in several prior art documents. This method is disclosed in U.S. Pat. Nos. 4,823,047 and 4,
754,193 and U.S. Pat. Nos. 4,182,971 and 4,278,90 which refer to mercury containers made of glass.
No. 8 is described. After sealing the electron tube, the mercury is released by a heat treatment that causes damage to the container. These methods generally have several disadvantages. First of all, the preparation of the capsule and its mounting inside the electron tube are complicated and cumbersome, especially if they have to be introduced inside a small internal tube. Second, breakage of the capsule, especially if it is made of glass, creates fragments of material, which can ruin the quality of the electron tube. Thus, U.S. Pat.
No. 335,326 discloses an assembly wherein the mercury storage capsule is further positioned within another capsule which acts as a shield against broken pieces. In addition, the release of mercury is often intense and can damage the internal structure of the electron tube. Finally, these systems still have the fundamental disadvantage of using liquid mercury, and therefore do not completely solve the problem of accurately and reproducibly introducing milligrams of mercury.

US Pat. No. 4,808,136 and European Patent Application EP-568,317 disclose the use of tablets or small spheres of porous material impregnated with mercury. The mercury is then released by heating after sealing the lamp. However, these methods also require complicated operations for mercury penetration inside the tablet, and the reproducibility of the amount of mercury released is difficult.

[0006] The use of mercury amalgams, for example with indium, bismuth or zinc, is also known. However, these amalgams generally have the disadvantage that they have a low melting point and a high mercury vapor pressure even at very low temperatures. For example, "APL Engine
ered Materials Inc. The zinc amalgam described in the industry bulletin has a vapor pressure at 43 ° C. that is about 90% of the vapor pressure of liquid mercury. as a result,
These amalgams cannot withstand heat treatments for the production of lamps incorporating them.

[0007] These problems have been overcome by the assignee's US Pat. No. 3,657,589. This patent has the general formula Ti _x Zr _y Hg _z (wherein, x and y
Can vary from 0 to 13; the sum of x + y can vary from 3 to 13; and z can be 1 or 2). .

These intermetallic compounds of mercury have a mercury release onset temperature that can be varied depending on the particular compound, and they are all stable up to about 500 ° C. both in air and in evacuated volumes. It is therefore suitable for the task of assembling electron tubes, on the way of which the mercury donor (apparatus) can reach temperatures of about 500 ° C. After sealing the electron tube, the mercury
Release from the above-listed compounds is usually achieved by an activation operation performed by heating the material in the range of 750-900 ° C. for about 30 seconds. This heating can be achieved by laser irradiation or by induction heating of the metallic support of the mercury donor compound. Manufactured by the Applicant and referred to as "St50
The use of Ti ₃ Hg sold under the trade name 5) gives particularly beneficial results. In particular, the St505 compound can be obtained by filling the compressed powder into a ring-shaped container or by compressing the powder into a pill or tablet.
B ", or in the form of laminated powder on a metal strip under the trade name" GEMEDIS ".

These materials offer various advantages over the prior art: (1) As noted above, they are at about 350-400 ° C.
Avoids the danger of mercury evaporation during the production cycle of electron tubes that can reach temperatures of (2) As described in U.S. Pat. No. 3,657,589, Co, CO which may interfere with the operation of the electron tube.
Getter materials can be easily added to mercury donor compounds for the purpose of chemisorption of gases such as ₂ , O ₂ , H ₂ and H ₂ O. (3) The amount of mercury release can be easily controlled and reproducible.

