CN109734426A

CN109734426A - Dielectric ceramic material

Info

Publication number: CN109734426A
Application number: CN201910221932.1A
Authority: CN
Inventors: 石庆国; 庄沅鑫; 石浩宇; 石连政
Original assignee: Zunhua Sifang Machinery Equipment Co Ltd
Current assignee: Zunhua Sifang Machinery Equipment Co Ltd
Priority date: 2019-03-22
Filing date: 2019-03-22
Publication date: 2019-05-10

Abstract

The present invention relates to technical field of ceramic material, especially a kind of dielectric ceramic material for automobile spark plug sparking.The material is sintered at a temperature of 1700-2000 degree by following raw material by mass percentage, the Al including 70.0-80.0%₂O₃, 4-6%MgO, 6-9% Fe₂O₃, 1-2% WC, 1.5-3% BN, 5-8%CuO, 4-6% Cr₂O₃, 2-3% ZrO₃、CeO₃6-8%, 0.5-1% ZnO.The present invention has discharge in insulation performance, and for discharge breakdown sparking between automobile spark plug positive and negative electrode, spark temperature is high, and igniting is punctual reliable, can catch fire fire, increases power, reduces noise, the discharge of tail gas is reduced, it is energy-saving and environment-friendly, it is able to extend the service life of spark plug.

Description

Dielectric ceramic material

Technical field

The present invention relates to technical field of ceramic material, especially a kind of dielectric ceramics material for automobile spark plug sparking Material.

Background technique

Existing automobile spark plug includes the center positive electrode core made of copper alloy, is set with outside center positive electrode core absolutely Edge ceramic protective sleeve is set with the shell made of ferroalloy materials outside insulating ceramics protective case, is provided on shell and center The negative electrode hook of positive electricity pole piece cooperation sparking, has certain gap, by positive and negative between negative electrode hook and center positive electrode core Polar conductor inputs high voltage power supply, discharge breakdown, and the mixed gas of strike sparks ignition engine cylinder intracorporal gasoline and air makes its machine Tool acting, band electrical automobile overall operation, but negative electrode hook tip only one put upper discharge breakdown sparking, while sparking Poly- carbon can be slowly generated among positive and negative electrode, the time, more long poly- carbon was more, and poly- carbon increases thickness, and firing temperature also can slowly subtract It is low, there will be individual strokes to misfire in IC engine cylinder body, not do work, make oil, air gas mixture discharge, increase blowdown flow rate, Reduce power, noise increases accordingly, and carbon distribution increases to a certain amount of, burns out negative electrode hook, negative electrode during discharging sparking Hook, which is burned, causes entire spark plug to be scrapped, and service life is short, and automobile is caused to be frequently necessary to replacement spark in maintenance Plug, currently, realizing that disruptive discharge is struck sparks using dielectric substance between the positive and negative electrode of automobile spark plug, thus alternatively electric Pole metal hook structure is the current main developing direction of spark plug production industry, and dielectric ceramics high mechanical strength, is not easy old Change, have the advantages that high pressure resistant, high temperature resistant, chemical stability are good, electromechanical properties are good, which are mainly applied to production capacitor, tools There is high dielectric constant, temperature coefficient can adjust in a wider range, and dielectric loss is low, and it is especially more superior in high frequency, such as What makes a kind of dielectric ceramic material suitable for doing Dielectric Disruptive Discharge sparking between spark plug positive and negative electrode, to improve Spark plug sparking temperature, increases sparking spark, improves duration of ignition accuracy, and increasing power of IC engine is urgently to be resolved at present The problem of.

Summary of the invention

Present invention seek to address that the above problem, strikes sparks for automobile spark plug to provide one kind and can be improved raising Spark plug sparking temperature, increases sparking spark, improves duration of ignition accuracy, the dielectric ceramics material of increasing power of IC engine Material.

The present invention solves described problem, the technical solution adopted is that:

A kind of dielectric ceramic material, the material are burnt at a temperature of 1700-2000 degree by following raw material by mass percentage It ties, the Al including 70.0-80.0%₂O₃, 4-6%MgO, 6-9% Fe₂O₃, 1-2% WC, 1.5-3% BN, 5-8%CuO, The Cr of 4-6%₂O₃, 2-3% ZrO₃、CeO₃6-8%, 0.5-1% ZnO.

The present invention by adopting the above technical scheme, compared with prior art, the feature protruded is:

With discharge in insulation performance, for discharge breakdown sparking between automobile spark plug positive and negative electrode, spark temperature is high, and igniting is quasi- When it is reliable, can catch fire fire, increase power, reduce noise, reduce the discharge of tail gas, it is energy-saving and environment-friendly, be able to extend fire The service life of Hua Sai.

Specific embodiment:

Below with reference to embodiment, the invention will be further described, and purpose, which is only that, more fully understands the content of present invention, therefore, institute The example of act is not intended to limit protection scope of the present invention.

A kind of dielectric ceramic material, the material is by following raw material by mass percentage in 1700-2000 degree temperature Under be sintered, the Al including 70.0-80.0%₂O₃, 4-6%MgO, 6-9% Fe₂O₃, 1-2% WC, 1.5-3% BN, 5-8% The Cr of CuO, 4-6%₂O₃, 2-3% ZrO₃、CeO₃6-8%, 0.5-1% ZnO.

Dielectric ceramic material of the present invention not only insulated but also discharged, for putting between automobile spark plug positive and negative electrode as medium Electrical breakdown sparking, spark temperature is high, and igniting is punctual reliable, and can catch fire fire, increases power, and increasing power of IC engine reduces Noise reduces the discharge of tail gas, energy-saving and environment-friendly, is able to extend the service life of spark plug, and the present invention can also do coating With such as on the high insulating ceramics element surface of Industry, one layer of certain thickness ceramic material of the present invention of painting is carrying out high temperature It is the same, i.e. insulation electric discharge again using function after sintering.

The foregoing is merely preferably feasible embodiment of the invention, not thereby limiting the scope of the invention, It is all to use equivalence changes made by present specification, it is intended to be included within the scope of the present invention.

Claims

1. a kind of dielectric ceramic material, it is characterised in that: the material is by following raw material by mass percentage in 1700- It is sintered at a temperature of 2000 degree, the Al including 70.0-80.0%₂O₃, 4-6%MgO, 6-9% Fe₂O₃, 1-2% WC, 1.5-3% BN, 5-8%CuO, 4-6% Cr₂O₃, 2-3% ZrO₃、CeO₃6-8%, 0.5-1% ZnO.