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Gasoline sensor and manufacturing method thereof

A manufacturing method and sensor technology, applied in the sensor field, can solve the problems of weak gas selectivity, high sensor sensitivity, strong selectivity, and rapid response that cannot be satisfied at the same time, and achieve fast response time, low production cost, and strong selectivity. Effect

Inactive Publication Date: 2013-07-10
北京东方吉华科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. The advantages of semiconductor sensors are high sensitivity, fast response, small size, light weight, easy integration, intelligence, and integration of detection and conversion, but they are not strong in gas selectivity
[0008] At present, the main problem in the research is that there is no sensor specially used to measure the main components of gasoline, and the high sensitivity, strong selectivity, and fast response of the sensor cannot simultaneously meet the requirements.

Method used

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  • Gasoline sensor and manufacturing method thereof
  • Gasoline sensor and manufacturing method thereof
  • Gasoline sensor and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take 70g of WO 3 , 5g of La 2 o 3 , 8g SiO 2 , 3g TiO 2 , 6g of SnO 2 , 3g of Gd 2 o 3 , 2 g MoO 3 , 2g of Nd 2 o 3 , 1g of Pt, add deionized water and grind to make a slurry. Among them: WO 3 Powder material with a particle size of 5-50nm, La 2 o 3 Powder material with a particle size of 5-60nm, SiO 2 Powder material with a particle size of 10-70nm, TiO 2 Powder material with a particle size of 5-60nm, SnO 2 Powder material with a particle size of 5-60nm, Gd 2 o 3 Powder materials with a particle size of 10-70nm, Pt powder materials with a particle size of 10-50nm, MoO 3 Powder material with a particle size of 10-70nm, Nd 2 o 3 Powder materials with a particle size of 10-70nm, and the ash content of sensitive materials is not higher than 0.3%. The slurry was attached to the silicon chip, and calcined at a temperature of 550°C for 5 hours to obtain a sensitive element. Weld the sensitive element on the sensor base, package it, and finally assemble t...

Embodiment 2

[0036] Take 85g of WO 3 , 1g of La 2 o 3 , 5g SiO 2 , 1 g TiO 2 , 1g of SnO 2 , 3g of Gd 2 o 3 , 1 g MoO 3 , 1 g of Nd 2 o 3 , 2g of Pt, add deionized water and grind to make a slurry. Among them: WO 3 Powder material with a particle size of 5-50nm, La 2 o 3 Powder material with a particle size of 5-60nm, SiO 2 Powder material with a particle size of 10-70nm, TiO 2 Powder material with a particle size of 5-60nm, SnO 2 Powder material with a particle size of 5-60nm, Gd 2 o 3 Powder materials with a particle size of 10-70nm, Pt powder materials with a particle size of 10-50nm, MoO 3 Powder material with a particle size of 10-70nm, Nd 2 o 3 Powder materials with a particle size of 10-70nm, and the ash content of each component of the sensitive material is not higher than 0.2%. Adhere the slurry on the silicon chip, and carry out calcination, the calcination temperature is 650°C, and the calcination time is 2 hours, and the sensitive element is obtained. Weld ...

Embodiment 3

[0038] Take 75g of WO 3 , 2g of La 2 o 3 , 8g SiO 2 , 3g TiO 2 , 5g of SnO 2 , 1g of Gd 2 o 3 , 2 g MoO 3 , 2g of Nd 2 o 3 , 2g of Pt, add deionized water and grind to make a slurry. Among them: WO 3 Powder material with a particle size of 5-25nm, La 2 o 3 Powder material with a particle size of 10-30nm, SiO 2 Powder material with a particle size of 10-40nm, TiO 2 Powder material with a particle size of 5-30nm, SnO 2 Powder material with a particle size of 5-30nm, Gd 2 o 3 Powder materials with a particle size of 10-40nm, Pt powder materials with a particle size of 10-25nm, MoO 3 Powder material with a particle size of 10-40nm, Nd 2 o 3 Powder materials with a particle size of 10-40nm, and the ash content of sensitive materials is not higher than 0.2%. Adhere the slurry on the silicon chip, and carry out calcination, the calcination temperature is 600°C, and the calcination time is 4 hours, and the sensitive element is obtained. Weld the sensitive element ...

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Abstract

The invention relates to the field of sensors, particularly to a gasoline sensor and the manufacturing method thereof. The gasoline sensor comprises a heating electrode, a measuring electrode, a sensing element and a power supply, wherein the sensing element is attached on the measuring electrode. The gasoline sensor is characterized in that the sensing element is formed by the steps of preparinga sensing material into slurry, attaching on a chip and calcining; the chip is a silicon wafer, the calcining temperature is 550-650 DEG C, and the calcining time is 2-5 hours; and the sensing material comprises the following components: 70-85% of WO3, 1-5% of La2O3, 5-8% of SiO2, 1-3% of TiO2, 1-6% of SnO2, 1-3% of Gd2O3, 1-2% of MoO3, 1-2% of Nd2O3, and 1-2% of Pt. The sensor provided by the invention has the characteristics of high sensitivity, high selectivity, short response time, good stability and the like to the main components of gasoline.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a gasoline sensor and a manufacturing method thereof. Background technique [0002] Gasoline belongs to Class B fire hazard, with a flash point of -50°C and an explosion range of 1.3%-6.0%. Due to the low flash point and strong volatility of gasoline, it will burn as long as there is a small ignition energy in the air. When gasoline vapor is mixed with air and the concentration reaches the explosion limit range, if it encounters a certain energy source, an explosion will occur. The hydrocarbons discharged into the atmosphere due to gasoline volatilization mainly include alkanes and aromatics, mainly including C4-C8 alkanes, toluene, xylene, etc. [0003] Generally, there are two types of sensors for detecting gasoline volatile gas: one is a catalytic combustion gas sensor; the other is a semiconductor gasoline volatile gas sensor. Semiconductor sensors are divided into three types: physi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/00
Inventor 孔祥吉
Owner 北京东方吉华科技有限公司