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Preparation method of yttrium oxide-stabilized zirconia pelletized powder

A technology for stabilizing zirconia and yttrium oxide, which is applied in the field of preparation of yttria-stabilized zirconia granulation powder, and can solve the problems of low output rate

Active Publication Date: 2014-11-05
DONGGUAN XINBO STRUCTURAL CERAMICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional method for preparing yttria-stabilized zirconia granulated powder has a low output rate

Method used

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  • Preparation method of yttrium oxide-stabilized zirconia pelletized powder
  • Preparation method of yttrium oxide-stabilized zirconia pelletized powder

Examples

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preparation example Construction

[0022] Such as figure 1 Shown, the preparation method of the yttria stabilized zirconia granulated powder of one embodiment, comprises the steps:

[0023] S10. Mix the yttria-stabilized zirconia powder, deionized water and dispersant and then ball mill to make a slurry. The mass ratio of yttria-stabilized zirconia powder, deionized water and dispersant is 1:1~1.5:0.001~0.015 .

[0024] In this embodiment, the yttria-stabilized zirconia powder includes zirconia and yttrium oxide, wherein the mass ratio of zirconia to yttrium oxide may be 94-95.2:4.8-6.

[0025] In other embodiments, the yttria-stabilized zirconia powder includes zirconia, yttrium oxide and alumina, wherein the mass ratio of zirconia, yttrium oxide and alumina may be 94-95.2:4.8-6:0.1-0.6.

[0026] The specific surface area of ​​yttria stabilized zirconia powder can be 7m 2 / g~16m 2 / g. The yttria-stabilized zirconia powder may be yttria-stabilized zirconia calcined powder.

[0027] The yttria in the yttri...

Embodiment 1

[0044] Select the specific surface area as 9±2m 2 / g, the self-made yttria-stabilized zirconia calcined powder with an alumina addition of 0.25wt% and a yttrium oxide content of 5.4wt%.

[0045] Put 100kg of the selected yttria-stabilized zirconia calcined powder into a ball mill, add 120kg of deionized water, add 0.5kg of ammonium polyacrylate, and grind for 24 hours. The particle size D50 of the slurry after grinding is 0.5 μm to 0.7 μm.

[0046]The slurry is pumped into the stirring tank, then add 4kg of dissolved 5wt% sodium carboxymethylcellulose solution and 10kg of dissolved 10wt% PVA (polymerization degree: 1750, about 70000 molecular weight) solution, stir in the stirring tank for 4 Hour.

[0047] Use the feeding pump to pump the stirred slurry into the spray granulator for spray granulation, adjust the parameters of the spray granulator so that the inlet air temperature is controlled at 200°C and the outlet air temperature is controlled at 100°C, and the frequency o...

Embodiment 2

[0054] Select the specific surface area as 14±2m 2 / g, the homemade yttria-stabilized zirconia calcined powder with yttrium oxide content of 4.8wt%.

[0055] Put 100kg of the selected yttria-stabilized zirconia calcined powder into a ball mill, add 100kg of deionized water, add 0.1kg of CE-64, and grind for 24 hours. The particle size D50 of the slurry after grinding is 0.4 μm to 0.6 μm.

[0056] The slurry was pumped into a stirring tank, then 5 kg of dissolved 10 wt % PVA solution and 5 kg of dissolved 10 wt % B-1022 solution were added, and stirred in the stirring tank for 3 hours.

[0057] Use the feeding pump to pump the stirred slurry into the spray granulator for spray granulation, adjust the parameters of the spray granulator so that the inlet air temperature is controlled at 250°C and the outlet air temperature is controlled at 120°C, and the frequency of the feed pump is adjusted. 40Hz, atomizer speed 7000 rpm, and then spray granulation.

[0058] Pass the granulat...

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Abstract

The invention discloses a preparation method of yttrium oxide-stabilized zirconia pelletized powder. The method comprises the following steps: mixing yttrium oxide-stabilized zirconia powder, deionized water and a dispersing agent in a mass ratio 1:(1-1.5):(0.001-0.015), and performing ball milling on the mixture to obtain a sizing agent; adding a bonding agent into the sizing agent, and stirringthe mixture for 3-6 hours; and pelletizing the stirred sizing agent to obtain the yttrium oxide-stabilized zirconia pelletized powder. According to the preparation method of the yttrium oxide-stabilized zirconia pelletized powder, the ratio of the yttrium oxide-stabilized zirconia powder to the deionized water to the dispersing agent is adjusted appropriately, so that the sizing agent obtained bymeans of ball milling has appropriate solid content; and meanwhile, after the bonding agent is added and stirring is performed, the fluidity and viscosity of the sizing agent are moderate, so that the sizing agent is prevented from being stuck to a feeding tube in a pelletizing feeding process and can be effectively used for pelletizing, and the yield of the pelletized powder is over 94 percent.

Description

technical field [0001] The invention relates to the technical field of preparation methods of granulated powders, in particular to a preparation method of yttria-stabilized zirconia granulated powders. Background technique [0002] Zirconia ceramic knives are used in modern kitchens and have advantages that metal knives cannot match, such as wear resistance, high density, and high hardness. According to reports, the wear resistance of zirconia ceramic knives is 60 times that of metal knives, and its hardness is second only to diamond, so the zirconia ceramic knives are extremely sharp after grinding. Compared with metal knives, zirconia ceramic knives are resistant to the corrosion of various acid-base organic substances, will not rust and discolor, have no metal ion dissolution, and are healthy and environmentally friendly. In addition, zirconia ceramic knives are easy to clean, can maintain the original color and taste of food, and do not have any reaction with food, redu...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/626
Inventor 陆青彭朝阳王文利孙亮李波
Owner DONGGUAN XINBO STRUCTURAL CERAMICS CO LTD
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