Resistor body and preparation method thereof, and spark plug and preparation method thereof

A technology of resistors and spark plugs, which is applied in the manufacture of spark plugs, spark plugs, resistors, etc., can solve the problems of high equipment requirements, long production cycle of spark plugs, and easy falling off of silver paste, so as to improve mechanical strength, good mechanical and electrical properties, and improve The effect of thermal shock stability

Inactive Publication Date: 2014-04-23
ZHUZHOU XIANGLU SPECIAL CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention solves the problems in the prior art that the silver paste at both ends of the resistor body is easy to fall off and affects the performance of the spark plug, the requirements for parts and equipment such as porcelain insulators, center electrodes, and wiring screws are relatively high during the preparation of the resistor body, and the production of spark plugs is solved. long-term technical problems

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  • Resistor body and preparation method thereof, and spark plug and preparation method thereof
  • Resistor body and preparation method thereof, and spark plug and preparation method thereof

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preparation example Construction

[0038] The present invention also provides a preparation method for the resistor body 15, which includes the following steps: firstly put conductive powder into the pressing mold for pre-press molding; then put resistance powder for pre-press molding; Pressing and maintaining the pressure to obtain a cylindrical blank; finally, sintering the blank in an oxygen-free atmosphere to obtain the resistor 15 .

[0039] The preparation method of the resistor 15 provided by the present invention is formed by pressing the resistor powder and the conductive layer and then sintering, and can be directly assembled into the through hole of the porcelain insulator 12 to prepare the spark plug provided by the present invention, without subsequently combining the resistor with the conductive layer. The porcelain insulator 12, the central electrode 13, and the terminal screw 16 are sintered together, so the requirements for the insulator 12, the central electrode 13, and the terminal screw 16 ar...

Embodiment 1

[0058] (1) Weigh 41 parts by weight of 90 mesh corundum, 22.5 parts by weight of 250 mesh zirconia, 120 mesh lithium calcium barium borosilicate glass (49wt% SiO 2 , 25.6wt%B 2 o 3 , 7wt%Li 2 O, 16wt% BaO, 2.4wt% CaO) 29.2 parts by weight, carbon black N220 3.4 parts by weight, add it to the ball mill and mix for 1h, then move the mixture to the mixer, add zirconium sol (oxychloride Add 12 parts by weight of hydrogen peroxide to calcium, stir for 30 minutes, then bake in an infrared drying oven at 90°C for 8 hours, pass through a 30-mesh and 100-mesh double-layer sieve to obtain resistance powder.

[0059] (2) Weigh 51 parts by weight of 200 mesh copper powder, 7 parts by weight of 200 mesh nickel powder, lithium calcium barium borosilicate glass (49wt% SiO 2 , 25.6wt%B 2 o 3 , 7wt%Li 2 (0, 16wt%BaO, 2.4wt%CaO) 42 parts by weight, add it into the ball mill and mix for 30min, then move the mixture to the mixer, add 10 parts by weight of PVA aqueous solution with a concent...

Embodiment 2

[0070] (1) Weigh 48.5 parts by weight of 100 mesh corundum, 24 parts by weight of 250 mesh zirconia, 100 mesh lithium calcium barium borosilicate glass (46.7wt% SiO 2 , 22wt%B 2 o 3 , 9.2wt%Li 2 O, 18.7wt%BaO, 1.9wt%CaO, 1.5wt%Al 2 o 3 ) 25.6 parts by weight, carbon black N220 1.9 parts by weight, add them to the ball mill and mix for 1 hour, then move the mixture to the mixer, add zirconium sol (made by adding hydrogen peroxide to calcium oxychloride and hydrolyze) 16.5 parts by weight under stirring portion, stirred for 30 minutes, then baked in an infrared drying oven at 90°C for 8 hours, and passed through a 30-mesh and 100-mesh double-layer sieve to obtain resistance powder.

[0071] (2) Weigh 48.5 parts by weight of 200 mesh copper powder, 6.5 parts by weight of 200 mesh nickel powder, lithium calcium barium borosilicate glass (46.7wt% SiO 2 , 22wt%B 2 o 3 , 9.2wt%Li 2 O, 18.7wt%BaO, 1.9wt%CaO, 1.5wt%Al 2 o 3 ) 45 parts by weight, put it into the ball mill and ...

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Abstract

The invention provides a resistor body, which comprises a middle resistance layer and conductive layers positioned at two ends of the middle resistance layer, wherein the middle resistance layer is formed by pressing and sintering resistance powder containing zirconium gel; and the conductive layers are formed by pressing and sintering conductive powder containing metal powder. The invention also provides a preparation method for the resistor body, a spark plug adopting the resistor body and a preparation method for the spark plug. According to the resistor body, the conductive layers and the middle resistance layer are well combined; and the resistor body has high mechanical strength, resistance characteristic and mechanical electrical performance. The production process for the spark plug adopting the resistor body is simplified, and the production period is short; requirements on other parts are low; and the quality of the spark plug is easy to control.

Description

technical field [0001] The invention belongs to the field of spark plugs for internal combustion engines, and in particular relates to a resistor and a preparation method thereof, a spark plug and a preparation method thereof. Background technique [0002] The resistance type spark plug requires a certain resistance value between its center electrode and the terminal metal parts, so that it can effectively suppress the high-frequency vibration generated by the spark plug in the vehicle ignition system and the electromagnetic interference generated by these vibrations. Therefore, the current spark plugs are all provided with a resistor between the center electrode and the terminal metal piece. Resistors commonly used in the prior art are generally made of glass powder and conductive materials such as carbon black powder or metal powder, but the metal content is not high, so the bonding force between the resistor and the center electrodes at both ends and the terminal metal pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/18H01C17/30H01T13/05H01T13/41H01T21/02
Inventor 李红卫李顺华
Owner ZHUZHOU XIANGLU SPECIAL CERAMICS
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