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Welded circular piezoresistor as well as preparation method and application thereof

A varistor and ring technology, applied in resistors, resistance manufacturing, non-adjustable metal resistors, etc., can solve the problems of complex motor production and assembly process, obstacles to motor miniaturization design, and many defective products in the production line. Quantitative manufacturing, simple structure, reasonable structure effect

Active Publication Date: 2012-09-26
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the gas valve motor needs to be certified for safety, which requires that the safety function parts have a double-piece double-function structure. Therefore, in the prior art, two ring-shaped piezoresistors need to be installed and welded. This method makes the motor production and assembly process complicated, and the production line is defective. Many, it brings obstacles to the miniaturization design of the motor, the disadvantages of high production cost of the motor, and the effect is not good

Method used

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  • Welded circular piezoresistor as well as preparation method and application thereof
  • Welded circular piezoresistor as well as preparation method and application thereof
  • Welded circular piezoresistor as well as preparation method and application thereof

Examples

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preparation example Construction

[0024] The manufacturing method of the above welded annular piezoresistor includes two steps of manufacturing the annular ceramic dielectric substrate 12 and manufacturing the metal electrode 11 . In the 12 steps of manufacturing the annular ceramic dielectric substrate, the SrTiO 3 The base ceramic material powder is pressed into a ring body, sintered into a ceramic body at 1200-1400°C in a mixed atmosphere of hydrogen and nitrogen at a ratio of 1.5-2.5:7-9, and finally heat-treated at 800-1000°C in air to complete the ring shape. Manufacturing of the ceramic dielectric substrate 12; in the step of manufacturing the metal electrode 11, the metal paste is printed on the surface of the annular ceramic dielectric substrate 12 by a screen printing process, so that the surface is evenly distributed on the circumference with at least three mutually independent Each electrode combination unit is composed of two mutually independent metal electrodes 11, and then the electrodes are dr...

Embodiment

[0029] The preparation method comprises the following steps: SrTiO 3 Manufacturing of materials, manufacturing of annular ceramic dielectric substrate 12, manufacturing of metal electrode 11, and parameter testing of welded annular piezoresistors.

[0030] Specific manufacturing process:

[0031] 1. SrTiO 3 material manufacturing

[0032] According to the ratio of SrTiO 3 :SiO:ZrO:La 2 o 3 : Nb 5 o 2 : CaO = 100: 2: 2: 1.7: 0.8: 0.1 Mix the above raw materials evenly, grind the particles by ball milling for 24 hours, and then dry them at 180°C to form 100-200 mesh powder particles to make SrTiO 3 Base capacitor-varistor composite functional ceramic material.

[0033] 2. Manufacture of annular ceramic dielectric substrate 12

[0034] According to the assembly size of the gas valve motor, the size of the welded ring piezoresistor is Φ8.0±0.2mm in outer diameter, Φ5.0±0.2mm in inner diameter, and 0.5~0.7mm in thickness.

[0035] The manufacturing process of the annular ce...

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Abstract

The invention discloses a welded circular piezoresistor which comprises a circular ceramic medium substrate and a plurality of metal electrodes. At least three independent electrode combination units are uniformly distributed on the surface of the circular ceramic medium substrate in circumference. Each electrode combination unit consists of two independent metal electrodes. The invention has simple structure and high reliability, and when one metal electrode in the electrode combination unit in process of use has invalid welding point connection, the second metal electrode acts equally, thereby preventing the whole product from being invalid, ensuring the function of eliminating electric sparks of the circular piezoresistor and ensuring the safety. The invention has the advantages of stable performance, reasonable structure, convenient use, easy batch production and the like, can be applied to a gas valve motor to meet safety requirement of double safety and is suitable for the traditional manual welding and semi-automatic welding production line of motor manufacturing.

Description

technical field [0001] The invention relates to the field of electronic components, in particular to a welded ring piezoresistor and a preparation method thereof, especially suitable for gas valve motors. Background technique [0002] The gas valve motor will generate electric sparks between its commutator and brushes during the opening and closing process and high-speed rotation. The generation of electric sparks will reduce the working life of the motor and generate serious electromagnetic interference. For working with flammable and explosive gas There are significant safety hazards in the environment. In order to absorb electric sparks to eliminate noise interference and safety performance, a resistor-capacitor component or a piezoresistor must be installed on the motor for protection. [0003] Since this type of motor has been developed into a small and compact type, the use of resistors and capacitors has basically been eliminated, and all ring varistors have been use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/102H01C17/00H01C17/065H02K11/00H02K11/25
Inventor 张振勇邓佩佳夏颖梅
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG