CN100580850C - Manufacturing method for ceramic metallic halogen lamp monomer electric arc pipe shell - Google Patents
Manufacturing method for ceramic metallic halogen lamp monomer electric arc pipe shell Download PDFInfo
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- CN100580850C CN100580850C CN200710031284A CN200710031284A CN100580850C CN 100580850 C CN100580850 C CN 100580850C CN 200710031284 A CN200710031284 A CN 200710031284A CN 200710031284 A CN200710031284 A CN 200710031284A CN 100580850 C CN100580850 C CN 100580850C
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Abstract
A manufacture method of a ceramic metal halide lamp monomer arc tube shell comprises adding high-purity alumina ceramic powder into oleic acid, dry-grinding, adding binder, stirring to prepare uniform bubble-free slurry, injecting the slurry into a metal mold cavity, and cooling to obtain a half hollow arc tube shell blank cross-cut along the axial direction, tightly connecting the surfaces of two half blanks cross-cut along the axial direction, heating the connection surface by an annular heater to soften the binder in the material at the connection surface and increase the viscosity to ensure compact and seamless bonding between the two half blanks, subjecting to wav removal treatment, and high-temperature sintering to obtain the single integrated semi-transparent alumina ceramic arc tube shell. The inventive half blank is formed by hot-pressing injection and has good uniformity. The two half hollow blanks are bonded together via local heating, the inner core material is saved, the bonding surface is integrated as a whole, and no seam is present after formation. Accordingly, the invention obviates the use of volatile inner core, and has simple process, low cost and no pollution.
Description
Technical field
The present invention relates to a kind of manufacture method of ceramic gold-halogen lamp, be meant a kind of manufacture method of ceramic metallic halogen lamp monomer electric arc pipe shell especially.
Background technology
Ceramic gold-halogen lamp is owing to there being excellent electro-optical properties to become the new lamp kind that the lighting field people extremely pay close attention to, and why ceramic gold-halogen lamp can obtain very big development in recent years, and an important reasons is the breakthrough of single integrated ceramic electric arc pipe shell manufacturing technology.
Early stage ceramic arc shell is to be combined by several columniform ceramic components, adopt corrosion resistant glass solder to form between each parts and connect through high temperature bond, but this multistage compound mode because of complex process, reliability is low, cost is high is eliminated gradually.
The most advanced structure that single integrated elliposoidal electric arc shell is an electric arc pipe shell in the present ceramic gold-halogen lamp, it has overcome the shortcoming of early stage ceramic arc shell, and the electro-optical properties of lamp and life-span are greatly improved.To this, many patents have also been produced.Wherein, the patented technology that really has an industrialization meaning mainly contains following two kinds.First utilization can be made inner core as graphite, organic substance etc. at the material of vaporization at high temperature, injects ceramic size with injection molding method then, treats to remove inner core material by the method for high-temperature oxydation again after slurry solidifies, and obtains hollow ceramic body; This method is very strict to the removal technological requirement of inner core material when operation, if the remaining transparency that will influence shell of carbonaceous is arranged slightly, and complicated technological requirement has also increased considerably cost; This type of technology is shown in patent of invention CN1489558A and CN1251330A.
It two is to produce two half of biscuiting base substrates that diameter is different in advance, and the different shrinkages when again they closely being inlayed the back by high temperature sintering and sintering are together; In fact strict, this method belongs to the two-period form structure, and is very strict to the fit dimension and the sintering shrinkage requirement of two half of base substrates, otherwise can form the gap at seam crossing after burning till, the product rejection that causes poor sealing to cause, so the rate of finished products of this method is very low.So it is very necessary to seek a kind of more simple and feasible, low cost, free of contamination manufacture method.
Summary of the invention
The problem that the present invention need solve provides and does not a kind ofly adopt the volatility inner core, technology is simple, cost is low, the manufacture method of free of contamination integrated ceramic metallic halogen lamp electric arc pipe shell.