[0010] Despite their good chemical-physical properties and their ease of use, these materials have the disadvantage that the stored mercury is not completely released during the activation process. In particular, processes for the production of electron tubes containing mercury are either by glass fusing (eg sealing of fluorescent lamps) or by frit sealing, i.e. by bonding two preformed glass members with a paste of low melting glass. It includes a tube sealing operation performed by welding. During these operations, the mercury donor (equipment) can be subjected to indirect heating up to about 600 ° C. At this stage, the mercury donor is exposed to gases and vapors emitted by the molten glass and, in most industrial processes, to the atmosphere. Under these conditions, the mercury donor material undergoes surface oxidation, resulting in a final yield of less than about 40% of the total mercury content during the activation process. In the particular case of small circular lamps, during the lamp sealing and bending stage,
The mercury donor material is subjected to indirect heating up to about 500 ° C. In this case, the mercury yield during the activation stage drops to about 20% of the total mercury content of the device. Mercury not released during the activation operation is then released gradually over the life of the electron tube. This property, combined with the fact that the electron tube must operate properly from the beginning of its life cycle, requires the introduction of at least twice the theoretical amount of mercury into the mercury donor (apparatus). Leads to sex.

[0011] In order to overcome these problems, EP-A-091,297 proposes to add Ni or Cu to Ti ₃ Hg or Zr ₃ Hg compounds. According to this document, N
The addition of i, Cu results in the melting of the resulting combination material, which favors the release of almost all mercury within seconds. Melting is based on Ni-Ti, Ni-
Occurs at the eutectic temperature of Zr, Cu-Ti and Cu-Zr and is about 880 ° C.
To 1280 ° C. with respect to the Ni 81% -Ti 19% composition (composition is atomic%). However, this document is N
A melting temperature of 770 ° C. is incorrectly described for an i4% -96% Ti composition. This reference acknowledges that the mercury donor compound is altered during the processing of the electron tube and therefore requires protection. For this purpose, it has been proposed to cover the powder container with a steel, copper or nickel sheet which bursts under the pressure of the mercury vapor generated inside the container during activation. This solution is not entirely satisfactory. In fact, the same thing happens in the capsule-using method described above, where the mercury blows out violently, risking damage to the interior of the electron tube and requiring the welding of small sized metal parts, making the container very difficult. Complex and cumbersome.
Furthermore, this document does not contain experimental data supporting the good mercury emission characteristics mentioned there for the indicated combinations. Finally, the device in this document differs from that illustrated in the above-cited U.S. Pat. No. 3,657,589 in that it incorporates the getter material required for proper operation of the lamp in the same device. Do not tolerate that.

[0012]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an improved mercury donor for donating mercury in an electron tube, which makes it possible to overcome the disadvantages of the prior art. is there. In particular, the main object of the present invention is to provide a mercury donor which can release more than 60% of the amount of mercury during the activation stage, even after partial oxidation, so that the total amount of mercury used can be reduced. Is to provide mercury donors for It is another object of the present invention to provide a mercury donor in which the residue after the activation operation for mercury release has a gettering ability.

Another object of the present invention is to provide a mercury donor (apparatus) incorporating a mercury donor as described above. Yet another object of the present invention is to provide a method for introducing mercury into an electron tube requiring mercury by the mercury donor (apparatus).

[0014]

The present invention solves the above-mentioned problems,
(1) mercury and, and titanium, zirconium and mercury donating intermetallic compound component A and a second metal selected from the group consisting of mixtures thereof, and (2) copper and tin and, and rare <br/> earth mercury donor material containing a promoting material component B made of an alloy or intermetallic compound containing one or more metal from among class elements,
It is realized by using a mercury donor that uses it. The mercury donor can further include a getter material. The present invention also introduces a mercury donor into an open electron tube, and after sealing the electron tube, converts the mercury donor to 600 to 900.
Provided is a method for introducing mercury into an electron tube which emits mercury by heating at a temperature in the range of 10 ° C for a period of 10 seconds to 1 minute.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The component A of the mercury donor of the present invention comprises:
As disclosed in U.S. Patent No. 3,657,589, cited above formula Ti _x Zr _y Hg _z (wherein, x and y may vary in the range of 0-13, the sum of x + y (Which can vary from 3 to 13 and z can be 1 or 2). Among materials corresponding to this formula, Zr ₃ Hg, particularly Ti ₃ H
g is preferred.

