Potassium sodium niobate base lead free transparent ferroelectric ceramic material and preparation method thereof

A potassium sodium niobate-based, ferroelectric ceramic technology, applied in the field of materials, can solve problems such as human body and environmental hazards, and achieve the effects of excellent performance, excellent electrical performance, and high yield

Inactive Publication Date: 2016-08-03
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, since lead-based transparent ferroelectric ceramics contain more than 70% lead, it will cause greater harm to the human body and the environment. As countries around the world gradually issue relevant laws and regulations prohibiting the use of lead-based materials, it is necessary to look for a Lead-free transparent ferroelectric ceramics are extremely urgent

Method used

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  • Potassium sodium niobate base lead free transparent ferroelectric ceramic material and preparation method thereof
  • Potassium sodium niobate base lead free transparent ferroelectric ceramic material and preparation method thereof
  • Potassium sodium niobate base lead free transparent ferroelectric ceramic material and preparation method thereof

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Embodiment 1

[0032] 1. Ingredients

[0033] According to 0.95(K 0.5 Na 0.5 )NbO 3 -0.05Sr(Mg 1 / 3 Nb 2 / 3 )O 3 The stoichiometry was weighed separately for Na with a purity of 99.99%. 2 CO 3 3.8384g of K with a purity of 99.99% 2 CO 3 5.0052g of Nb with a purity of 99.99% 2 o 5 19.9280 g of SrCO with a purity of 99.99% 3 1.1260g, purity are 99.99% MgO0.0822g, mix homogeneously, raw material mixture is packed in the nylon jar, be ball milling medium with zirconium ball, dehydrated alcohol, the mass ratio of dehydrated alcohol and raw material mixture is 1: 1.2, use a ball mill at 401 rpm for 24 hours, separate the zirconium balls, place the raw material mixture in a drying oven at 80°C for 10 hours, grind with a mortar for 30 minutes, and pass through an 80-mesh sieve.

[0034] 2. Pre-burning

[0035] Place the raw material mixture after step 1 through an 80-mesh sieve in an alumina crucible, and compact it with an agate rod so that its compacted density is 1.5g / cm 3 , cover it,...

Embodiment 2

[0047] In the batching step 1 of the present embodiment, according to 0.98 (K 0.5 Na 0.5 )NbO 3 -0.02Sr(Mg 1 / 3 Nb 2 / 3 )O 3 The stoichiometry was weighed separately for Na with a purity of 99.99%. 2 CO 3 3.9936g of K with a purity of 99.99% 2 CO 3 5. 2076g of Nb with a purity of 99.99% 2 o 5 20.3033 g of SrCO with a purity of 99.99% 3 0.4543g, 0.0207g of MgO with a purity of 99.99%, and the other steps are the same as in Example 1, to prepare a potassium sodium niobate-based lead-free transparent ferroelectric ceramic material.

Embodiment 3

[0049] In the batching step 1 of the present embodiment, according to 0.97 (K 0.5 Na 0.5 )NbO 3 -0.03Sr(Mg 1 / 3 Nb 2 / 3 )O 3 The stoichiometry was weighed separately for Na with a purity of 99.99%. 2 CO 3 3.9415g of K with a purity of 99.99% 2 CO 3 5.1397g of Nb with a purity of 99.99% 2 o 5 20.1775 g of SrCO with a purity of 99.99% 3 0.6795g, 0.0618g of MgO with a purity of 99.99%, and the other steps are the same as in Example 1 to prepare a potassium sodium niobate-based lead-free transparent ferroelectric ceramic material.

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Abstract

The invention discloses a potassium sodium niobate base lead free transparent ferroelectric ceramic material and a preparation method thereof. The formula of the ceramic material is (1-x)(K<0.5>Na<0.5>)Nb<3-x>Sr(Mg<1/3>Nb<2/3>)O3, and x represent the mole number of Sr(Mg<1/3>Nb<2/3>)O3 and is in a range of 0.02 to 0.08. The preparation method comprises steps of preparing raw materials, pre-burning, ball-milling, granulating, pressing, pressure-free sealed sintering, polishing, and silver ink firing; the ceramic material has the advantages of high light transmission, optical isotropy, strong practicality, and easy production, moreover, the preparation method is simple, the repeatability is good, and the yield is high. The test results show that when x is equal to 0.05, the optical transmission rate of the ceramic material is 60-70% in the near infrared area, at the same time, the ceramic material has good electric properties: the remnant polarization is 4.8 [mu]C/cm2, the coercive field is 7.4 kV/cm, the maximal dielectric constant is 2104, the dielectric loss is less than 0.03, and the piezoelectric constant d33 is 48 pC/N.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a potassium sodium niobate-based lead-free transparent ferroelectric ceramic material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of science and technology, in the technical fields of optical fiber communication, integrated optics and information processing, there is an urgent need for various electro-optical devices that modulate, switch and store and display optical information, so transparent ferroelectric ceramics and their Device research upsurge. [0003] Transparent ferroelectric ceramics are a type of transparent ceramics with electro-optic effects, which can be used to make electro-optic devices such as optical gates, optical modulation products, optical memories, and spectral filters. Lead-based transparent ferroelectric ceramics such as PLZT, PMN-PT, PZN-PT, PZN-PLZT, etc. have been widely u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622C04B41/88H01L41/187
CPCC04B35/495C04B35/622C04B41/5116C04B41/88C04B2235/9646C04B2235/3251C04B2235/3201C04B2235/3206C04B2235/3213H10N30/8542
Inventor 杨祖培张小帅晁小练魏灵灵
Owner SHAANXI NORMAL UNIV
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