Designed a kind of manufacture method of ceramic metallic halogen lamp monomer electric arc pipe shell according to the above-mentioned problem that need to solve, comprised the steps:
One is with high purity aluminium oxide Al
2O
3Ceramic powder adds water for ball milling to average grain diameter Φ≤1 micron, dry for standby; Two, oleic acid (the molecular weight: 282.47) that in described ceramic powder, adds 0.2-0.5%wt by grain weight, after ball mill for dry grinding 4-6 hour, add the adhesive of 15～20%wt again by grain weight, be heated to 70～110 ℃ and stir into even bubble-free slurry then; Three, adopt the hot pressing molding process, the slurry for preparing in second step is advanced with form of compressed air injection in the cavity of metal die, can take out the half of hollow arc tube shell base substrate of double crosscut vertically after the condensation; Four, will be in the 3rd step after the cross section closed butt joint vertically of in type half of electric arc pipe shell base substrate, in 60～100 ℃ of temperature ranges, interface heated so that the adhesive in the interface place material is softening and viscosity increases with heater, guarantee that by the mutual fusion between contact-making surface the two halves base substrate realizes tight seamless binding; Five, with bonding base substrate be embedded in be warmed up in the coarse grain alumina powder 1000～1200 ℃ make de-waxing and handle after, remove the residual aluminium powder of billet surface, again in 1～5 * 10
-3After 2～4 hours, can obtain single integrated TRANSLUCENT ALUMINA CERAMIC ARC TUBE shell at sintering under 1700～1900 ℃ the high temperature in the flowing hydrogen stove of the vacuum of MPa or 0.02～0.05MPa.
As further improvement to the aforementioned techniques scheme, in described aluminium oxide ceramics powder, also contain magnesium oxide, the yittrium oxide of 0.2～0.5%wt by weight, the additive package of lanthana, the ratio between magnesium oxide, yittrium oxide, lanthana is 1: 2: 1.
Wherein, producing adhesive used in the process at slurry is made up of polyvinyl alcohol 5～10%wt, paraffin 90～95%wt by weight.In addition, two half of hollow arc tube shell base substrates only carry out localized heating to bonded areas after bonding, and described heater is the ring heater that the profile of shape and electric arc tube base substrate is complementary.Simultaneously, making in the process of local heating carrying out bonding electric arc tube base substrate of described heater, the compressed air that will charge into 0.02～0.05MPa in the inside of described hollow base substrate prevents blank deformation as support.
Compared with prior art, half of base substrate of the present invention is shaped by the hot pressing injection molding, and the size of base substrate is determined by metal die, high conformity; Single base substrate has been saved inner core material by two bonding forming of the hollow base substrate localized heating of one side of something in the course of processing; Because of being seamless binding between two half of base substrates, bonding plane combines together, does not have the gap after burning till.Therefore, the present invention has realized not adopting the volatility inner core, technology is simple, cost is low, free of contamination invention aim.
Description of drawings
Embodiment
Below in conjunction with accompanying drawing invention main points of the present invention and implementation method are described in further detail.
What the present invention relates to is a kind of manufacture method of ceramic metallic halogen lamp monomer electric arc pipe shell, comprises the steps:
It at first is preparation aluminium oxide ceramics powder.In order to suppress grain growth, increase the transparency of manufactured goods, in alumina powder, mix magnesium oxide, the yittrium oxide of 0.2～0.5%wt, the additive package of lanthana by weight, the ratio between magnesium oxide, yittrium oxide, lanthana is 1: 2: 1.The purity of described whole raw materials should be greater than 99.9%, and average grain diameter is less than 1 micron, after adding water for ball milling and mixing, and dry for standby.
Next is a preparation hot pressing injection molding slurry.In aforesaid ceramic powder, add 0.2～0.5%wt, molecular weight and be 282.47 oleic acid, after 4～6 hours, add the adhesive of 10～25%wt again by grain weight, be heated to 70～110 ℃ and stir into even bubble-free slurry then in ball mill for dry grinding; Producing adhesive used in the process at slurry is made up of polyvinyl alcohol 5～10%wt, paraffin 90～95%wt by weight.
