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Niobium oxide doped barium calcium zirconate titanate leadless piezoelectric ceramic powder material

A barium calcium zirconate titanate and lead-free piezoelectric technology is applied in the field of environmentally friendly lead-free piezoelectric ceramics, which can solve the problem that performance parameters cannot be achieved at the same time, the comprehensive electrical properties of lead-free piezoelectric ceramics are poor, and the electromechanical coupling coefficient is low. and other problems, to achieve the effect of promoting domain wall motion, excellent performance, and low dielectric loss

Inactive Publication Date: 2013-10-30
GUIZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a lead-free piezoelectric ceramic powder material of barium calcium zirconate titanate doped with niobium oxide, which can solve the problems existing in the prior art, especially the comprehensive electrical properties of lead-free piezoelectric ceramics Poor (i.e. piezoelectric constant d 33 Small, electromechanical coupling coefficient k p low, high dielectric loss tanδ, or these three performance parameters cannot reach an excellent level at the same time)

Method used

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  • Niobium oxide doped barium calcium zirconate titanate leadless piezoelectric ceramic powder material

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Embodiment 1

[0022] Embodiment 1: A kind of barium zirconate calcium titanate lead-free piezoelectric ceramic powder material doped with niobium oxide, the chemical general formula of its component is Ba 0.85 Ca 0.15 Ti 0.895-x Zr 0.1 mn 0.005 Nb x o 3 , where x is the number of atoms in the ceramic system where Ti atoms are replaced by Nb atoms; it is prepared by the following method: according to the general chemical formula Ba 0.85 Ca 0.15 Ti 0.895-x Zr 0.1 mn 0.005 Nb x o 3 The stoichiometric ratio of the elements in the medium weighs the raw material BaCO 3 62.671g, ZrO 2 4.603g, TiO 2 26.778g, CaCO 3 5.614g, MnO 2 0.163g and Nb 2 o 5 0.0g; use absolute ethanol as the medium to ball mill the aforementioned raw materials for 12 hours, dry the ball-milled slurry to obtain dry powder; place the dry powder in the air and pre-calcine at 1200°C for 2 hours to obtain Ba 0.85 Ca 0.15 Ti 0.895-x Zr 0.1 mn 0.005 Nb x o 3 powder; wherein, x is 0.

[0023] A niobiu...

Embodiment 2

[0025] Embodiment 2: A kind of barium zirconate calcium titanate lead-free piezoelectric ceramic powder material doped with niobium oxide, the chemical general formula of its component is Ba 0.85 Ca 0.15 Ti 0.895-x Zr 0.1 mn 0.005 Nb x o 3 , where, x is the number of atoms in the ceramic system where Ti atoms are replaced by Nb atoms; it is prepared by the following method: Weigh the raw material BaCO 3 62.514g, ZrO 2 4.592g, TiO 2 26.558g, CaCO 3 5.600g, MnO 2 0.162g and Nb 2 o 5 0.251g; use absolute ethanol as the medium to wet grind the aforementioned raw materials for 11 hours, dry the ball-milled slurry to obtain dry powder; place the dry powder in the air and pre-calcine at 1100°C for 1 hour to obtain Ba 0.85 Ca 0.15 Ti 0.895-x Zr 0.1 mn 0.005 Nb x o 3 Powder, where x is 0.005.

[0026]A niobium oxide-doped barium calcium zirconate titanate lead-free piezoelectric ceramic, which is prepared by the following method: taking the above-mentioned niob...

Embodiment 3

[0028] Embodiment 3: A kind of niobium oxide doped barium zirconate calcium titanate lead-free piezoelectric ceramic powder material, the chemical general formula of its component is Ba 0.85 Ca 0.15 Ti 0.895-x Zr 0.1 mn 0.005 Nb x o 3 , where x is the number of atoms in the ceramic system where Ti atoms are replaced by Nb atoms. Prepared by the following method: Weigh the raw material BaCO 3 62.356g, ZrO 2 4.580g, TiO 2 26.338g, CaCO 3 5.586g, MnO 2 0.162g and Nb 2 o 5 0.502g; use absolute ethanol as the medium to wet grind the aforementioned raw materials for 15 hours, dry the ball-milled slurry to obtain dry powder; place the dry powder in the air and pre-calcine at 1300°C for 4 hours to obtain Ba 0.85 Ca 0.15 Ti 0.895-x Zr 0.1 mn 0.005 Nb x o 3 Powder, where x is 0.01.

[0029] A niobium oxide-doped barium calcium zirconate titanate lead-free piezoelectric ceramic, which is prepared by the following method: taking the above-mentioned niobium oxide-d...

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Abstract

The invention discloses a niobium oxide doped barium calcium zirconate titanate leadless piezoelectric ceramic powder material which is prepared through the following method comprising the steps of: weighting raw materials BaCO3, ZrO2, TiO2, CaCO3, MnO2 and Nb2O5 according to the stoichiometric ratio of elements in the chemical general formula: Ba0.85Ca0.15Ti0.895-xZr0.1Mn0.005NbxO3; carrying out ball milling on the raw materials for 10-16h by taking absolute ethyl alcohol as a medium, and drying the ball-milled slurry to obtain dry powder; and placing the dry powder into the air, and pre-sintering the dry powder at the temperature of 1100-1300 DEG C for 1-4h to obtain the niobium oxide doped barium calcium zirconate titanate leadless piezoelectric ceramic powder material. The Ba0.85Ca0.15Ti0.895-xZr0.1Mn0.005NbxO3 leadless piezoelectric ceramic with a perovskite type structure, which is obtained by using the traditional solid state sintering method and industrial raw materials, has more excellent performance. Shown by mass data statistics, the leadless piezoelectric ceramic prepared by using the niobium oxide doped barium calcium zirconate titanate leadless piezoelectric ceramic powder material disclosed by the invention has the piezoelectric constant d33 of 335pC / N, the electromechanical coupling factor kp of 39.5% and the dielectric loss of less than 2%. In addition, the niobium oxide doped barium calcium zirconate titanate leadless piezoelectric ceramic powder material is stable in preparation process and better in industrial prospect.

Description

technical field [0001] The invention relates to a niobium oxide-doped barium calcium zirconate titanate lead-free piezoelectric ceramic powder material, which belongs to the field of environment-friendly lead-free piezoelectric ceramics. Background technique [0002] In the past few decades, lead-based piezoelectric ceramics have always been an important piezoelectric ceramic system and have been widely used as sensors, Various devices such as transducers, piezoelectric transformers, ultrasonic motors and filters. However, due to the formulation of such materials, PbO (or Pb 3 o 4 ) content reached 60% to 70% of the total weight of the material, and the volatility of Pb would cause a certain degree of damage to the environment during production, device use and subsequent treatment, and it would also cause chronic lead poisoning , dizziness, nausea, neurasthenia and even brain damage and other symptoms. On July 1, 2006, the European Union promulgated the "RoHS" directive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/626
Inventor 刘其斌张诚
Owner GUIZHOU UNIV
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