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Method for regulating and controlling phase transition temperature and piezoelectric property of barium titanium silicate crystal, and shear type vibration sensor

A piezoelectric performance, titanium silicate technology, applied in the field of piezoelectric materials and sensing, can solve the problems that limit the application of BTS crystals, and achieve the effect of improving temperature stability

Active Publication Date: 2021-12-03
山东本源晶体科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors found that the crystal has a commensurate-incommensurate phase transition at about 170°C, and the thickness shear piezoelectric coefficient d 15 significant impact, severely limiting the application of BTS crystals in shear-type piezoelectric vibration sensors

Method used

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  • Method for regulating and controlling phase transition temperature and piezoelectric property of barium titanium silicate crystal, and shear type vibration sensor
  • Method for regulating and controlling phase transition temperature and piezoelectric property of barium titanium silicate crystal, and shear type vibration sensor
  • Method for regulating and controlling phase transition temperature and piezoelectric property of barium titanium silicate crystal, and shear type vibration sensor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of Ba 1.8 Sr 0.2 TiSi 2 o 8 the crystal

[0036] 1) BaCO 3 ,SrCO 3 , TiO 2 , SiO 2 The four raw materials are dried in a drying oven to remove moisture and prevent the deviation of the proportion of ingredients. According to the general formula BaCO 3 : SrCO 3 : TiO 2 : SiO 2 =0.36:0.04:0.2:0.4 molar ratio configuration raw materials, and then add an excess of 2% TiO 2 After weighing, the raw materials are mixed with a mixer for 24 hours, then placed in a muffle furnace at 1000°C for 12 hours, and after cooling down, they are ground with a mortar and pressed into a suitable size block with a press machine, and finally Put it into a muffle furnace and bake at 1250°C for 36 hours to obtain strontium barium titanium silicate (Ba 1.8 Sr 0.2 TiSi 2 o 8 ) polycrystalline material;

[0037]2) The crystal is grown by the pulling method, using the above-mentioned polycrystalline material, and placed in a platinum or iridium crucible. Vacuumize the si...

Embodiment 2

[0043] Preparation of Ba 1.6 Sr 0.4 TiSi 2 o 8

[0044] 1) BaCO 3 ,SrCO 3 , TiO 2 , SiO 2 The four raw materials are dried in a drying oven to remove moisture and prevent inaccurate ingredients. According to the general formula BaCO 3 : SrCO 3 : TiO 2 : SiO 2 =0.32:0.08:0.2:0.4 molar ratio configuration raw materials, and then add an excess of 2% TiO 2 After weighing, the raw materials are mixed with a mixer for 24 hours, then placed in a muffle furnace at 1000°C for 12 hours, and after cooling down, they are ground with a mortar and pressed into a suitable size block with a press machine, and finally Put it into a muffle furnace and bake at 1250°C for 36 hours to obtain strontium barium titanium silicate (Ba 1.6 Sr 0.4 TiSi 2 o 8 ) polycrystalline material;

[0045] 2) The crystal is grown by the pulling method, using the above-mentioned polycrystalline material, and placed in a platinum or iridium crucible. Vacuumize the single crystal furnace, fill it with ...

Embodiment 3

[0051] Preparation of Ba 1.4 Sr 0.6 TiSi 2 o 8

[0052] 1) BaCO 3 ,SrCO 3 , TiO 2 , SiO 2 The four raw materials are dried in a drying oven to remove moisture to prevent inaccurate ingredients. According to the general formula BaCO 3 : SrCO 3 : TiO 2 : SiO 2 =0.28:0.12:0.2:0.4 molar ratio configuration raw materials, and then add an excess of 2% TiO 2 After weighing, the raw materials are mixed with a mixer for 24 hours, then placed in a muffle furnace at 1000°C for 12 hours, and after cooling down, they are ground with a mortar and pressed into a suitable size block with a press machine, and finally Put it into a muffle furnace and bake at 1250°C for 36 hours to obtain strontium barium titanium silicate Ba 1.4 Sr 0.6 TiSi 2 o 8 polycrystalline material;

[0053] 2) The crystal is grown by the pulling method, using the above-mentioned polycrystalline material, and placed in a platinum or iridium crucible. Vacuumize the single crystal furnace, fill it with prot...

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Abstract

The invention discloses a method for regulating and controlling phase transition temperature and piezoelectric property of a barium titanium silicate crystal, and a shear type vibration sensor. The method comprises the following steps: batching materials prepared according to the stoichiometric ratio in a general formula, and preparing a polycrystal material, wherein the general formula of titanium strontium barium silicate is Ba2-xSrxTiSi2O8, and x is larger than 0.1 and smaller than 1.0; and melting the polycrystal material, adding a seed crystal which is a barium titanium silicate seed crystal to grow a crystal, and annealing the grown crystal to obtain the barium strontium titanium silicate crystal, wherein the direction of the seed crystal is a Z direction. The dielectric and piezoelectric properties and the temperature stability of the prepared strontium-doped barium titanium silicate crystal are greatly improved compared with those of an undoped barium titanium silicate crystal, and the piezoelectric sensitivity of a shear type vibration sensor prepared from the barium titanium silicate crystal has excellent temperature stability within the range of room temperature to 600 DEG C.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric materials and sensing, and in particular relates to a method for regulating and controlling the phase transition temperature and piezoelectric performance of barium titanium silicate crystal and a shear vibration sensor. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] High-temperature piezoelectric single crystal materials for structural health monitoring have been a research hotspot in recent years. The high-temperature vibration sensor made of high-temperature piezoelectric single crystal can realize real-time measurement of vibration signals, complete structural state diagnosis, facilitate timely maintenance of key structures, reduce operating costs, and improve system safety and reliability. There are still some technical deficiencies in high-temperature appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/34C30B15/36C30B33/02H01L41/187G01H11/08H10N30/853
CPCC30B29/34C30B15/36C30B33/02G01H11/08H10N30/8536
Inventor 于法鹏姜超李妍璐孙丽赵显
Owner 山东本源晶体科技有限公司