Ceramic mobile-phone rear cover and preparation method thereof
A mobile phone back cover and ceramic technology, which is applied in the field of high-toughness ceramic mobile phone back cover and its preparation, can solve the problems of complex molding process, low toughness and strength, and failure to meet the fracture toughness of the mobile phone back cover, and achieve high dimensional accuracy.
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[0041]The invention provides a preparation method of a ceramic mobile phone back cover, comprising:
[0042] (1) The yttria-stabilized zirconia powder is prepared into a suspension with a solvent, a dispersant is added to the suspension, and an alumina powder is added, uniformly mixed and then dried to obtain a doping-modified oxide Yttrium stabilized zirconia powder;
[0043] The alumina powder is prepared into a suspension with a solvent, a dispersant is added to the suspension, a sintering aid is added, and the mixture is uniformly mixed and dried to obtain a doped and modified alumina powder;
[0044] The back cover of the ceramic mobile phone can use zirconia powder as the main raw material, or alumina powder as the main raw material. When the back cover of the ceramic mobile phone uses zirconia powder as the main raw material, its raw material formula in parts by weight is as follows:
[0045]
[0046] The zirconia powder and alumina powder are made of sub-micron pow...
Example Embodiment
[0074] Implementation Case 1
[0075] (1) Formula
[0076]
[0077] (2) Preparation method
[0078] (1) Preparation of doped modified high-purity zirconia powder
[0079] Weigh the yttria-stabilized high-purity zirconia powder, use deionized water as a solvent, prepare the yttria-stabilized high-purity zirconia powder into a suspension with a solid content of 45%, add BYK to the above suspension to disperse agent, with Al(NO 3 ) 3 .6H 2 Add Al by way of O 2 O 3 . Then, using ZrO 2 50kg of balls was used as a ball milling medium, and it was ball-milled in a ball-milling tank for 12 hours. After mixing uniformly, it was spray-dried to obtain doped and modified high-purity zirconia powder.
[0080] (2) Normal pressure and low temperature sintering
[0081] The modified zirconia powder obtained in step (1) was placed in a dry pressing mold, and formed by dry pressing at 30 MPa, and then placed in a cold isostatic pressing machine, and the pressure was maintained at 15...
Example Embodiment
[0086] Implementation case 2
[0087] (1) Formula
[0088]
[0089] (2) Preparation method
[0090] (1) Preparation of doped modified high-purity zirconia powder
[0091] Weigh the yttria-stabilized high-purity zirconia powder, use deionized water as a solvent, prepare the yttria-stabilized high-purity zirconia powder into a suspension with a solid content of 50%, add BYK to the above suspension to disperse agent, with Al(NO 3 ) 3 .6H 2 Add Al by way of O 2 O 3 . Then, using ZrO 2 50kg of balls was used as a ball milling medium, and it was ball-milled in a ball-milling tank for 12 hours. After mixing uniformly, it was spray-dried to obtain doped and modified high-purity zirconia powder.
[0092] (2) Normal pressure and low temperature sintering
[0093] The modified zirconia powder obtained in step (1) was placed in a dry pressing mold, and formed by dry pressing at 30 MPa, and then placed in a cold isostatic pressing machine, and the pressure was maintained at 15...
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