Preparation method of erbium-doped potassium sodium niobate-strontium titanate transparent ceramics

A technology of potassium sodium niobate and transparent ceramics, applied in the field of lead-free piezoelectric materials, can solve problems such as harm to the human body and the environment, and achieve the effects of reducing environmental pollution problems, good ferroelectric performance, and good repeatability

Inactive Publication Date: 2018-11-23
FUZHOU UNIV
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  • Claims
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Problems solved by technology

But PLZT ceramics contain a lot of lead, which is harmful to human body and environment

Method used

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  • Preparation method of erbium-doped potassium sodium niobate-strontium titanate transparent ceramics
  • Preparation method of erbium-doped potassium sodium niobate-strontium titanate transparent ceramics
  • Preparation method of erbium-doped potassium sodium niobate-strontium titanate transparent ceramics

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preparation example Construction

[0028] A preparation method of erbium-doped potassium sodium niobate-strontium titanate transparent ceramics, comprising the following steps:

[0029] (1) Ingredients: according to the chemical composition general formula yEr-(K 0.5 Na 0.5 )NbO 3 -xSrTiO 3 The stoichiometric ratio of the raw material Er 2 o 3 , Na 2 CO 3 , K 2 CO 3 , Nb 2 o 5 , SrCO 3 and TiO 2 Mixed to obtain a mixture, wherein x = 8 ~ 12%, y = 0.5%;

[0030] (2) Ball milling: add ball milling media to the mixture, put it into a ball mill tank for ball milling for 8-12 hours, the ball milling speed is 150-280 r / min, after the ball milling, put the mixture in an oven at 80-85°C The temperature is dried, and then the mixture is put into a mortar for grinding, the grinding medium is ethanol, and the weight ratio of the mixture to ethanol is 1:2 to 1:3;

[0031] (3) Pre-burning: Add the above-mentioned ground mixture into the crucible, after compaction, place it in a muffle furnace, raise the temper...

Embodiment 1

[0039] A preparation method of erbium-doped potassium sodium niobate-strontium titanate transparent ceramics, comprising the following steps:

[0040] (1) Ingredients: According to the general formula of chemical composition 0.005Er-(K 0.5 Na 0.5 )NbO 3 -0.12SrTiO 3 The stoichiometric ratio of the raw material Er 2 o 3 , Na 2 CO 3 , K 2 CO 3 , Nb 2 o 5 , SrCO 3 and TiO 2 Mixed to obtain a mixture.

[0041] (2) Ball milling: add the mixture into the ball milling medium, put it into a ball mill tank and carry out ball milling for 8 h at a milling speed of 150 r / min. After the ball milling, the mixture is dried in an oven at 80°C, and then Then put the mixed material into a mortar for grinding, the grinding medium is ethanol, and the weight ratio of the mixed material to ethanol is 1:2.

[0042] (3) Pre-burning: Add the above-mentioned ground mixture into the crucible, compact it, put it in a muffle furnace, raise the temperature to 800 °C at a heating rate of 3 °C / ...

Embodiment 2

[0051] A preparation method of erbium-doped potassium sodium niobate-strontium titanate transparent ceramics, comprising the following steps:

[0052] (1) Ingredients: According to the general formula of chemical composition 0.005Er-(K 0.5 Na 0.5 )NbO 3 -0.10SrTiO 3 The stoichiometric ratio of the raw material Er 2 o 3 , Na 2 CO 3 , K 2 CO 3 , Nb 2 o 5 , SrCO 3 and TiO 2 Mixed to obtain a mixture.

[0053] (2) Ball milling: Add the mixture to the ball milling medium, put it into a ball mill tank and carry out ball milling for 12 hours at a milling speed of 200r / min. Put the mixed material into a mortar for grinding, the grinding medium is ethanol, and the weight ratio of the mixed material to ethanol is 1:2.5.

[0054] (3) Pre-burning: Add the above-mentioned ground mixture into the crucible, after compaction, put it in a muffle furnace, raise the temperature to 850°C at a heating rate of 4°C / min and keep it warm for 4 hours for pre-burning , and then take out t...

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Abstract

The invention discloses a preparation method of erbium-doped potassium sodium niobate-strontium titanate transparent ceramics. The method comprises the steps of firstly, preparing Er-doped (K0.5Na0.5)NbO3-SrTiO3 powder, and tabletting and molding by means of dry pressing; shaping by microwave sintering at 1200-1230 DEG C to obtain the erbium-doped potassium sodium niobate-strontium titanate transparent ceramics with a transmittance greater than 45%. The preparation method provided by the invention is simple in processing steps, good in repeatability and easy to operate, and is mainly applied to new electronic products such as environment-friendly smartphones and touch screens as well as optical devices such as high-power solid-state lasers, high-pressure sodium lamps and thermal seekers.

Description

technical field [0001] The invention relates to the field of lead-free piezoelectric materials, in particular to a method for preparing erbium-doped potassium sodium niobate-strontium titanate transparent ceramics. Background technique [0002] Transparent ceramics have attracted considerable attention as potential candidate materials for new electronics such as smartphones and touch screens, as well as optics such as high-power solid-state lasers, high-pressure sodium lamps and heat-seeker missiles. This type of material has a wide range of uses, and the research on related application technologies is also continuous. [0003] High crystal symmetry (such as having a cubic phase structure), no pores and impurities, and high density are the main conditions for preparing transparent ceramics with high optical transmittance. Ferroelectric transparent ceramics, which combine the electrical properties of ferroelectrics and the transparency of materials, are being developed for a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622
CPCC04B35/495C04B35/622C04B2235/3201C04B2235/3213C04B2235/3224C04B2235/3236C04B2235/9653
Inventor 吴啸林锦锋姜帆林枞刘春文徐洁
Owner FUZHOU UNIV
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