CN1332061C

CN1332061C - Quick steaming container

Info

Publication number: CN1332061C
Application number: CNB001350625A
Authority: CN
Inventors: J·M·莫里斯
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 2000-12-14
Filing date: 2000-12-14
Publication date: 2007-08-15
Anticipated expiration: 2020-12-14
Also published as: CN1358880A

Abstract

The present invention relates to a resistance heating quick evaporation device for quickly evaporating metallic packing in a finite region. The resistance heating quick evaporation device has an approximate U-shaped geometric configuration. The resistance heating quick evaporation device is provided with opposite ends and an upper part. A drop pit for accommodating the metallic packing is arranged on the upper part and two legs extending downward from the opposite ends of the resistance heating quick evaporation device are arranged on the upper part. The cross-section dimension of each leg best adjacent to the drop pit is obviously less than the cross-section dimension of a part of each leg which is retracted backward, and thus, a big opening area is formed below the drop pit.

Description

Quick steaming container

Invention field

The present invention relates to be used for the particularly quick steaming container of aluminium of evaporated metal.More particularly, the present invention relates to for example be used in ray projection tube (Projection RayTube) (" the PRT ") neck resistive heating quick steaming container of evaporation source metallic aluminium a limited area.

Background technology

At present, aluminum metal is all carried out flash distillation on the internal surface of large-screen projection system.More properly saying, is flash distillation on the internal surface of " PRT " ray projection tube, in this pipe, uses tungsten filament image to be projected the opposite of screen.Place an aluminum shot on the open end of tungsten filament.PRT is positioned on the tungsten filament, and at aluminum evaporation (Alumination) before, with its vacuum-sealing.Heat tungsten filament then, make aluminum shot heat to flashing.A neck that diameter is very little is arranged on the ray projection tube, generally be limited in below about 24mm.Because the size of neck is so little, thus other type known resistive heating dodge devices steam comprise the resistive heating quick steaming container or be called " flasher furnace pot " sometimes all can not replace tungsten filament at present.

Common quick steaming container or furnace pot be one by the intermetallic matrix material member made of the mixture of TiB2 and boron nitride or a kind of TiB2, boron nitride and aluminum oxide for example.In addition, the also available graphite body of this member is made.The geometrical shape of common quick steaming container is preferably rectangle, wherein processes a pit, so that admit the metallic stuffing of preparing evaporation.General quick steaming container places contiguous by in the vacuum chamber of coated body surface, and is connected with extraneous power supply by the clip termination that it is opposite.The metallic stuffing flash of light requires good with contacting of clip, and it is also important that the current density that produces in the evaporator boat must so can be elevated to the metallic stuffing in the pit temperature of its evaporation even as big as forming the zone of the enough heat of crossing over pit.

Owing to be used in combination with the ray projection tube, the size of quick steaming container must make its inside that can put into the open neck of PRT pipe, and has enough current densities to make the metallic stuffing flash of light.In addition, the shape of quick steaming container must design to such an extent that the metal ball can automatically be entered in the vessel on the basis of a fabrication line, thereby same flasher can be repeated and use reliably.

Summary of the invention

Furnace pot of the present invention can make metallic stuffing for example repeat flash of light in the extremely narrow zone of the corresponding only 24mm of open neck size of diameter and ray projection tube at one, and very easily is connected with extraneous power supply by a clip.The design of furnace pot of the present invention is that it is inserted in the open neck of a ray projection tube, is settled out uniform layer of aluminum on the portion surface within it by glistening.

According to preferential embodiment of the present invention, vaporizer have a roughly shape of a hoof geometrical configuration, it has opposite edges and a top.A recessed hole is arranged at top, in order to admit metallic stuffing, also has two legs that stretch from the opposite side of vessel downwards.Every leg is the cross-sectional dimension of close pit this part the cross-sectional dimension that will be significantly smaller than that every leg contracts after this.Every outstanding leg near the cross-sectional dimension of pit preferably less than this part the cross-sectional dimension of every leg from this suitable segment distance that contracts along its length, this segment distance at least should be below pit till the position in order to hole that vessel are connected with extraneous power supply on every leg.

The accompanying drawing summary

Other advantages of the present invention will be more obvious having read after the following detailed description of the invention referring to accompanying drawing.Accompanying drawing comprises:

Fig. 1 is the viewgraph of cross-section of furnace pot of the present invention;

Fig. 2 is the vertical view of Fig. 1 furnace pot; With

Fig. 3 is the side-view of Fig. 1 furnace pot.

The present invention's explanation

Common resistance-type furnace pot or ware are generally rectangular, long dimensionally and narrow.It has a pit that processes or groove on one of surface.This pit can be the geometrical shape of any requirement, is used to keep any suitable metal filler that preferably is for example aluminium of ball ball shape.The opposite termination of furnace pot is connected with extraneous power supply by a clip.According to the size and the resistivity thereof of vessel, vessel will provide an impedance circuit.Vessel must be heated to the metallic stuffing that is enough to make in the pit and produce the temperature of flash of light.As desire to make the vessel miniaturization to the narrow region of packing into, just the size of vessel becomes for the major design difficult problem of the current density that is enough to cause flash of light is provided so.

The design of furnace pot of the present invention has overcome the difficult problem in the configuration design of prior art vessel.This vessel minimum or utmost point narrow region of will packing into, the open neck of ray projection tube for example, the diameter dimension of neck has only 24mm by present manufacturing situation.Furnace pot 10 shown in Fig. 1～3 is made of any suitable ceramic material of homogeneity.This material preferably class such as TiB2 and boron nitride the intermetallic binary complex or as the ternary complex of TiB2, boron nitride and aluminium nitride.In addition, vessel 10 can be made of graphite, throw out that also can topped outside one deck pyrolitic boron nitride.The process that forms boron nitride pyrolysis overcoat is very usual.In brief, the ammonia steam and the importing of gaseous state halogenation boron of suitable proportion are equipped with by in the heating reaction furnace of plating vessel 10.Stove keeps under 1800～2200 ℃ controllable temperature.

