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A kind of lightning protection surge composite varistor and preparation method thereof

A varistor, composite technology, applied in the direction of varistor, overvoltage protection resistor, resistor, etc., can solve the problems of high current shock resistance, weak sensitivity, loss of high sensitivity, etc.

Active Publication Date: 2018-07-13
GUANGXI NEW FUTURE INFORMATION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The formula containing chromium includes a zinc oxide varistor material and its preparation method, the patent number is 201010538897.5, a zinc oxide varistor material and its preparation method, the patent number is 201210582082.6, a Bi-based zinc oxide varistor material , the patent number is 201210031381.0, a low dielectric constant varistor material and its preparation method, the patent number is 201210007305.6, a high potential gradient zinc oxide varistor material and its preparation method, the patent number is 201110421092.7, a high-throughput small Zinc oxide varistor dielectric material and its preparation method, the patent number is 201410389495.1, a low-temperature sintered zinc oxide varistor material and its preparation method, the patent number is 201210093922.2, etc. The environmentally friendly formula has a high-energy zinc oxide Varistor material and its preparation method, the patent number is 201110386332.4, a chromium-free lead-free medium-high voltage zinc oxide varistor material and its preparation method, the patent number is 201110233644.1, these formulas have a common law, that is, high-sensitivity formula The nonlinear change of the varistor is large after a large current impact, and the internal structure of the ceramic body is severely damaged, thus losing the advantage of high sensitivity, while the lightning protection valve with a low nonlinear coefficient can withstand a large number of high current impacts, and its own voltage change rate and the non-linear coefficient change rate are not large, but the sensitivity is relatively weak. Therefore, the formula and structure of the above-mentioned varistor still need to be designed and improved, which can realize the high sensitivity of the varistor under the impact of small current. At the same time, under the repeated impact of high current, the internal structure of the piezoresistor changes little, so as to realize effective lightning protection

Method used

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  • A kind of lightning protection surge composite varistor and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of a lightning surge protection compound varistor is carried out according to the following steps:

[0032] 1. First weigh 3 kg of industrial superior grade ZnO powder and put it into the ball mill jar, then weigh and analyze the pure raw material 115.8081 g Bi 2 o 3 , 44.3945 g Co 2 o 3 , 111.4663 g Sb 2 o 3 , 21.9758 g MnCO 3 , 25.2950 g Ni 2 o 3 , 2.3558 g ZrO 2 , 3.4461 g SiO 2 , 5.7626 g SnO 2 Put it into a ball mill jar to form the main ingredient A1, then weigh 0.4516 grams of H 3 BO 3 , 2.1516 grams of Al (NO 3 ) 3 9H 2 O, 0.8899 g AgNO 3 , 0.3785 g CH 3 Put COOLi into beaker S1, add 100ml of deionized water, and dissolve it completely in a water bath at 95°C to form solution B1, then weigh 0.5284 grams of K 2 CO 3 Put it into beaker S2, add 50ml of deionized water, stir well, and dissolve it completely at room temperature to form solution C1.

[0033] 2. Add all the solution B1 and solution C1 to the main material A1, add...

Embodiment 2

[0050] A method for manufacturing a lightning surge protection compound varistor is carried out according to the following steps:

[0051] 1. First weigh 3 kg of industrial superior grade ZnO powder and put it into a ball mill jar, then weigh and analyze 125.3304 g of pure raw material Bi 2 o 3 , 50.9864 g Co 2 o 3 , 100.8136 g Sb 2 o 3 , 33.1260 g MnCO 3 , 25.4195 grams of Ni 2 o 3 , 4.7348 g ZrO 2 , 4.6174 g SiO 2 , 2.8955 g SnO 2 Put it into a ball mill jar to form the main ingredient A1, then weigh 0.2376 grams of H 3 BO 3 , 5.0450 g Al(NO 3 ) 3 9H 2 O, 1.3055 g AgNO 3 , 0.7606 g CH 3 Put COOLi into beaker S1, add 100ml of deionized water, and dissolve it completely in a water bath at 95°C to form solution B1, then weigh 5.3105 grams of K 2 CO 3 Put it into beaker S2, add 50ml of deionized water, stir well, and dissolve it completely at room temperature to form solution C1.

[0052] 2. Add all the solution B1 and solution C1 to the main material A1, add ...

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Abstract

The invention discloses a lightning surge protection composite piezoresistor and a manufacturing method thereof. The varistor is composed of a lightning protection valve chip and a sensitive pressure sensitive chip connected in parallel. The lightning protection valve chip uses a varistor chip with a large current peak value, a low mutation minimum resistance, and a nonlinear coefficient of 45 to 55. The sensitive varistor chip uses a varistor chip with a high nonlinear coefficient and a work-resistant Frequency overvoltage varistor chip. When a small current surge fluctuates in the line due to operation overvoltage or transient overvoltage, the sensitive varistor chip plays the main role and releases the energy immediately. When lightning overvoltage occurs, due to the impact voltage amplitude High and high energy. At this time, the lightning protection valve chip plays the main role, releasing the energy at the first time, so as to ensure the stability of the transmission line. The invention has the advantages of realizing the effective lightning protection and anti-surge impact of the transmission line, greatly prolonging the service life of the product and ensuring the reliability of the product.

Description

technical field [0001] The invention relates to a lightning surge protection composite piezoresistor and a preparation method thereof, belonging to the technical field of electronic component preparation. Background technique [0002] Varistor is a solid-state voltage sensitive element with excellent nonlinear volt-ampere characteristics and the function of suppressing transient overvoltage. Since the ZnO varistor developed by Matsushita Electric in Japan was first used in color TV in 1968, it is now It is widely used in power electronic circuits to protect the circuit from possible damage due to instantaneous voltage mutation of the power supply system. When the high voltage comes, the resistance value of the varistor suddenly drops to shunt the current, preventing the load circuit from being damaged or disturbed by the excessive instantaneous voltage. With the continuous advancement of modern science and technology, people pay more and more attention to quality and enviro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C13/02H01C7/12H01C17/00C04B35/453
Inventor 褚冬进刘丹覃远东王标琼马新华钟璇杨柳
Owner GUANGXI NEW FUTURE INFORMATION IND
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