WO2018146644A1 - 一种耐大浪涌电流冲击的压敏电阻的制备方法及压敏电阻 - Google Patents

一种耐大浪涌电流冲击的压敏电阻的制备方法及压敏电阻 Download PDF

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WO2018146644A1
WO2018146644A1 PCT/IB2018/050843 IB2018050843W WO2018146644A1 WO 2018146644 A1 WO2018146644 A1 WO 2018146644A1 IB 2018050843 W IB2018050843 W IB 2018050843W WO 2018146644 A1 WO2018146644 A1 WO 2018146644A1
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Prior art keywords
varistor
zinc oxide
preparing
binder
glass
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French (fr)
Inventor
程微
李其荣
杨文�
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TDK Electronics AG
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Epcos AG
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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C7/00Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/105Varistor cores
    • H01C7/108Metal oxide
    • H01C7/112ZnO type
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C17/00Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/06Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C17/00Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/06Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base
    • H01C17/065Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick film techniques, e.g. serigraphy
    • H01C17/06506Precursor compositions therefor, e.g. pastes, inks, glass frits or green body
    • H01C17/06513Precursor compositions therefor, e.g. pastes, inks, glass frits or green body characterised by the resistive component
    • H01C17/06533Precursor compositions therefor, e.g. pastes, inks, glass frits or green body characterised by the resistive component composed of oxides
    • H01C17/06546Oxides of zinc or cadmium
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C17/00Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/06Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base
    • H01C17/075Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thin-film techniques
    • H01C17/12Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thin-film techniques by sputtering
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C17/00Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/30Apparatus or processes specially adapted for manufacturing resistors adapted for baking
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C7/00Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C7/00Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/102Varistor boundary, e.g. surface layers

Definitions

  • the present invention relates to the field of varistor production, and more particularly to surge suppression type varistors.
  • varistor on the market selects different diameters or models according to the set current impact requirements during use. Often, the overvoltage or surge current in the circuit exceeds the design specifications of the varistor in practical applications. Causes failure breakdown of the varistor or damage to the circuit equipment.
  • a varistor with a larger flow area and a higher level of protection is selected instead of or using a combination of two or more varistors.
  • these two methods have high production costs, are large in size, and are inconvenient to use.
  • the object of the present invention is to provide a method for preparing a varistor resistant to large surge currents and a varistor without increasing the size of the varistor or increasing the number of varistor. Next, improve the product's ability to withstand surge currents
  • a method for preparing a varistor resistant to large surge current surges comprising the steps of: Step 1: coating the conductive electrode material on the zinc oxide varistor sheet to obtain a zinc oxide varistor sheet with a conductive electrode layer;
  • Step 2 preparing a slurry for a glass protective layer comprising a lanthanide glass powder, and coating the glass protective paste on the zinc oxide varistor sheet with the conductive electrode layer of the first step;
  • Step 3 The zinc oxide varistor sheet coated with the slurry for the glass protective layer after the second step is subjected to a curing heat treatment to obtain a varistor resistant to a large surge current.
  • the conductive electrode material in the step 1 is coated on the zinc oxide varistor sheet by screen printing or sputtering;
  • preparing the glass protective paste comprising the lanthanum glass frit in the third step comprises the steps of:
  • the glass protective paste prepared by the step bl is printed. Covering the zinc oxide varistor sheet with the silver electrode layer after the second step of infiltration, specifically, the glass protective paste is printed on the varistor sheet with the silver electrode layer using a steel mesh having a pore diameter of 10-40 ⁇ m. The printing thickness is 15 ⁇ 80 ⁇ .
  • preparing the glass protective paste comprising the lanthanum glass frit in the third step comprises the steps of:
  • A2 preparing a binder, according to the specific gravity, ethyl cellulose 8 ⁇ 18, acetate 30 ⁇ 40, Dingmy 45 ⁇ 55 are uniformly mixed in a water bath of 50-90 degrees, and the mixing time ranges from 1 to 8 hours;
  • the glass protective slurry prepared in the step bl is sprayed on the zinc oxide varistor sheet with the silver electrode layer after the second step of inactivation, specifically, the slurry is uniformly sprayed by using a compressed air spray gun.
