Lead-free compact strontium postasium niobate textured ceramic and preparation method thereof

A technology of potassium strontium niobate and texture, applied in the field of lead-free ferroelectric ceramics, can solve problems such as environmental pollution, achieve the effects of good reproducibility and stability, inhibition of abnormal growth, and simple steps

Active Publication Date: 2013-12-04
陕西翱翔天宇新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems that the existing ferroelectric ceramics cause pollution to the environment due to lead content, and increase the density of lead-free ferroelectric textured ceramics, the present invention proposes a lead-free dense textured ceramics with strontium potassium niobate and its preparation method

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  • Lead-free compact strontium postasium niobate textured ceramic and preparation method thereof
  • Lead-free compact strontium postasium niobate textured ceramic and preparation method thereof
  • Lead-free compact strontium postasium niobate textured ceramic and preparation method thereof

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Embodiment 1

[0028] This embodiment is a lead-free potassium strontium niobate ceramic with a dense texture, and all oriented grains are evolved from needle-shaped potassium strontium niobate microcrystals. The original powder is acicular potassium strontium niobate microcrystalline powder, sintering aid, organic solvent and binder, of which:

[0029] Needle-shaped potassium strontium niobate microcrystalline powder is prepared from strontium carbonate, niobium pentoxide and potassium chloride by molten salt method.

[0030] The molar ratio of strontium carbonate to niobium pentoxide is 1:1.25, and potassium chloride is 1.5 times the weight of the mixture of strontium carbonate and niobium pentoxide. The sintering aid is bismuth trioxide, which is 4% of the weight of the needle-like potassium strontium niobate microcrystalline powder; the organic solvent is made of toluene and alcohol with a weight ratio of 2:1, and is the 50% of the weight of the crystal powder, and the binder adopts F51...

Embodiment 2

[0045] This embodiment is a lead-free potassium strontium niobate ceramic with a dense texture, and all oriented grains are evolved from needle-shaped potassium strontium niobate microcrystals. The original powder is acicular potassium strontium niobate microcrystalline powder, sintering aid, organic solvent and binder, of which:

[0046] Acicular strontium potassium niobate microcrystalline powder is prepared from strontium carbonate, niobium pentoxide and potassium chloride by molten salt method, wherein the molar ratio of strontium carbonate to niobium pentoxide is 1:1.25, Potassium chloride is 1.5 times the weight of the mixture of strontium carbonate and niobium pentoxide. The sintering aid is bismuth trioxide, which is 6% of the weight of the needle-shaped potassium strontium niobate microcrystalline powder; 60% of the weight of the crystal powder, and the binder adopts F518N ceramic powder binder produced in Fuzhou, which is 40% of the weight of the needle-like stronti...

Embodiment 3

[0061] This embodiment is a lead-free potassium strontium niobate ceramic with a dense texture, and all oriented grains are evolved from needle-shaped potassium strontium niobate microcrystals. The original powder is acicular potassium strontium niobate microcrystalline powder, sintering aid, organic solvent and binder, of which:

[0062] Acicular strontium potassium niobate microcrystalline powder is prepared from strontium carbonate, niobium pentoxide and potassium chloride by molten salt method, wherein the molar ratio of strontium carbonate to niobium pentoxide is 1:1.25, Potassium chloride is 1.5 times the weight of the mixture of strontium carbonate and niobium pentoxide. The sintering aid is bismuth trioxide, which is 2% of the weight of the needle-shaped potassium strontium niobate microcrystalline powder; the organic solvent is made of toluene and alcohol with a weight ratio of 2:1, which is the 60% of the weight of the crystal powder body, the binder adopts the F518...

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Abstract

The invention discloses a lead-free compact strontium postasium niobate textured ceramic and a preparation method thereof. The preparation method of the lead-free compact strontium postasium niobate textured ceramic comprises the following steps: using acicular strontium postasium niobate microcrystalline powder, a sintering aid, an organic solvent and a binder as raw materials, synthesizing acicular ceramic strontium postasium niobate microcrystalline powder by adopting a molten-salt growth method; mixing the acicular strontium postasium niobate microcrystalline powder with the sintering aid, the organic solvent and the binder to obtain slurry with certain viscosity; casting the slurry into films; obtaining biscuit sample wafers through laminating, hot isostatic pressing and cutting of the films; after debinding, sintering to finally obtain the lead-free compact strontium postasium niobate textured ceramic. The lead-free compact strontium postasium niobate textured ceramic and the preparation method have the advantages that the process is simple; the formulation deviation is small; the lead-free compact strontium postasium niobate textured ceramic is good in repeatability and stability; existing chip-type electronic component producing equipment can be used; the lead-free compact strontium postasium niobate textured ceramic and the preparation method are easy to industrialize.

Description

technical field [0001] The invention relates to the field of lead-free ferroelectric ceramics in material science, in particular to strontium potassium niobate lead-free piezoelectric textured ceramics and a preparation method thereof. Background technique [0002] Ferroelectric materials are an important class of functional materials, which have important properties such as dielectricity, piezoelectricity, pyroelectricity, ferroelectricity, electro-optic effect, acousto-optic effect, photorefractive effect and nonlinear optical effect. It can be used to make important new components such as ferroelectric memories, pyroelectric infrared detectors, spatial light modulators, optical waveguides, dielectric phase shifters, and voltage-controlled filters. As countries around the world pay more attention to environmental protection, lead-free ferroelectric materials are bound to be used to replace traditional lead-containing ceramic materials to reduce environmental pollution. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622C04B35/64C04B35/63
Inventor 高峰刘亮亮李金锦胡国辛
Owner 陕西翱翔天宇新材料科技有限公司
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