CN101053052A - 制备放电灯的方法 - Google Patents

制备放电灯的方法 Download PDF

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CN101053052A
CN101053052A CNA2005800035067A CN200580003506A CN101053052A CN 101053052 A CN101053052 A CN 101053052A CN A2005800035067 A CNA2005800035067 A CN A2005800035067A CN 200580003506 A CN200580003506 A CN 200580003506A CN 101053052 A CN101053052 A CN 101053052A
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K·-D·鲍尔
F·福尔科默
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PATRA Patent Treuhand Munich
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Abstract

本发明涉及一种制备放电灯的方法，其具有下列步骤：制备放电容器，由组分即粉末状基质材料、作为粘合剂的聚亚烷基碳酸酯和溶剂，制备用于功能性层的膏状物、通过将膏状物涂于该放电容器的至少部分壁上以形成功能性层。该基质材料的种类依功能性层的种类如荧光层(3)、反射层(4)或玻璃焊料层(5)而定。聚亚烷基碳酸酯作为粘合剂的应用可在较低的脱粘合剂温度下实现无残渣脱粘合剂，由此可制备高效灯。

Description

制备放电灯的方法
技术领域
本发明涉及一种制备放电灯，特别是介电势垒-放电灯(Barriere-Entladungslampe)的方法。
放电灯依其类型具有一层或多层功能性层，例如在荧光灯具有发光物质层或孔径灯还具有反射层。此外，对介电势垒灯即基于所谓的介电受阻放电运行的灯，只要在放电容器内安置有电极(内电极)，则需要介电层如玻璃焊料层，该玻璃焊料层将内电极与放电介质隔开。此外，该玻璃焊料层还用于平面放电灯的各容器部件的气密接合，例如在第一容器板上涂敷框形玻璃焊料层，然后与第二容器板熔合。
为在平面放电灯情况下如借助于压涂或喷涂工艺涂敷这类层，首先要将呈粉末状的基质材料即如发光物质、反射物质或玻璃焊料与粘合剂和溶剂相混合成膏状物。该膏状物的粘度特别是受该溶剂的选用类型和其含量影响，并依各层所用的涂敷工艺如丝网印刷、喷涂或散涂而定。问题是各层粘合剂的无残渣排除，即所谓的脱粘合剂，该脱粘合剂在充填放电介质和气密性密封前是必须进行的。因此无残渣脱粘合剂是重要的，因为该放电介质必需保持尽可能地纯，以确保无干扰和高效的灯运行以及长的灯寿命。脱粘合剂通常通过加热经涂敷的部件或已预制成的灯容器和例如通过气流、抽真空等带出所挥发的粘合剂成分来实现。这时必需选用相应于所用粘合剂的加热时间和高温，以保证无残渣脱粘合剂。但是高温也会有害于发光物质。此外，该所用玻璃和玻璃焊料的软化温度还必须明显高于该脱粘合剂温度。
现有技术
文献EP 1239507 A1公开了一种制备基于介电受阻放电的平面荧光灯的方法，其中喷涂该发光物质层。为此所用的稀的发光物质悬浮液由达40-60重量％的荧光物质、达1-5重量％的有机粘合剂如乙基纤维素或硝基纤维素、以及溶剂如乙醇、萜品醇或2-(2-丁氧基乙氧基)乙酸乙酯(BCA)组成。
发明描述
本发明的目的在于提供一种鉴于涂敷功能性层改进的方法用以制备放电灯。
本发明的目的是通过具有下列方法步骤的制备放电灯的方法实现的：
a.制备放电容器，
b.由下列组分制备用于功能性层的膏状物：
·粉末状基质材料，
·聚亚烷基碳酸酯粘合剂，
·溶剂，
c.通过将膏状物涂于该放电容器的至少部分壁上以形成功能性层，
d.如拟定有多于一层的功能性层，则任选地重复步骤b和c。
特别有利的方案列于从属权利要求中。
所用的粉末状基质材料依应涂敷何种功能性层而定。为形成发光层(Leuchtstoffschicht)该粉末状基质材料由发光物质或发光物质混合物组成，为形成反射层该粉末状基质材料由反射材料如Al2O3或TiO2或反射物质混合物或由两种或多种反射层的杂混而组成，为形成作为功能性层的介电层该粉末状基质材料由玻璃焊料(Glaslot)如Pb-B-Si-O或玻璃焊料混合物组成。
作为粘合剂所用的聚亚烷基碳酸酯包括两种方案即聚碳酸乙烯酯和聚碳酸丙烯酯，其例如由Empower Materials公司以牌号QPAC 25或QPAC 40出售的产品。粘合剂聚亚烷基碳酸酯在膏状物总重量中所占的重量份为约0.1-5％，特别是0.5-3％，尤其是0.5-2％是合适的。应用QPAC的优点特别在于在较低温度即约250-300℃即可实现无残渣脱粘合剂。由此一方面可顺利制得在放电容器内有高纯度的灯。另一方面由此增加了其软化温度高于脱粘合剂温度的合适的玻璃焊料的选用。
作为溶剂可考虑应用如乙酸乙酯和/或丙二醇二乙酸酯(PGDA)。溶剂或混合物的选用在各具体情况下依据该制成的悬浮液的所需喷涂特性、润湿性能和流出特性以及该溶剂的优选蒸发速度而定。而这些特性还要按待涂的原材料的形式而定。
附图简介
下面以实施例详述本发明。附图是：
图1a示出一种平面式介电势垒-放电灯的放电容器的底板和面板的截面图，
图1b示出底板的局部放大图，
图1c示出面板的局部放大图，
图2如图1，但示出其接合状态。
本发明优选实施方式
在图1a-2所示出的实施例涉及制备一种平面式介电势垒-放电灯，该平面式介电势垒-放电灯的放电容器基本由平面式底板1和波节式面板2组成。对此可参阅文献US 2002/0163311A1和WO 03/017312，其中已公开了这种灯和其制备方法。
图1示出平面式底板1，其上置有波节式面板2，然后该两板相互气密式粘合成放电容器。但首先该具有US 2002/0163311中所公开的”波节结构”的面板2的内侧面有三带发光层(Dreibandenleuchtstoffschicht)3(在图1a中未示出；参见图1b的放大图)。为此目的将达30重量％的该三种粉末状的发光材料组分即钡镁铝酸盐(BaMgAl10O17:Eu)、磷酸镧(LaPO4:(Tb，Ce))和钆钇硼酸盐((Gd，Y)BO3:Eu)与1.3重量％的QPAC 40、55.7重量％的PGDA和13重量％的乙酸乙酯混合，接着喷涂到面板2上。通过上述发光材料-悬浮液的特定组成可达到所需的喷涂性能、润湿性能和流出性能(Ablaufverhalten)，这些性能是均匀涂敷该所述面板2的波节结钩的前提。在平面式底板1的内侧面上首先涂敷反射层4，在反射层4上涂敷相应于面板2上的三带发光层3(在图1a中未示出；参见图1c的放大图)。该发光层和该仅射层的层重为约3mg/cm2或10mg/cm2。对于该反射层4，制备并涂敷由35重量％的Al2O3、1.5重量％的QPAC 40和63.5重量％的PGDA形成的混合物。此外，在底板1上涂敷呈框形围绕其外周边的玻璃焊料带5(见图1a)。对此应用由81重量％的粉末状Pb-B-Si-O玻璃焊料、1重量％的QPAC 40和18重量％的PGDA形成的混合物。经干燥后该层3-5在280℃下于通气流的炉(未示出)中脱粘合剂1小时。之后，将该底板1和面板2在放电介质气氛，这里即纯氙气中进行气密性接合，这时框形玻璃焊料层5经加热软化。该放电容器经接合后，还在底板1的外侧面上涂敷电极带(未示出)。详情还可参阅已引用的WO 03/017312。
对具有内电极的介电势垒-放电灯的情况，用于将电极与放电介质隔开所需的介电层可通过以上述同样方法涂敷相应的玻璃焊料层实现。
尽管以前述的制备平面式介电势垒-放电灯的实施例详述了本发明，但本发明的有利效果和要求的保护可扩展到按本发明制成具有其它造形的放电容器的放电灯，特别是管式放电灯以及具有通常的即非介电受阻电极的放电灯。