  • the varistor sheet with a silver electrode layer has a thickness of 5 to 100 ⁇ m.
  • a varistor resistant to large surge current surges comprising a zinc oxide varistor sheet and a conductive electrode layer disposed on both sides of the zinc oxide varistor sheet, the zinc oxide varistor sheet and the conductive electrode layer Covered with a glass protective layer made of a binder and glass frit.
  • the binder comprises ethyl cellulose, acetate and butyl, and the ethyl cellulose 8-18, the acetate 30-40, and the Ding puzzle 45-55 in the water of 50-90 degrees by weight. Mix well in the bath, mixing time range is 1 ⁇ 8 hours.
  • the glass protective paste comprises the binder, bismuth-based glass frit and terpineol, and binder 10-20, bismuth glass frit 60-70, terpineol 15-25 according to parts by weight. Add, use a rolling mill for mixing, and repeat rolling for 1 to 5 times.
  • the glass protective paste comprises a binder, a bismuth-based glass frit and an acetate, and the binder 5 ⁇ 15, the bismuth glass powder 45-55, and the acetate 35-45 are added according to the specific gravity. The mixture was stirred and mixed for 0.5 to 3 hours.
  • FIG. 1 is a schematic structural view of a cylindrical varistor according to a specific embodiment of the present invention
  • FIG. 2 is a schematic structural view of a square-column varistor according to an embodiment of the present invention.
  • a zinc oxide varistor sheet with a diameter of 20 mm and a thickness of 3 mm is used.
  • the varistor is available in diameters from 3mm to 130mm and thicknesses from 0.5mm to 50mm.
  • the thickness of the silver electrode on the varistor sheet is 6 ⁇ 35 ⁇ using a 100 ⁇ 400mesh screen-printed silver electrode.
  • the varistor sheet printed with the silver electrode is placed in an atmosphere furnace to infiltrate, the temperature is 450-700 degrees, and the length is 7 to 100 minutes.
  • Al binder Mix ethyl cellulose, acetate, and meditation in a water bath (50 ⁇ 90 degrees) for 1 ⁇ 8 hours.
  • Bl glass protective paste The binder, bismuth glass frit, and terpineol are added in proportion, mixed by a rolling mill, and repeatedly rolled 1 to 5 times.
  • Printing glass protective layer using a steel mesh with a hole diameter of 10 ⁇ 40 ⁇ to print the paste on the varistor sheet with silver electrode layer, the thickness is 15 ⁇ 80 ⁇ .
  • Curing heat treatment the varistor sheet after printing the glass is placed in a heating furnace at a temperature of 400-750 degrees Celsius for a duration of 20 150 minutes.
  • the surge current surge resistance is mentioned by 10kA.
  • a zinc oxide varistor ceramic piece having a size of 34 X 34 mm and a thickness of 3.5 mm is used.
  • the varistor can be selected from side lengths from 5 x 5mm to 60 x 60mm and thicknesses from 0.5mm to 50mm.
  • the thickness of the pole is 6 ⁇ 35 ⁇ .
  • A2 binder Mix ethyl cellulose, acetate, and meditation in a water bath (50 ⁇ 90 degrees) for 1 ⁇ 8 hours.
  • B2 Glass protective paste Mix the binder, bismuth glass powder and acetate in proportion, and mix and stir for 0.5 to 3 hours using a rotary mixer.
  • the surge current surge resistance is mentioned by 40kA.
  • the ratio of the components in the above two examples can be referred to the following table. Binder, glass protective paste, surge current surge
  • a varistor resistant to large surge current surges comprising a zinc oxide varistor sheet and a conductive electrode layer disposed on both sides of the zinc oxide varistor sheet, wherein the zinc oxide varistor and the conductive electrode layer are overcoated
  • a glass protective layer made of a binder and glass.