The shape of vessel 10 is like the shape of a hoof, and it has top 12 and two outstanding legs, is respectively 14 and 15.12

opposite end

16 and 17 stretches downwards

leg

14 and 15 from top, and forms an open seam 18 betwixt.Contain a pit 19 on the top 12, preferably the groove of any appropriate depth that on ware 10 tops 12, processes with cutting process.Pit 19 can be the shape of any requirement, and its size also can optionally change, in order that play a suitable metal filler (not shown) flash of light container.Metallic stuffing can be any metallic substance or alloy, preferably chooses from comprise classes such as aluminium, copper, tin, silver.The shape of top 12 and pit 19 and for example United States Patent (USP) N o.5, the general quick steaming container in 239,612 is identical, and the reference of this patent has been classified in the invention of this patent as.

Hang the best uniformity of cross-sectional dimension of

leg

14 and 15, but except 21 and 22 parts, the cross-sectional dimension of this part must arrive on

leg

14 and 15 one section cross-sectional dimension of going up any part till the corresponding upper surface hole 25 along its length direction at least less than every leg 14 and 15.On every

leg

14 and 15 hole 25 should be arranged at least, but two holes 25 are preferably arranged, be used for vessel 10 are connected with extraneous power supply (not shown), simultaneously preferably by a combination tightening screw (not shown).Porose 25 size can be identical, and before the chuck subassembly with vessel 10 and PRT commonly used is connected, for example matrix material or the graphite below the isolator cladding (if any) of pyrolitic boron nitride comes out earlier.Extraneous power supply (not shown) is striden suitable voltage and is added on the top 12, strides more precisely to be added on the pit 19, so that make the metallic stuffing flash of light.Owing to reduce the cross-sectional dimension of each

part

21 and 22, between pit on the top 12 19 and open seam 18, just form a bigger open area 23.Zone 23 cross-sectional width should with the width dimensions of pit 19 about equally or slightly little.

According to the present invention, discovery is for the ware of a compact in size, the size of 20 and 21 parts plays a crucial role for the performance of vessel 10, simultaneously in vessel 10 tops, producing enough current densities and sufficiently long red-hot district so that make the metallic stuffing pit 19 in glisten also most important.The ratio of the cross-sectional dimension that each

part

21 and 22 cross-sectional dimension and every

leg

14 and 15 record along 25 the length L from open region 23 to upper surface hole will depend on the size of vessel 10, the composition of metallic stuffings in the material of vessel 10 and the pit 19.Therefore the relativeness of the size of 21 and 22 parts and every

leg

14 and 15 cross-sectional dimension can alter a great deal.The size of vessel 10 must be sufficiently little shown in Fig. 1～3, itself and aluminum metal filler can be filled in together the open neck that is generally 24mm of ray projection tube.So the preferred size of purposes is: wide 16mm, dark 6mm and total length (comprising that leg is long) 40mm.Length L is 8mm, and every

leg

14 and 15 width are 7mm, and the width of seam 18 is 2mm, and the width of open region 23 is 10mm, and the cross-sectional area of open region 23 is 40mm ²The width of pit 19 is 12mm.The material of furnace pot 10 is preferably the ceramic composite of TiB2, boron nitride and aluminium nitride.The cross-sectional dimension that reduces on 21 and 22 parts and be positioned under the

district

21 and 22 along the ratio of every leg 14 of length L and 15 cross-sectional dimension and should be roughly 1: 3 or bigger is so that produce enough current densities.

Claims

1. miniaturization furnace pot that is used for flash distillation metallic stuffing in limited area, comprise one and have the roughly homoplasmon of shape of a hoof geometrical configuration, has opposite two ends and a top, one pit is arranged at described top, be used to hold the metallic stuffing that will be evaporated, also have two outstanding shanks, stretch downwards from described opposite two ends, the cross-sectional dimension of every shank of close this pit is significantly less than the cross-sectional dimension of every shank when it contracts after this, thereby forms a big open region below this pit.

2. by the described miniaturization furnace pot of claim 1, it is characterized in that described metallic stuffing is selected from one group of metal that comprises aluminium, copper, tin and silver.

3. by the described miniaturization furnace pot of claim 2, it is characterized in that described homoplasmon is made of the intermetallic binary complex of TiB2 and boron nitride or the ternary complex of TiB2, boron nitride and aluminium nitride; Also can constitute by graphite or at the throw out of its appearance coated one deck pyrolitic boron nitride.

4. by the described miniaturization furnace pot of claim 3, the cross-sectional dimension that it is characterized in that every leg is a uniformity, but except the zone of close pit.

5. by the described miniaturization furnace pot of claim 4, it is characterized in that the cross-sectional dimension of close pit and the ratio of every leg rest part uniform cross-sectional area size are 1: 3 or bigger to every leg.

6. by the described miniaturization furnace pot of claim 5, it is characterized in that every leg comprises a hole at least, be suitable for described vessel are connected with an extraneous power supply.

7. by the described miniaturization furnace pot of claim 6, it is characterized in that having on every leg two holes of predetermined distance at interval, be suitable for described vessel are connected with an extraneous power supply.

8. by the described miniaturization furnace pot of claim 4, it is characterized in that the width of described big open region and the width of pit equate.