The 3rd adopts the hot pressing molding process.The slurry of preparation in second step is advanced with form of compressed air injection in the cavity of metal die, can take out the half of hollow arc tube shell base substrate 1 of double crosscut vertically after the condensation, as shown in Figure 1.
The 4th, will the 3rd the step in the cross section closed butt joint vertically of in type half of electric arc pipe shell base substrate, show as Fig. 2.During butt joint, in 60～100 ℃ of temperature ranges, interface heated so that the adhesive in the interface place material is softening and viscosity increases, guarantee that by promoting mutual fusion between contact-making surface the two halves base substrate realizes tight seamless binding with heater.Indeformable when bonding in order to guarantee described base substrate, as only to adopt localized heating mode and described heater 2 to be complementary ring heater for the profile of shape and electric arc tube base substrate; Simultaneously, doing in the process of heating carrying out bonding electric arc tube base substrate, the compressed air that also will charge into 0.02-0.05MPa in the inside of described hollow base substrate prevents blank deformation as support.
At last, bonding base substrate is embedded in 60 purpose coarse grain alumina powders, in be warmed up at a slow speed 1000～1200 ℃ make de-waxing and handle after, remove the residual aluminium powder of billet surface, again in 1～5 * 10
-3After 2～4 hours, can obtain single integrated TRANSLUCENT ALUMINA CERAMIC ARC TUBE shell at sintering under 1700～1900 ℃ the high temperature in the flowing hydrogen stove of the vacuum of MPa or 0.02～0.05MPa.
Below be indefiniteness embodiment of the present invention, concrete raw material ratio and parameter can be regulated according to concrete condition on the spot, the method for operation unanimity.Generally speaking, the variation of raw material ratio and operating parameter does not have substantial effect to end results of the present invention.
Get 99.5% aluminium oxide ceramics powder by weight percentage, and to the magnesium oxide that wherein mixes 0.5%wt, yittrium oxide and lanthana additive package, and after adding water for ball milling and mixing, the oleic acid that adds 0.5%wt, dry grinding evenly adds the adhesive of 10%wt (adhesive is with paraffin: the percentage by weight ratio preparation of polyvinyl alcohol=95: 5), stir into uniform no bubble slurry being heated under 90 ℃ the condition then in the back again.Then adopt the hot pressing molding process that the slurry that makes is advanced to make half of hollow arc tube shell base substrate in the metal die cavity with form of compressed air injection.Next step docks bonding to two half of hollow arc tube shell base substrates, with ring heater interface is heated, 80 ℃ of heating-up temperatures closely seamlessly bond together two half of base substrates, will notice that certainly liner promptly supports problem to prevent blank deformation.At last, bonding base substrate imbedded in burnt coarse granule alumina powder be warmed up to 1100 ℃ at a slow speed, after being incubated 1 hour and doing de-waxing and handling, remove the aluminium powder on surface, put into vacuum or hydrogen furnace again in 1800 ℃ of high temperature sinterings 2 hours, promptly obtain required single integrated TRANSLUCENT ALUMINA CERAMIC ARC TUBE shell.