  • the zinc oxide varistor sheet in this embodiment may be a cylindrical or square column shape, a cylindrical zinc oxide varistor sheet 1, corresponding to a circular conductive electrode layer 2 and a circle.
  • the shaped glass protective layer 3 is matched thereto, and the square-shaped zinc oxide varistor sheet 4, the corresponding square-shaped conductive electrode layer 5 and the square glass protective layer 6 are matched thereto.
  • the conductive electrode layer is made of a conductive material such as gold, silver, copper, aluminum, chromium or nickel, and can be covered on the end surface of the varistor sheet by screen printing, sputtering or the like. After screen printing, it is necessary to infiltrate in a specified atmosphere; when using the sputtering method, it is necessary to select different targets in accordance with the conditions of use of the varistor performance in different combinations and sequences.
  • the binder comprises ethyl cellulose, acetate and butyl mystery, and the ethyl cellulose 8-18, the acetate 30-40, and the Dingri 45-55 are mixed in a water bath of 50-90 degrees by weight. Uniform, mixing time range is 1 ⁇ 8 hours.
  • the glass protective paste comprises the binder, bismuth-based glass frit and terpineol, and the binder 10-20, the bismuth glass frit 60-70, and the terpineol 15 ⁇ 25 are added according to the weight part, and used.
  • the rolling mill is mixed and repeatedly rolled for 1 to 5 times.
  • the glass protective paste can also be made of a binder, a lanthanum glass powder and an acetate.
  • the binder 5 to 15, the bismuth glass frit 45 to 55, and the acetate 35 to 45 were added in accordance with the specific gravity, and the mixture was stirred and mixed for 0.5 to 3 hours using a rotary mixer.