Claims (14)

1.制备放电灯的方法，其具有下列步骤：
a.制备放电容器，
b.由下列组分制备用于功能性层的膏状物：
·粉末状基质材料，
·作为粘合剂的聚亚烷基碳酸酯，
·溶剂，
c.通过将膏状物涂于该放电容器的至少部分壁上以形成功能性层，
d.如拟定有多于一层的功能性层，则任选地重复步骤b和c。
2.权利要求1的方法，其中，该粉末状基质材料由发光物质或发光物质混合物组成，用以形成发光层(3)作为功能性层。
3.权利要求2的方法，其中，该发光材料或发光混合物包括选自BaMgAl10O17:Eu、LaPO4:(Tb，Ce)、(Gd，Y)BO3:Eu的一种或多种成分。
4.权利要求1-3之一的方法，其中，该粉末状基质材料由反射物质或反射物质混合物组成，用以形成反射层(4)作为功能性层。
5.权利要求4的方法，其中，该反射物质或反射物质混合物包括Al2O3和/或TiO2。
6.上述权利要求之一的方法，其中，该粉末状基质材料由玻璃焊料或玻璃焊料混合物组成，用以形成玻璃焊料层5)作为功能性层。
7.权利要求6的方法，其中，该玻璃焊料或玻璃焊料混合物包括Pb-B-Si-O。
8.上述权利要求之一的方法，其中，该溶剂包括乙酸乙酯。
9.上述权利要求之一的方法，其中，该溶剂包括丙二醇二乙酸酯。
10.上述权利要求之一的方法，其中，粘合剂聚亚烷基碳酸酯的重量份为约0.5-2％，特别是1-1.5。
11.上述权利要求之一的方法，其中，作为粘合剂应用的聚亚烷基碳酸酯是聚碳酸丙烯酯。
12.上述权利要求之一的方法，其中，通过喷涂、散涂或丝网印刷涂敷该膏状物。
13.上述权利要求之一的方法，其中，该放电灯呈平面式放电灯，并且该放电容器由两个相互气密式接合的基本呈平面的板(1，2)所组成。
14.上述权利要求之一的方法，其中，该放电灯设计成基于介电受阻放电运行。
CN2005800035067A 2004-01-28 2005-01-14 制备放电灯的方法 Expired - Fee Related CN101053052B (zh)

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WO2005073999A3 (de) 2007-04-19
JP4372159B2 (ja) 2009-11-25
WO2005073999A2 (de) 2005-08-11
CA2554454A1 (en) 2005-08-11
KR101101688B1 (ko) 2011-12-30
JP2007524200A (ja) 2007-08-23
KR20060131843A (ko) 2006-12-20
TWI285391B (en) 2007-08-11
EP1709662A2 (de) 2006-10-11

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