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A kind of solid electrolyte for phosphorus determination probe and preparation method thereof

A solid electrolyte and a technology for preparation steps are applied in the field of solid electrolytes for phosphorus determination probes, which can solve the problems of field application limitations, easy falling off of auxiliary electrode materials, unsuitable stability and thermal shock resistance, etc., so as to reduce sintering energy consumption, Better thermal shock resistance and better stability

Active Publication Date: 2021-09-07
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in actual use, its field application is limited due to the fact that the auxiliary electrode material is easy to fall off.
[0004] Fisher (FISCHER W A, JANKE D. Metallurgische Electrochemie, Stahleisen, Düsseldorf[M]. Berlin: Springer-Verlag, 1975: 321-344.) reported 65%CaO + 35%4CaO∙P 2 o 5 Solid electrolyte materials are used in phosphorus sensors to measure phosphorus in metal melts, but their relative stability and thermal shock resistance are not suitable for solid electrolytes in phosphorus determination probes

Method used

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  • A kind of solid electrolyte for phosphorus determination probe and preparation method thereof

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Embodiment 1

[0014] A solid electrolyte for phosphorus determination probe, the chemical composition is 25%CaO + 75% 4CaO∙P 2 o 5 .

[0015] A method for preparing a solid electrolyte for a phosphorus-fixing probe, the specific steps of which are as follows.

[0016] (1) Take the corresponding CaCO according to the molar ratio of 2.09:1 3 and CaHPO 4 ∙2H 2 O powder, mechanically mixed uniformly, the particle median diameter of the obtained mixed powder is 24 microns.

[0017] (2) Heat the mixed powder in step (1) to 1350°C at a heating rate of 4°C / min, then sinter for 1h, and then cool to room temperature in a dry air atmosphere to obtain a solid electrolyte for phosphorus determination probes .

Embodiment 2

[0019] A solid electrolyte for phosphorus determination probe, the chemical composition is 35%CaO + 65% 4CaO∙P 2 o 5 .

[0020] A method for preparing a solid electrolyte for a phosphorus-fixing probe, the specific steps of which are as follows.

[0021] (1) Weigh the corresponding CaCO at a molar ratio of 2.76:1 3 and CaHPO 4 ∙2H 2 O powder, mechanically mixed uniformly, the particle median diameter of the obtained mixed powder is 28 microns.

[0022] (2) Heat the mixed powder in step (1) to 1400°C at a heating rate of 5°C / min, then sinter for 5h, and then cool to room temperature in a dry air atmosphere to obtain a solid electrolyte for phosphorus determination probes .

Embodiment 3

[0024] A solid electrolyte for phosphorus determination probe, the chemical composition is 40%CaO + 60% 4CaO∙P 2 o 5 .

[0025] A method for preparing a solid electrolyte for a phosphorus-fixing probe, the specific steps of which are as follows.

[0026] (1) Take the corresponding CaCO according to the molar ratio of 3.18:1 3 and CaHPO 4 ∙2H 2 O powder, mechanically mixed uniformly, the particle median diameter particle size of the obtained mixed powder is 34 microns.

[0027] (2) Heat the mixed powder in step (1) to 1450°C at a heating rate of 3°C / min, then sinter for 3 hours, and then cool to room temperature in a dry air atmosphere to obtain a solid for phosphorus determination probes electrolyte.

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Abstract

The invention discloses a solid electrolyte for a phosphorus determination probe and a preparation method thereof, belonging to the technical field of phosphorus determination probe preparation. Aiming at the problem that the auxiliary electrode in the existing sensor is easy to fall off, etc., the present invention proposes a solid electrolyte for the phosphorus determination probe in the metal melt, which consists of CaO+4CaO·P 2 o 5 Material composition, wherein the CaO content is less than 60%. The solid electrolyte material prepared by the invention has better thermal shock resistance and ideal electrical conductivity, and can be applied to the detection of phosphorus in various metal melts, especially copper and iron metal melts.

Description

technical field [0001] The invention relates to the technical field of solid electrolyte electrochemical sensors, in particular to a solid electrolyte for a phosphorus determination probe. Background technique [0002] Phosphorus is one of the removed elements in metal smelting, which is prone to segregation, resulting in cold and brittle and affecting the quality of the metal. In the later stage of smelting, phosphorus will also be returned, which has a great impact on the end point control of the metal smelting process. Rapid testing of phosphorus content is the basis for the key control of smelting, and it is also particularly important. The current detection methods in the smelting process are divided into chemical methods and spectroscopic methods. Among them, the chemical method requires sampling, weighing, dissolution, and titration, which takes a long time and restricts on-site guidance for production; while the application of spectroscopic methods saves time relativ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/447C04B35/057
CPCC04B35/057C04B35/447C04B2235/442C04B2235/96
Inventor 康雪侯剑峰滕飞孙桂芳王常珍
Owner 东北大学秦皇岛分校