The component B of the mercury donor according to the present invention has an effect of increasing the release of mercury from the component A, and is also defined as a mercury evaporation promoting material. This component B is an alloy or an intermetallic compound containing a metal or a mixture of rare earth elements selected from the group consisting of copper, tin and rare earth elements. The use of a mixture of rare earth elements is preferred over the use of a single element. This is because these rare earth elements have similar chemical properties and therefore the separation of single elements is a difficult and expensive operation. By using a mixture of rare earth elements,
In the present invention, it is possible to obtain the same results as obtained using a single element. Mixtures of rare earth elements are known in the art under the name "misch metal", and in the following use the designation "Misch metal" or the abbreviation "MM" for short. I do.

Although the weight ratio between copper, tin and MM can vary within a wide range, beneficial results are shown in the ternary composition diagram based on% composition on a weight basis shown in FIG. Sn 36.5% -MM 0.5% b) Cu 63% -Sn 10% -MM 27% c) Cu 30% -Sn 10% -MM 60% d) Cu 3% -Sn 37% -MM 60% e) Cu 3% -Sn 96.5 % -MM 0.5% obtained with a composition that falls within the polygon defined by the point.

At a copper percentage higher than 63%, the alloy reaches a high melting point and consequently requires an excessive temperature for activation, while at a copper percentage lower than about 3% the alloy has a melting point that is too low and Can reach 600-80 during lamp manufacture
At the temperature in the range of 0 ° C., there is a danger of the formation of a low-viscosity liquid phase. At misch metal concentrations higher than 60%, the alloy becomes overly reactive and there is a risk of violent reactions occurring both during the lamp making and activation stages. At tin concentrations below 10%, the alloy also has a low melting point.

Particularly beneficial results are shown in the ternary composition diagram based on the% composition on a weight basis shown in FIG. 4: a) Cu 63% -Sn 36.5% -MM 0.5% b) Cu 63% -Sn 10%- MM27% f) Cu50% -Sn10% -MM40% g) Cu30% -Sn30% -MM40% h) With a composition falling within the polygon defined by the following points: Cu30% -Sn69.5% -MM0.5%. Obtained with.

A particularly preferred alloy is Cu40% -Sn30% -MM3 corresponding to point i) in the ternary composition diagram of FIG.
It has a 0% composition. Cu 60% corresponding to point l)
% Composition of Sn 30% -MM 10% can also be used advantageously.

The weight ratio of components A and B of the mercury donor of the present invention can vary over a wide range but is generally from 20: 1 to 1: 1.
It is in the range of 1:20, preferably 10: 1 to 1: 5.

The components A and B of the mercury donor of the present invention can be used in various physical forms, and it is not necessary that both components be in the same form. For example, component B can be in the form of a coating on a metal support and component A can be present as a powder that is applied to component B by rolling or pressing.
However, optimal results are obtained when both components are in the form of a fine powder having a particle size of less than 250 μm, preferably in the range of 10 to 125 μm.

The present invention, in a second aspect thereof, relates to a mercury donor using mercury donors of components A and B. As already mentioned, one of the advantages of the mercury donor of the present invention over the prior art is that it does not require mechanical protection from the environment and thus does not impose the restrictions of container closure. As a result, the mercury donors of the present invention can be made with quite different geometries, and components A and B
Can be used on or without a support, usually made of metal.

Some types of electron tubes intended for the use of mercury donors require CO, CO for proper operation.
Requires the presence of a getter material for removing _2, H _2, O ₂ or traces of gases such as water vapor. An example is a fluorescent lamp. An important advantage provided by the mercury donor of the present invention is that the residue remaining after evaporation of the mercury has getter capability. The amount and rate of gas that can be adsorbed by this residue is sufficient to ensure adequate vacuum for many applications. To increase the total gas adsorption rate and capacity of the mercury donor, US Pat.
Obviously, it is also possible to add another getter material C according to the embodiment described in US Pat. No. 657,589. Obviously, in this case, the amount of getter material C is less than that required in prior art devices used in the same application. Examples of getter materials include, in particular, titanium,
Zirconium, tantalum, niobium, vanadium and mixtures thereof or alloys with other metals such as nickel, iron and aluminum can be mentioned. As a practical example, an alloy having a composition of 84% by weight of Zr-16% by weight of Al, manufactured and sold by the applicant under the trade name of "St101", filed under the trade names of "St198" and "St199", respectively. Intermetallic compounds Zr ₂ Fe and Zr ₂ manufactured and sold by humans
Ni can be mentioned. The getter material is simultaneously activated during a heat treatment to release mercury in the electron tube.