  • the glass protective slurry is combined with the varistor sheet with the conductive electrode layer by using a device or a tool, and can be printed, sprayed, rolled, pasted, pressed, etc., according to the lanthanide in the glass protective paste.
  • the physical properties of the glass powder are selected to a suitable heat treatment temperature, usually 400 750 ° C, and 20 to 150 minutes to complete the vitrification to form a glass protective layer.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)

Abstract

本发明公开了一种耐大浪涌电流冲击的压敏电阻制备方法及压敏电阻,包括步骤:步骤一:将导电电极材料覆设在氧化锌压敏电阻片上,得到带导电电极层的氧化锌压敏电阻片;步骤二:制备包括铋系玻璃粉的玻璃保护层用浆料,将该玻璃保护浆料覆在经过步骤一的带导电电极层的氧化锌压敏电阻片上;步骤三:对经过步骤二处理后的覆有玻璃保护层用浆料的氧化锌压敏电阻片进行固化热处理,即得耐大浪涌电流冲击的压敏电阻。本发明压敏电阻可以达到比之前更高的性能要求,增加25%以上的耐浪涌电流冲击水平。

Description

说明书
一种耐大浪涌电流冲击的压敏电阻的制备方法及压敏电阻 技术领域
本发明涉及压敏电阻生产领域,尤其是涉及浪涌抑制型压敏电阻 器。
背景技术
目前市面上的压敏电阻在使用过程中是按照设定的电流冲击要 求来选择不同的直径或型号,往往在实际应用时电路中的过电压或浪 涌电流超出了压敏电阻的设计规范,造成压敏电阻片失效击穿或电路 设备损坏。
针对这种状况 一般会采取以下的两类方法来避免:
挑选通流面积更大、保护水平更高的压敏电阻来代替或者使用两 片或两片以上的压敏电阻使用组合的方式来达到。但是这两种方式生 产成本都高, 而且体积也大, 用起来也不方便。
发明内容
基于现有技术的不足, 本发明的目的是提供一种耐大浪涌电流冲 击的压敏电阻的制备方法及压敏电阻,在不增大压敏电阻的尺寸或增 加压敏电阻数量的情况下, 提高产品的耐浪涌电流冲击能力
为实现上述目的, 本发明的技术方案为:
一种耐大浪涌电流冲击的压敏电阻制备方法,其特征在于包括以 下步骤: 步骤一: 将导电电极材料覆设在氧化锌压敏电阻片上, 得到带导 电电极层的氧化锌压敏电阻片;
步骤二: 制备包括铋系玻璃粉的玻璃保护层用浆料, 将该玻璃保 护浆料覆在经过步骤一的带导电电极层的氧化锌压敏电阻片上;
步骤三: 对经过步骤二处理后的覆有玻璃保护层用浆料的氧化锌 压敏电阻片进行固化热处理, 即得耐大浪涌电流冲击的压敏电阻。
进一步的, 所述步骤一中的导电电极材料覆设在氧化锌压敏电阻 片上的方式可采用丝网印刷或溅射;
当选择丝网印刷时, 则丝网印刷后需要进行烧渗, 烧渗温度为
450 700度, 时长 7~100分钟。 选择溅射方式时, 则需要按照压敏电 阻性能的使用条件而选择不同的靶材按照不同的组合与顺序进行操 作。
进一步的, 步骤三中制备包括铋系玻璃粉的玻璃保护浆料包括步 骤:
al, 制备粘结剂, 按照比重将乙基纤维素 8~18、 醋酸酯 30~40、 丁谜 45~55在 50~90度的水浴箱内混合均匀, 混合时间范围为 1~8 小时;
bl, 制备玻璃保护浆料, 按照比重将步骤 al 中制备的粘结剂 10-20, 铋系玻璃粉 60~70、 松油醇 15~25添加, 使用滚轧机进行混 合、 重复滚轧 1~5次。 进一步的, 将经过步骤 bl制备的玻璃保护浆料经过印刷的方式 覆在经过步骤二烧渗后的带银电极层的氧化锌压敏电阻片上,具体为 使用孔径为 10~40μπι的钢丝网将该玻璃保护浆料印在带银电极层的 压敏电阻片上, 印刷厚度为 15~80μπι。
进一步的, 步骤三中制备包括铋系玻璃粉的玻璃保护浆料包括步 骤:
a2, 制备粘结剂, 按照比重将乙基纤维素 8~18、 醋酸酯 30~40、 丁谜 45~55在 50~90度的水浴箱内混合均匀, 混合时间范围为 1~8 小时;
hi, 制备玻璃保护浆料, 按照比重将步骤 a2 中制备的粘结剂 5-15, 铋系玻璃粉 45~55、 醋酸脂 35~45添加, 使用旋转搅拌机机进 行混合搅拌 0.5~3小时。 进一步的, 将经过步骤 bl制备的玻璃保护浆料经过喷涂的方式 覆在经过步骤二烧渗后的带银电极层的氧化锌压敏电阻片上,具体为 使用压缩空气喷枪将浆料均匀喷涂在带银电极层的压敏电阻片上,厚 度为 5~100μπι。
一种耐大浪涌电流冲击的压敏电阻,包括氧化锌压敏电阻片及设 置在所述氧化锌压敏电阻片两边的导电电极层,所述氧化锌压敏电阻 片及导电电极层外覆有玻璃保护层,所述玻璃保护层由粘结剂和玻璃 粉制成。
进一步的, 所述粘结剂包括乙基纤维素、 醋酸酯和丁谜, 按照重 量份将乙基纤维素 8~18、醋酸酯 30~40、丁谜 45~55在 50~90度的水 浴箱内混合均匀, 混合时间范围为 1~8小时。 进一步的, 所述玻璃保护浆料包括所述粘结剂、铋系玻璃粉和松 油醇,按照重量份将粘结剂 10~20、铋系玻璃粉 60~70、松油醇 15~25 添加, 使用滚轧机进行混合、 重复滚轧 1~5次获得。
进一步的,所述玻璃保护浆料包括粘结剂、铋系玻璃粉和醋酸酯, 按照比重将所述粘结剂 5~15、铋系玻璃粉 45~55、醋酸脂 35~45添加, 使用旋转搅拌机机进行混合搅拌 0.5~3小时获得。
本发明的有益效果为:
使用相同体积的压敏电阻可以达到比之前更高的性能要求,增加 25%以上的耐浪涌电流冲击水平;
在组合使用时以更低的成本达到了更高的要求。
满足了对浪涌抑制型压敏电阻的光伏应用要求。
附图说明
图 1为本实用新型具体实施例的圆柱形压敏电阻结构示意图; 图 2为本实用新型具体实施例的方柱形压敏电阻结构示意图。
具体实施方式
以下将结合实施例和附图对本发明的构思、具体结构及产生的技 术效果进行清楚、 完整地描述, 以充分地理解本发明的目的、特征和 效果。 显然, 所描述的实施例只是本发明的一部分实施例, 而不是全 部实施例, 基于本发明的实施例, 本领域的技术人员在不付出创造性 劳动的前提下所获得的其他实施例, 均属于本发明保护的范围。 一种耐大浪涌电流冲击的压敏电阻制备方法, 具体实施例一:
1 )选用直径为 20mm, 厚度为 3mm的氧化锌压敏电阻片。 压敏 电阻片的直径尺寸从 3mm到 130mm,厚度从 0.5mm到 50mm选择。
2)使用 100~400mesh 的丝网印刷银电极在压敏电阻片上的银电 极厚度为 6~35μπι。
3)将印好银电极的压敏电阻片放入气氛炉中烧渗, 温度为 450-700度,时长 7~100分钟。
4)制备玻璃保护浆料:
al粘结剂:将乙基纤维素、醋酸酯、丁谜在水浴箱内(50~90度) 混合均匀, 1~8小时。
bl 玻璃保护浆料: 将粘结剂、 铋系玻璃粉、 松油醇按照比例添 加, 使用滚轧机进行混合、 重复滚轧 1~5次即可。
5)印刷玻璃保护层, 使用孔径为 10~40μπι 的钢丝网将浆料印在 带银电极层的压敏电阻片上, 厚度为 15~80μπι。
