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Yttrium tantalate high-temperature ceramic and preparation method thereof

A technology of high-temperature ceramics and yttrium tantalate, which is applied in the field of preparation of yttrium tantalate high-temperature ceramics and yttrium tantalate high-temperature ceramics, can solve problems such as affecting performance, and achieve the effects of low preparation cost, good ferroelasticity and good stability

Active Publication Date: 2016-11-30
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] About yttrium tantalate (YTaO 4 ) high-temperature ceramic material preparation process, Wang Fuzhi and others used yttrium oxide (Y 2 o 3 ), tantalum oxide (Ta 2 o 5 ) as raw material, adding co-solvent (LiCO 3 ) sintered into yttrium tantalate (YTaO 4 ), but once sintered, the added co-solvent (LiCO 3 ) will introduce certain impurities
Chinese patent ZL00126047.2 adds lithium sulfate-sodium sulfate mixed flux to tantalum oxide, yttrium oxide and strontium carbonate oxide to sinter into tantalate, but this method will also introduce some impurity phases, thus affecting its performance

Method used

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  • Yttrium tantalate high-temperature ceramic and preparation method thereof
  • Yttrium tantalate high-temperature ceramic and preparation method thereof
  • Yttrium tantalate high-temperature ceramic and preparation method thereof

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Embodiment 1

[0032] A new type of high temperature resistance, anti-oxidation, anti-wear yttrium tantalate (YTaO) described in this embodiment 4 ) ceramic material and preparation method thereof, specifically comprising the following steps:

[0033] Weigh 8.0611g of yttrium oxide and 15.7749g of tantalum oxide, mix them in absolute ethanol, place them in a planetary ball mill (the speed of the ball mill is 300, and the milling time is 180min), and dry the milled solution at 60°C After 24 hours, pass through a 100-mesh sieve, and then use a mold to press into shape (holding pressure is 8MPa, holding time is 60min). After pressing, it is pre-fired at 1100°C for 5 hours.

[0034] After calcining the raw material for the first time, the mixture is ground evenly, dissolved in absolute ethanol again, and placed in a planetary ball mill for ball milling (the rotating speed of the ball mill is 300r / min, and the ball milling time is 180min), and the solution that is ball milled is placed in the pla...

Embodiment 2

[0036] A new type of high temperature resistance, anti-oxidation, anti-wear yttrium tantalate (YTaO) described in this embodiment 4 ) ceramic material and preparation method thereof, specifically comprising the following steps:

[0037] Weigh 8.0611g of yttrium oxide and 15.7749g of tantalum oxide, mix them in absolute ethanol, place them in a planetary ball mill for ball milling (the speed of the ball mill is 500r / min, and the ball milling time is 60min), and the milled solution is heated at 80°C After drying for 10 hours, pass through a 300-mesh sieve, and then use a mold to press and form (holding pressure is 12MPa, holding time is 30min), after pressing and forming, it is pre-fired at 800°C for 10 hours.

[0038] After calcining the raw material for the first time, the mixed material is ground evenly, dissolved in absolute ethanol again, placed in a planetary ball mill for ball milling (the rotating speed of the ball mill is 500r / min, and the ball milling time is 60min), a...

Embodiment 3

[0041] A new type of high temperature resistance, anti-oxidation, anti-wear yttrium tantalate (YTaO) described in this embodiment 4 ) ceramic material and preparation method thereof, specifically comprising the following steps:

[0042] Specifically include the following steps:

[0043] Weigh 8.0611g of yttrium oxide and 15.7749g of tantalum oxide, mix them in absolute ethanol, place them in a planetary ball mill for ball milling (the speed of the ball mill is 400r / min, and the ball milling time is 120min), and the milled solution is heated at 70°C After drying for 16 hours, pass through a 200-mesh sieve, and then use a mold to press and form (the holding pressure is 9MPa, and the holding time is 40min). After pressing and forming, it is pre-fired at 900°C for 9 hours.

[0044] After calcining the raw material for the first time, the mixed material is ground evenly, dissolved in absolute ethanol again, placed in a planetary ball mill for ball milling (the rotating speed of th...

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Abstract

The invention discloses a method for preparing an yttrium tantalate high-temperature ceramic through a solid phase method, wherein the molecular formula of the compound yttrium tantalate is YTaO4. According to the preparation method, the used raw materials are yttrium oxide and tantalum oxide; and the method comprises: weighing the raw materials according to a certain ratio, mixing the raw materials in anhydrous ethanol, placing into a planetary ball mill, carrying out ball milling to achieve a uniformly-mixing state, drying the mixed powder, screening, placing into a mold, compacting, pre-sintering, cooling, taking out the pre-sintered sample, grinding, carrying out ball milling, drying, screening, placing the screened powder into the mold, compacting, and carrying out secondary sintering. According to the present invention, the product purity of the process is high, the impurity content is low, the product preparation cost is low, the method is suitable for mass production, and the target product is expected to be used as the novel high-temperature resistant, anti-oxidation and anti-wear ceramic material.

Description

technical field [0001] The invention belongs to the technical field of high-temperature materials, and in particular relates to a yttrium tantalate high-temperature ceramic, and also relates to a preparation method of the yttrium tantalate high-temperature ceramic. Background technique [0002] About yttrium tantalate (YTaO 4 ) research, as early as 1970, Blasse et al. studied the M-type YTaO 4 The luminescence properties of powders excited by ultraviolet light, and found that there is an energy transfer between the matrix and the activator ions during the luminescence process. In 1973, he studied the M-type YTaO 4 In the early 1980s, Brixner et al. studied the M' type YTaO 4 The luminescent properties of the powders, their effect on NbO 4 3- In YTaO 4 The luminescence in the powder is discussed in detail, and the Eu 3+ , Tb 3+ ion-activated YTaO 4 The luminescence of powders has been studied; since 1999, Li Bo et al. have studied the M' type YTaO 4 Powder single do...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/64C04B35/622C04B35/626
CPCC04B35/495C04B35/622C04B35/62615C04B35/64C04B2235/9607C04B2235/661
Inventor 冯晶蒋业华周荣汪俊
Owner KUNMING UNIV OF SCI & TECH
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