The getter material C can exist in various physical forms, but is preferably less than 250 μm, preferably less than 10 μm.
It is used in the form of a fine powder having a particle size in the range of １２５125 μm.

The ratio between the total weight of components A and B and the getter material C is between 10: 1 and 1:10, preferably between 5: 1 and 1
It can range from 1: 2.

Some embodiments of the mercury donor of the present invention are illustrated in the drawings. In a first embodiment, the mercury donor 10 of the present invention comprises a tablet consisting of a compressed and unsupported powder of the components A and B (and C if necessary) material. The tablet 10 has a cylindrical or rectangular parallelepiped form for ease of manufacture, and FIG. 1 shows an example of the latter.

When the material is in a supported state, the mercury donor can take the form of a ring as shown in FIG. In FIG. 2, (a) is a top view and (b) is II-
1 shows a cross-sectional view along the line II. In this case, the mercury donor 20
Comprises a ring-shaped support 21 which is annular and contains components A and B (C if necessary) material. The support is generally made of metal, preferably nickel-plated steel.

Alternatively, as shown in FIG. 3, the mercury donor 30 of the present invention can be made in the form of a strip. In FIG. 3, (a) is a top view, and (b) and (c) are cross-sectional views in two modes along the line III-III. In this case, the strip-shaped support 31 is a strip, preferably made of nickel-plated steel, on which the components A and B (if necessary C) material are applied by cold rolling (crimping). In this case, if getter material C is required, materials A, B and C are mixed together and crimped on one or both sides of the strip (FIG. 3b), or materials A and B are applied on one side of the strip. The material C is crimped to the other side (FIG. 3c).

The present invention, in another aspect, relates to a method for introducing mercury into an electron tube by using a mercury donor as described above. The method comprises the steps of introducing a mercury donor, preferably the mercury donor 10, 20, or 30 described above, into an electron tube and subsequently heating to release the mercury. The heating step is, for example, by radiation
This can be done by high frequency induction heating or by passing a current through the support if the support is made of a material having a high electrical resistance. Heating is provided at a temperature that results in the release of mercury from the mercury donor in the range of 600-900C for a period of about 10 seconds to 1 minute. At temperatures below 600 ° C. no mercury is donated, while 900 ° C.
If the temperature exceeds, there is a danger of generating toxic gas or forming metal vapor due to degassing from the electron tube portion adjacent to the mercury donor.

[0031]

The present invention is illustrated by the following examples and comparative examples. These examples are not intended to limit the invention, but are intended to illustrate the manner in which the invention is considered to be preferred. Examples 1 to 3 relate to the preparation of mercury donating and promoting materials, while Examples 4 to 9 relate to a mercury release test after heat treatment simulating a sealing operation. Examples 10-14 are
Relevant for tests examining the function of residual residues after mercury release as getter materials. The metals used to prepare the alloys and compounds for the next test have a minimum purity of 99.5%. Unless otherwise noted, all of the compositions in these examples are by weight.

Example 1 This example illustrates the synthesis of Ti ₃ Hg as a mercury donor material component A. 143.7 g of titanium were placed in a steel cradle and degassed by in-furnace treatment at a temperature of about 700 ° C. and a pressure of 19 ^-6 mbar for 30 minutes. After cooling the titanium powder in an inert atmosphere, 200.6 g of mercury was introduced into the cradle through a quartz tube. The cradle was then closed and heated at about 750 ° C. for 3 hours. After cooling, the product was ground until the resulting powder passed through a standard sieve of 120 μm mesh. The product consisted essentially of Ti ₃ Hg as confirmed by diffraction tests performed on this powder.