Claims (6)
1, a kind of manufacture method of ceramic metallic halogen lamp monomer electric arc pipe shell comprises the steps
One, the aluminium oxide ceramics powder is added evenly back dry for standby of water for ball milling;
Two, in described ceramic powder, add the oleic acid of 0.2%wt～0.5%wt by grain weight, even in ball mill for dry grinding, add the adhesive of 10～25%wt again by grain weight, be heated to 70～110 ℃ and stir into even bubble-free slurry then;
Three, adopt the hot pressing molding process, the slurry for preparing in second step is advanced with form of compressed air injection in the cavity of metal die, can take out the half of hollow arc tube shell base substrate of double crosscut vertically after the condensation;
Four, will be in the 3rd step after the cross section closed butt joint vertically of in type half of electric arc pipe shell base substrate, in 60～100 ℃ of temperature ranges, interface heated so that the adhesive in the interface place material is softening and viscosity increases with heater, guarantee that the two halves base substrate realizes tight seamless binding;
Five, with bonding base substrate be embedded in be warmed up in the coarse grain alumina powder 1000～1200 ℃ make de-waxing and handle after, remove the residual aluminium powder of billet surface, again in 1～5 * 10
-3After 2～4 hours, promptly obtain single integrated TRANSLUCENT ALUMINA CERAMIC ARC TUBE shell at sintering under 1700～1900 ℃ the high temperature in the flowing hydrogen stove of the vacuum of MPa or 0.02～0.05MPa.
2, the manufacture method of ceramic metallic halogen lamp monomer electric arc pipe shell according to claim 1, it is characterized in that also containing the additive package of magnesium oxide, yittrium oxide and the lanthana of 0.2～0.5%wt by weight in the described aluminium oxide ceramics powder, the ratio between magnesium oxide, yittrium oxide, lanthana is 1: 2: 1; The molecular weight of described oleic acid is 282.47.
3, the manufacture method of ceramic metallic halogen lamp monomer electric arc pipe shell according to claim 2 is characterized in that described adhesive is made up of polyvinyl alcohol 5～10%wt and paraffin 90～95%wt by weight.
4, the manufacture method of ceramic metallic halogen lamp monomer electric arc pipe shell according to claim 3 is characterized in that two half of hollow arc tube shell base substrates after bonding, only carry out localized heating to bonded areas.
5, the manufacture method of ceramic metallic halogen lamp monomer electric arc pipe shell according to claim 4 is characterized in that the structure of heater is annular, and the profile of its shape and electric arc tube base substrate is complementary.
6, the manufacture method of ceramic metallic halogen lamp monomer electric arc pipe shell according to claim 5, it is characterized in that to charge into the compressed air of 0.02～0.05MPa as support in the inside of described hollow base substrate making in the process of heating carrying out bonding electric arc tube base substrate of described heater.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710031284A CN100580850C (en) | 2007-11-03 | 2007-11-03 | Manufacturing method for ceramic metallic halogen lamp monomer electric arc pipe shell |
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| CN200710031284A CN100580850C (en) | 2007-11-03 | 2007-11-03 | Manufacturing method for ceramic metallic halogen lamp monomer electric arc pipe shell |
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| CN100580850C true CN100580850C (en) | 2010-01-13 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102249695B (en) * | 2011-05-12 | 2013-07-31 | 厦门虹鹭钨钼工业有限公司 | Manufacturing method of arc tube for ceramic metal halide lamp |
| CN102424567B (en) * | 2011-08-31 | 2015-02-18 | 廊坊力泰道路设施制造有限公司 | Manufacturing method of ceramic tube for high-pressure gas discharging lamp |
| CN103073271A (en) * | 2011-11-18 | 2013-05-01 | 常熟市创新陶瓷有限公司 | High-abrasion-resistance high-temperature-resistance ceramic |
| CN103922754B (en) * | 2014-03-12 | 2016-02-17 | 沈阳三友照明科技有限公司 | A kind of manufacture method of ceramic cartridge |
| CN105108883B (en) * | 2015-08-31 | 2018-02-09 | 佛山市佛冠义齿有限公司 | A kind of filling forming method of ceramic product |
| CN105693255A (en) * | 2016-02-04 | 2016-06-22 | 广东工业大学 | Method for producing transparent ceramic component by injection molding |
| CN107379213B (en) * | 2017-08-03 | 2022-08-16 | 沈阳明煜光源科技有限公司 | Cutting-free semitransparent ceramic bulb shell preparation and butt-joint forming method and device |
| CN116332655A (en) * | 2023-03-28 | 2023-06-27 | 湖南圣瓷科技有限公司 | Ceramic arm and preparation method and application thereof |
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