Barium zirconate/magnesium oxide composite ceramic material and preparation method thereof
A technology of composite ceramics and barium zirconate, applied in the field of composite ceramic materials, can solve the problems of low normal temperature mechanical properties of composite materials, high normal temperature thermal conductivity, easy occurrence of volume effect, etc., and achieves low cost, reduced normal temperature thermal conductivity, production low cost effect
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Embodiment 1
[0046] A barium zirconate / magnesia composite ceramic material and a preparation method thereof. The steps of the preparation method described in this embodiment are:
[0047] Step 1. According to the molar ratio of barium source: zirconium source is 1:1, the barium source and the zirconium source are mixed, dry ball milled for 3 hours, kept at 1200°C for 3 hours, cooled with the furnace, crushed to obtain Pre-sintered barium zirconate powder.
[0048] Step 2, according to the mass ratio of the calcined barium zirconate powder: the fused magnesia fine powder is 1:5, the described calcined barium zirconate powder and the described fused magnesia fine powder are mixed to obtain Mixture I.
[0049] According to the mass ratio of fused magnesia particles I: fused magnesia particles II being 1:0.4, the fused magnesia particles I and the fused magnesia particles II are mixed to obtain the mixture II.
[0050] Step 3. According to the mass ratio of the mixture I: the mixture II bei...
Embodiment 2
[0057] A barium zirconate / magnesia composite ceramic material and a preparation method thereof. The steps of the preparation method described in this embodiment are:
[0058] Step 1. According to the molar ratio of barium source: zirconium source is 1:1, the barium source and the zirconium source are mixed, dry ball milled for 3.5 hours, kept at 1300°C for 3.5 hours, cooled with the furnace, crushed, The calcined barium zirconate powder is obtained.
[0059] Step 2, according to the mass ratio of the calcined barium zirconate powder: fused magnesia fine powder is 1: 2, the described calcined barium zirconate powder and the described fused magnesia fine powder are mixed to obtain Mixture I.
[0060] According to the mass ratio of fused magnesia particles I: fused magnesia particles II being 1:0.5, the fused magnesia particles I and the fused magnesia particles II are mixed to obtain the mixture II.
[0061] Step 3. According to the mass ratio of the mixture I: the mixture II...
Embodiment 3
[0068] A barium zirconate / magnesia composite ceramic material and a preparation method thereof. The steps of the preparation method described in this embodiment are:
[0069] Step 1. According to the molar ratio of barium source: zirconium source is 1:1, the barium source and the zirconium source are mixed, dry ball milled for 3.5 hours, kept at 1400°C for 3.5 hours, cooled with the furnace, crushed, The calcined barium zirconate powder is obtained.
[0070] Step 2, according to the mass ratio of the calcined barium zirconate powder: fused magnesia fine powder is 1: 1, the described calcined barium zirconate powder and the described fused magnesia fine powder are mixed to obtain Mixture I.
[0071] According to the mass ratio of fused magnesia particles I: fused magnesia particles II being 1:0.6, the fused magnesia particles I and the fused magnesia particles II are mixed to obtain the mixture II.
[0072] Step 3. According to the mass ratio of the mixture I: the mixture II...
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Abstract
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