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

A technology of solid electrolyte and preparation steps, which is applied in the field of lanthanum-doped solid electrolyte for phosphorus determination probes, can solve problems such as affecting the measurement rate, easy falling off of auxiliary electrode materials, and field application limitations.

Active Publication Date: 2021-06-15
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual use, because the auxiliary electrode material is easy to fall off, which affects the measurement rate, the field application is limited

Method used

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

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Embodiment 1

[0017] A kind of lanthanum-doped solid electrolyte for phosphorus determination probe, the general formula of said electrolyte is 4Ca 1-x La x o 1+a ∙P 2 o 5 , x=0.1.

[0018] A method for preparing a lanthanum-doped solid electrolyte for a phosphorus-fixing probe comprises the following steps.

[0019] (1) CaCO 3 , CaHPO 4 ∙2H 2 O and La 2 o 3 Powder, dehydrated and dried for later use.

[0020] (2) Molar ratio of CaCO 3 : CaHPO 4 ∙2H 2 O: La 2 o 3 =0.8:1:0.05 Take three kinds of spare powders and mix them uniformly by mechanical means. The median diameter of the mixed powders obtained is 10-50 microns.

[0021] (3) Heat the uniformly mixed powder in step (2) to 1450°C at a heating rate of 3°C / min for sintering, sintering for 5 hours, and cool to room temperature in a dry atmosphere to obtain a lanthanum-doped solid electrolyte for phosphorus determination probes .

Embodiment 2

[0023] A kind of lanthanum-doped solid electrolyte for phosphorus determination probe, the general formula of said electrolyte is 4Ca 1-x La x o 1+a ∙P 2 o 5 , x=0.05.

[0024] A method for preparing a lanthanum-doped solid electrolyte for a phosphorus-fixing probe comprises the following steps.

[0025] (1) CaCO 3 , CaHPO 4 ∙2H 2 O and La 2 o 3 Powder, dehydrated and dried for later use.

[0026] (2) Molar ratio of CaCO 3 : CaHPO 4 ∙2H 2 O: La 2 o 3= 0.8:1:0.025 Take three kinds of spare powders and mix them uniformly mechanically. The particle diameter of the obtained mixed powders is 20 microns.

[0027] (3) Heat the uniformly mixed powder in step (2) to 1550°C at a heating rate of 8°C / min for sintering, sinter for 5 hours, and cool to room temperature in a dry atmosphere to obtain a lanthanum-doped solid electrolyte for phosphorus determination probes .

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Abstract

The invention discloses a lanthanum-doped solid electrolyte for a phosphorus determination probe, belonging to the technical field of solid electrolyte electrochemical sensors. The general formula of the lanthanum-doped solid electrolyte of the present invention is 4Ca 1‑ x La x o 1‑a •P 2 o 5 , wherein, 0<x≤0.2, the lanthanum-doped solid electrolyte has good stability, thermal shock resistance, high electrical conductivity, and good chemical stability, and the solid electrolyte tube prepared by using it has excellent mechanical properties; at the same time, the The inventive preparation method has simple steps, easy operation and realization, and easy control of reaction conditions, thereby ensuring stable performance of the solid electrolyte. The invention 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 lanthanum-doped 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 sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/447C04B35/622C04B35/626
CPCC04B35/447C04B35/622C04B35/62605C04B2235/3208C04B2235/3227C04B2235/6562C04B2235/6567C04B2235/96
Inventor 康雪温斌王彪侯剑峰王常珍
Owner 东北大学秦皇岛分校
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