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Potassium sodium niobate based transparent ceramic and preparation method thereof

A potassium-sodium niobate-based, transparent ceramic technology, which is applied in the field of photoelectric transparent ceramic materials, and can solve problems such as the need to improve light transmittance

Inactive Publication Date: 2017-03-29
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The problem existing in the prior art is that the light transmittance still needs to be improved

Method used

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  • Potassium sodium niobate based transparent ceramic and preparation method thereof
  • Potassium sodium niobate based transparent ceramic and preparation method thereof
  • Potassium sodium niobate based transparent ceramic and preparation method thereof

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Embodiment

[0019] Take Na 2 CO 3 、K 2 CO 3 、 Bi 2 o 3 、BaCO 3 , Nb 2 o 5 As raw material, according to chemical formula (1-x) K 0.5 Na 0.5 NbO 3 -xBaBiO 3 (x=0.08), carry out batching, and prepare potassium sodium niobate-based transparent ceramics by traditional ceramic preparation technology. All raw materials were dried in an oven at 120 °C for 5-7 h before weighing and batching. After accurate weighing, use absolute ethanol as the medium for ball milling for 24 h, and after drying, pre-calcine the obtained powder at 750 °C for 6 h at a heating rate of 1 °C / min, and then use absolute ethanol as the medium for ball milling for 16-24 h. Then dry. Pass the dried powder through a 100-mesh sieve, press it into a round billet with a diameter of 14 mm and a thickness of 0.5 mm under a pressure of 100 MPa, and sinter at 1140 ° C for 18 hours to obtain a transparent ceramic such as figure 1 shown. The measured light transmittance-frequency curve of potassium sodium niobate-based...

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Abstract

The invention provides a potassium sodium niobate based transparent ceramic. Na2CO3, K2CO3, Bi2O3, BaCO3 and Nb2O5 are used as the raw materials and blended according to the chemical formula of (1-x)K0.5Na0.5NbO3-xBaBiO3, wherein in the formula, x represents the mole content in a system and is larger than 0 and no larger than 0.08. A preparation method of the potassium sodium niobate based transparent ceramic comprises the steps that (1) all the raw materials are placed in a drying oven to be dried before being weighed and blended; (2) all the raw materials are subjected to ball milling with absolute ethyl alcohol as the medium after being accurately weighed; (3) ball milling products are taken out, dried and presintered; (4) the presintered ball milling products are dried after being subjected to ball milling with absolute ethyl alcohol as the medium; (5) dried powder is pressed into a round billet after being sieved; and (6) the pressed round billet is sintered to obtain the transparent ceramic. The potassium sodium niobate based transparent ceramic has the advantages that by adjusting the doping content of the BaBiO3, the potassium sodium niobate based transparent ceramic prepared through a traditional ceramic process can reach 75% in visible light transmittance.

Description

technical field [0001] The invention relates to the field of photoelectric transparent ceramic materials, in particular to potassium sodium niobate-based transparent ceramics and a preparation method thereof. Background technique [0002] Sodium Potassium Niobate (K 0.5 Na 0.5 NbO 3 , KNN)-based transparent ceramics have attracted much attention as solid-state laser media. Compared with single crystals, transparent ceramics are easy to prepare, can be worth large-scale samples, low cost, can achieve high-concentration doping, and are easy to prepare multilayers and composite multifunctional ceramics. [0003] KNN-based transparent ceramic is a high-performance ceramic material with excellent characteristics such as heat resistance, corrosion resistance, extremely high melting point, relatively high dielectric constant and excellent optical properties. In addition, it can be sintered by traditional ceramics. It is prepared at low cost, so it has important research signifi...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/626
CPCC04B35/495C04B35/62605C04B2235/3201C04B2235/3215C04B2235/3298C04B2235/6562C04B2235/6567C04B2235/94C04B2235/95C04B2235/9653
Inventor 江民红严亚飞宋嘉庚郝崇琰饶光辉成钢顾正飞刘心宇
Owner GUILIN UNIV OF ELECTRONIC TECH
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