6)固化热处理, 印刷玻璃后的压敏电阻片放置在加热炉中,温度 400-750摄氏度,时长 20 150分钟。
通过此方法处理的产品, 耐浪涌电流冲击能力由 10kA 提到 具体实施例二:
1)选用尺寸为 34 X 34mm,厚度为 3.5mm的氧化锌压敏电阻陶瓷 片。 压敏电阻片的尺寸可为边长从 5 X 5mm 到 60 X 60mm, 厚度从 0.5mm到 50mm之间选择。 2)使用 100~400mesh 的丝网印刷银电极在压敏电阻片上的银电
极厚度为 6~35μπι。
3)将印好银电极的压敏电阻片放入气氛炉中烧渗, 温度为
450-700度,时长 7~100分钟。
4)制备玻璃保护浆料:
a2粘结剂:将乙基纤维素、醋酸酯、丁谜在水浴箱内(50~90度) 混合均匀, 1~8小时。
b2 玻璃保护浆料: 将粘结剂, 铋系玻璃粉, 醋酸酯按照比例添 力口, 使用旋搅拌机机进行混合搅拌 0.5~3小时。
5)喷涂玻璃保护层, 使用压缩空气喷枪将浆料均匀喷涂在带银电 极层的压敏电阻片上, 厚度为 5~100μπι。
6)固化热处理, 印刷玻璃后的压敏电阻片放置在加热炉中, 温度
400-750摄氏度,时长 20 150分钟。
通过此方法处理的产品, 耐浪涌电流冲击能力由 40kA 提到 上述两个实施例中的各成分的配比可参考下表。 粘结剂 玻璃保护浆料 浪涌电流冲击
(wt%) (wt%) (8/20MS) 铋系玻 乙基纤维素 醋酸酯 丁谜 粘结剂 璃粉 松油醇 醋酸酯 (14KA ) ( 60KA ) 实施
通过
例一 8-18 30-40 45-55 10-20 60-70 15-25 实施
通过 例二 8-18 30-40 45-55 5-15 45-55 35-45
一种耐大浪涌电流冲击的压敏电阻,包括氧化锌压敏电阻片及设 在所述氧化锌压敏电阻片两边的导电电极层,所述氧化锌压敏电阻 及导电电极层外覆有玻璃保护层,所述玻璃保护层由粘结剂和玻璃 制成。
如图 1和 2所示,本实施例中的氧化锌压敏电阻片可为圆柱形或 方柱形, 圆柱形氧化锌压敏电阻片 1, 对应的有圆形的导电电极层 2 和圆形的玻璃保护层 3与之匹配, 方柱形的氧化锌压敏电阻片 4, 对 应的有方柱形的导电电极层 5和方形的玻璃保护层 6与之匹配。
导电电极层, 材料有金、 银、 铜、 铝、 铬、 镍等导电材料, 可使 用丝网印刷、溅射等方式将其覆盖在压敏电阻片端面。使用丝网印刷 后需要在指定的气氛环境下进行烧渗;使用溅射方法时需要按照压敏 电阻性能的使用条件而选择不同的靶材按照不同的组合与顺序进行 操作。
所述粘结剂包括乙基纤维素、醋酸酯和丁谜, 按照重量份将乙基 纤维素 8~18、醋酸酯 30~40、丁谜 45~55在 50~90度的水浴箱内混合 均匀, 混合时间范围为 1~8小时。 所述玻璃保护浆料包括所述粘结剂、铋系玻璃粉和松油醇, 按照 重量份将粘结剂 10~20、 铋系玻璃粉 60~70、 松油醇 15~25添加, 使 用滚轧机进行混合、 重复滚轧 1~5次获得。
所述玻璃保护浆料还可以通过粘结剂、 铋系玻璃粉和醋酸酯制 得, 按照比重将所述粘结剂 5~15、 铋系玻璃粉 45~55、 醋酸脂 35~45 添加, 使用旋转搅拌机机进行混合搅拌 0.5~3小时获得。
本实施例使用设备或工具将玻璃保护浆料与带导电电极层的压 敏电阻片结合起来, 可以使用印刷、喷涂、滚涂、黏贴、压合等方式, 根据玻璃保护浆料中铋系玻璃粉的物理性能选择合适的热处理温度, 通常为 400 750摄氏度, 20~150分钟可完成玻璃化, 形成玻璃保护 层。
需要说明的是, 以上所述只是本发明的较佳实施例而已, 本发明 并不局限于上述实施方式,只要其以相同的手段达到本发明的技术效 果, 都应属于本发明的保护范围。

Claims

权利要求书
1、一种耐大浪涌电流冲击的压敏电阻制备方法, 其特征在于包括 以下步骤:
步骤一: 将导电电极材料覆设在氧化锌压敏电阻片上, 得到带导 电电极层的氧化锌压敏电阻片;
