An ultrahigh temperature zirconia oxygen sensor

Abstract

The utility model relates to an ultrahigh temperature straight insertion type zirconium oxide oxygen sensor, including zirconium oxide sensitive element, ceramic ring sealing part and alumina pipe, its characterized in that: the shape of zirconium oxide sensitive element is the tubular of one end closed, one end opening, and the tubular zirconium oxide sensitive element is connected with alumina pipe through ceramic ring sealing part, and is sintered into a whole above 1600 DEG C. The zirconium oxide oxygen sensor of the utility model can directly use in 1500 DEG C's ultrahigh temperature atmosphere and carry out oxygen measurement, and the cost is 1 / 3 of the sensor of using entire zirconium oxide pipe.

Description

Technical Field

[0001] This utility model relates to an ultra-high temperature direct-insertion zirconia oxygen sensor. Background Technology

[0002] Zirconia oxygen sensors operate at temperatures above 600°C, with some specialized applications reaching 1400°C. These sensors require direct insertion into ultra-high temperature atmospheres, such as those found in glass furnaces. Because glass furnaces contain large amounts of alkaline substances, these substances are in a gaseous state above 1300°C, but melt below 1300°C, clogging the surface of the sensor's sensitive element and causing it to malfunction. Patent CN102262120A discloses a zirconia sensor, but its sealing material has a sintering temperature of only 1300°C and an operating temperature below 1000°C, making it unsuitable for such ultra-high temperature environments. Furthermore, this disclosed sensitive element is sheet-like, with a limited reaction area, making it easily covered by contaminants and prone to failure. Another design uses a single zirconia tube as the sensor. While effective, this method is hampered by the difficulty in molding and sintering yttrium-doped zirconia, limiting the overall length of the tube and resulting in high costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the problems of the aforementioned patent CN102262120A, such as the inability to use it at temperatures above 1300℃, the susceptibility of the sheet-like sensitive element to being covered by contaminants and causing it to fail, and the high cost of using the entire zirconia tube as the sensor. This invention provides an ultra-high temperature direct-insertion zirconia oxygen sensor that can be directly used for oxygen measurement in an ultra-high temperature atmosphere of 1500℃, and at a cost of 1 / 3 that of using the entire zirconia tube as the sensor.

[0004] The present invention adopts the following technical solution:

[0005] An ultra-high temperature direct-insertion zirconia oxygen sensor includes a zirconia sensing element, a ceramic annular sealing component, and an alumina tube. The zirconia sensing element is tubular with one end closed and the other end open. The tubular zirconia sensing element is connected to the alumina tube through the ceramic annular sealing component and sintered into a whole at a temperature above 1600°C.

[0006] The alumina tube is open at both ends.

[0007] The ceramic annular sealing component is made of alumina ceramic with a purity of ≥99%.

[0008] The zirconia oxygen sensor of this invention can be directly used for oxygen measurement in an ultra-high temperature atmosphere of 1500℃, and the cost is only 1 / 3 of that of using an entire zirconia tube as the sensor. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0010] The present invention will be further described in detail below with reference to specific embodiments.

[0011] like Figure 1 As shown, this utility model discloses an ultra-high temperature direct-insertion zirconia oxygen sensor, comprising a zirconia sensing element 1, a ceramic annular sealing component 2, and an alumina tube 3. The zirconia sensing element 1 is tubular in shape, closed at one end and open at the other. The tubular zirconia sensing element 1 is connected to the alumina tube 3 via the ceramic annular sealing component 2 and sintered into a single unit at a temperature above 1600℃. Both ends of the alumina tube 3 are open. The ceramic annular sealing component is made of alumina ceramic with a purity ≥99%. The zirconia sensing element 1, ceramic annular sealing component 2, and alumina tube 3 of this utility model are all readily available for purchase.

[0012] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A high-temperature direct-insertion zirconia oxygen sensor, comprising a zirconia sensing element (1), a ceramic annular sealing component (2), and an alumina tube (3), characterized in that: The zirconia sensing element (1) is a tubular shape with one end closed and the other end open. The tubular zirconia sensing element (1) is connected to the alumina tube (3) through a ceramic ring sealing component (2) and sintered into a whole at a temperature above 1600°C.

2. The ultra-high temperature zirconia oxygen sensor of claim 1, wherein: The alumina tube (3) has openings at both ends.

3. The ultra-high temperature zirconia oxygen sensor of claim 1, wherein: The ceramic annular sealing component is made of alumina ceramic with a purity of ≥99%.

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