(Example 2) This example relates to the preparation of a mercury evaporation promoting alloy component B constituting a part of the mercury donor of the present invention. 40 g of Cu, 30 g of Sn and 30 g of MM, in powder form, were placed in an alumina cradle and subsequently introduced into a vacuum induction furnace. The MM used is
It contained about 50% cerium, 30% lanthanum, 15% neodymium, with the balance being other rare earth elements. The mixture was heated to a temperature of about 900 ° C., maintained at that temperature for 5 minutes to enhance its uniformity, and finally cast into a steel ingot mold. Each ingot was ground in a blade mill and the powder was sieved as in Example 1. The composition of the obtained alloy is Cu 40% -Sn 30% -MM 30%,
This corresponds to point i) in the ternary diagram of FIG.

(Example 3) This example relates to the preparation of a mercury evaporation promoting alloy component B constituting a part of the mercury donor of the present invention. The procedure of Example 2 was repeated using 60 g Cu, 30 g Sn and 10 g MM, in powder form. The composition of the obtained alloy was Cu 60% -Sn 30% -M
M10%, which corresponds to point l) in the ternary diagram of FIG.

Examples 4-9 This example relates to a mercury release test after heat treatment in air to simulate frit conditions to which a mercury donor is exposed during sealing of an electron tube. Examples 4 to 7 show mercury release tests after frit sealing for the case of using only mercury-donating component (Example 4) and the case of mixing copper, tin and the aforementioned getter alloy St101 alone (Examples 5 to 7). It is a comparative example showing a result. A similar comparative test on a mixture of Ti ₃ Hg and MM powder was not possible due to the vigorous reactivity of this mixture.

To simulate the sealing operation, 150 mg of each powder mixture was filled into a ring-shaped container as in FIG. 2 or deposited on a strip as shown in FIG. 3 and subjected to the next thermal cycle in air. (A) heating from room temperature to 450 ° C. in about 5 seconds, (b) 45
Constant temperature heating at 0 ° C. for 60 seconds, (c) cooling from 450 ° C. to 350 ° C. in about 2 seconds, (d) constant temperature heating at 350 ° C. for 30 seconds,
(E) Natural cooling to room temperature over about 2 seconds.

The samples thus treated were subjected to a mercury release test by induction heating in a vacuum chamber at 850 ° C. for 30 seconds and measuring the mercury remaining in the mercury donor through a chelate titration method according to Volhart.

Table 1 shows the test results. Table 1 shows the mercury-donating compound A and the mercury evaporation promoting material B (the indications (i) and (l) in Examples 8 and 9 show the compositions of the Cu—Sn—MM alloy as shown in the ternary diagram of FIG. ), The weight ratio of components A and B and the yield of mercury released as a percentage based on the total amount of mercury donor. Comparative examples are marked with *.

[0039]

[Table 1]

Examples 10 to 14 Examples 10 to 14 relate to tests on the mercury donor of the present invention and the comparative examples to investigate the function of the residue remaining after mercury release as a getter material.
This test was performed by simulating the frit conditions experienced during the bending and sealing of a small circular fluorescent lamp.
This condition is more severe than that reached for the straight lamp case. Specifically, the materials of these examples were subjected to the following thermal cycle in air: (a) heating from room temperature to 600 ° C. in about 10 seconds, (b) 6
Constant temperature heating at 00 ° C for 15 seconds, (c) spontaneous cooling to room temperature in about 2 minutes.

A mercury release test (activation) was performed after simulating frit sealing of the sample. The fritted sample was introduced into a vacuum chamber having a volume of 1 liter and
Heat under vacuum at 50 ° C. for 10 seconds and bring to this temperature 20
Maintained for seconds.

The ability of the residue to act as a getter was measured after activation. This measurement was carried out in a room at a temperature of 30.degree.
This was done by introducing an amount of hydrogen to give a pressure of 1 mbar and measuring the time required for the pressure in the chamber to decrease to 0.01 mbar. The pressure was measured with a capacitive manometer. The results of these tests are summarized in Table 2. Table 2 shows the composition of the sample and the hydrogen adsorption rate at 30 ° C. The column of sample composition shows the weight composition of the component materials. Comparative examples are marked with *.

[0043]

[Table 2]

From the data in Table 1, it can be seen that mercury donors using the mercury evaporation promoters of the present invention are capable of yielding over 80% mercury during the activation stage even after frit sealing in air at 450 ° C. It should be noted that it is possible to reduce the total amount of mercury introduced into the electron tube.

Furthermore, as shown by the data in Table 2, the residue remaining after mercury release has a gettering action. That is, in the case of Ti ₃ Hg alone, the residue remaining after mercury release has no getter function, but the sample of Example 13 to which no getter is added exhibits a remarkable hydrogen adsorption rate. In addition, sample 12 has a hydrogen adsorption rate comparable to the sample of Example 11, which is a combination of getter and mercury donor widely used by lamp manufacturers.

When getter material is added to the combination of Example 12, the hydrogen adsorption rate is almost twice that of Example 11, which is the same getter%. This property of the mercury donor of the present invention allows the use of very little additional getter material or the need for getter material while retaining its function.

[0047]

The mercury donor using the mercury evaporation promoter of the present invention enables a mercury yield of over 80% during the activation stage even after frit sealing in air at 450 ° C.,
The total amount of mercury introduced into the electron tube can be reduced. The residue remaining after mercury release has a gettering effect. This property of the mercury donor of the present invention allows the use of very little additional getter material or the need for getter material while retaining its function. The mercury donor using the mercury evaporation enhancer of the present invention offers another important benefit of providing the possibility of performing the activation operation at lower temperatures or for shorter times permitted by conventional materials. Indeed, for an industrially acceptable activation time, Ti ₃ Hg alone requires an activation temperature of about 900 ° C., while the mercury donor of the present invention reduces the operating time for lamp manufacture and The size of the line can be reduced. In both cases, the dual benefit of reducing the contamination required inside the electron tube by degassing all the materials present therein and the energy required for activation is realized.

[Brief description of the drawings]

FIG. 1 is a perspective view of a specific example of a mercury donor of the present invention.

FIG. 2 shows a specific example of the mercury donor of the present invention, and (a)
Is a top view and (b) is a cross-sectional view along the line II-II.

FIG. 3 shows another specific example of the mercury donor of the present invention;
(A) is a top view and (b) and (c) are III-
It is sectional drawing in two types along the III line.

FIG. 4 is a ternary composition diagram (% by weight) of the alloy of the present invention.

[Explanation of symbols]

 10, 20, 30 Mercury donor 21 Support (ring) 31 Support (strip)

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01J 61/24 H01J 61/26

Claims (6)

(57) [Claims] And 1. A (A) of mercury, and titanium, zirconium and mercury donating intermetallic compound component A and a second metal selected from the group consisting of mixtures thereof, and (B) copper,
Tin and, and mercury donor material containing a promoting material component B made of an alloy or intermetallic compound containing <br/> with one or more metals from among the rare earth elements. 2. A (A) of mercury, and titanium, zirconium and mercury donating intermetallic compound component A and a second metal selected from the group consisting of mixtures thereof, and (B) copper,
Tin and, and mercury donor having mercury donor material containing a promoting material component B made of an alloy or intermetallic compound containing <br/> with one or more metals from among the rare earth elements. 3. The mercury donor according to claim 2, wherein the components A and B are accommodated in a metallic support having an annular groove shape. 4. The mercury donor according to claim 2, wherein the components A and B are pressed on the surface of a support having a strip shape. 5. The mercury donor according to claim 2, further comprising a getter material C. 6. introducing an electronic tube which is open mercury donor of any one of claims 2-5, 10 seconds sealing after mercury donor electron tube at a temperature in the range of 600 to 900 ° C. ~ A method of introducing mercury into an electron tube that emits mercury by heating for a period of one minute.