步骤二: 制备包括铋系玻璃粉的玻璃保护层用浆料, 将该玻璃保 护浆料覆在经过步骤一的带导电电极层的氧化锌压敏电阻片上;
步骤三: 对经过步骤二处理后的覆有玻璃保护层用浆料的氧化锌 压敏电阻片进行固化热处理, 即得耐大浪涌电流冲击的压敏电阻。
2、 如权利要求 1所述的耐大浪涌电流冲击的压敏电阻制备方法, 其特征在于:所述步骤一中的导电电极材料覆设在氧化锌压敏电阻片 上的方式可采用丝网印刷或溅射;
当选择丝网印刷时, 则丝网印刷后需要进行烧渗, 烧渗温度为 450~700度, 时长 7~100分钟。
3、 如权利要求 1所述的耐大浪涌电流冲击的压敏电阻制备方法, 其特征在于:步骤三中制备包括铋系玻璃粉的玻璃保护层用浆料包括 步骤:
al, 制备粘结剂, 按照比重将乙基纤维素 8~18、 醋酸酯 30~40、 丁谜 45~55在 50~90度的水浴箱内混合均匀, 混合时间范围为 1~8 小时; bl, 制备玻璃保护浆料, 按照比重将步骤 al 中制备的粘结剂 10-20, 铋系玻璃粉 60~70、 松油醇 15~25添加, 使用滚轧机进行混 合、 重复滚轧 1~5次。
4、如权利要求 3所述的耐大浪涌电流冲击的压敏电阻制备方法, 其特征在于: 将经过步骤 bl制备的玻璃保护层用浆料经过印刷的方 式覆在经过步骤二烧渗后的带银电极层的氧化锌压敏电阻片上,具体 为使用孔径为 10~40μπι的钢丝网将该玻璃保护层用浆料印在带银电 极层的压敏电阻片上, 印刷厚度为 15~80μπι。
5、 如权利要求 1所述的耐大浪涌电流冲击的压敏电阻制备方法, 其特征在于:步骤三中制备包括铋系玻璃粉的玻璃保护层用浆料包括 步骤:
a2, 制备粘结剂, 按照比重将乙基纤维素 8~18、 醋酸酯 30~40、 丁谜 45~55在 50~90度的水浴箱内混合均匀, 混合时间范围为 1~8 小时;
bl, 制备玻璃保护层用浆料, 按照比重将步骤 a2中制备的粘结 剂 5~15、铋系玻璃粉 45~55、醋酸脂 35~45添加, 使用旋转搅拌机机 进行混合搅拌 0.5~3小时。
6、如权利要求 5所述的耐大浪涌电流冲击的压敏电阻制备方法, 其特征在于: 将经过步骤 bl制备的玻璃保护层用浆料经过喷涂的方 式覆在经过步骤二烧渗后的带银电极层的氧化锌压敏电阻片上,具体 为使用压缩空气喷枪将浆料均匀喷涂在带银电极层的压敏电阻片上, 厚度为 5~100μπι。
7、 一种耐大浪涌电流冲击的压敏电阻, 包括氧化锌压敏电阻片 及设置在所述氧化锌压敏电阻片两边的导电电极层,所述氧化锌压敏 电阻片及导电电极层外覆有玻璃保护层, 其特征在于: 玻璃保护层由 粘结剂和玻璃粉制成。
8、 如权利要求 7所述的一种耐大浪涌电流冲击的压敏电阻, 其 特征在于:
所述粘结剂包括乙基纤维素、醋酸酯和丁谜, 按照重量份将乙基 纤维素 8~18、醋酸酯 30~40、丁谜 45~55在 50~90度的水浴箱内混合 均匀, 混合时间范围为 1~8小时。
9、 如权利要求 8所述的一种耐大浪涌电流冲击的压敏电阻, 其 特征在于: 所述玻璃保护浆料包括所述粘结剂、铋系玻璃粉和松油醇, 按照 重量份将粘结剂 10~20、 铋系玻璃粉 60~70、 松油醇 15~25添加, 使 用滚轧机进行混合、 重复滚轧 1~5次获得。
10、如权利要求 8所述的一种耐大浪涌电流冲击的压敏电阻, 其 特征在于:
所述玻璃保护浆料包括粘结剂、铋系玻璃粉和醋酸酯, 按照比重 将所述粘结剂 5~15、铋系玻璃粉 45~55、醋酸脂 35~45添加, 使用旋 转搅拌机机进行混合搅拌 0.5~3小时获得。
PCT/IB2018/050843 2017-02-13 2018-02-12 一种耐大浪涌电流冲击的压敏电阻的制备方法及压敏电阻 Ceased WO2018146644A1 (zh)

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