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Organic/inorganic combined-crystal porcelain appearance structural member, and preparation method and application thereof

A structural part and inorganic technology, applied in the field of organic-inorganic composite crystal ceramic appearance structural parts and their preparation, can solve the problems of single shell color, high processing difficulty, small cutting amount, etc., to reduce manufacturing cost, improve heat dissipation effect, and facilitate The effect of size processing

Inactive Publication Date: 2018-09-11
南通通州湾新材料科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its shielding effect, traditional metal poses a huge challenge to antenna design. It will not be used in the manufacture of 5G backplanes (housings), while plastics are inherently low-strength and non-wear-resistant, which limits their use in large-size screens, ultra- In addition, with the improvement of consumer aesthetics, the traditional single metal shell and plastic backplane (shell) will also be difficult to impress consumers.
[0003] In the patent application number 201510940002.3, it is reported that the method of injection molding and sintering the zirconia powder and the binder to obtain the feed is used to prepare the mobile phone shell in the field of consumer electronics. This scheme uses ZrO 2 Ceramics have the characteristics of good hardness and high wear resistance, but the preparation of mobile phone casings also has the following disadvantages: 1) the fracture toughness of ceramics is still far lower than that of metal and plastic parts, and large-scale impact resistance such as the prepared mobile phone backplane (shell) Poor drop performance, easy to break; 2) ZrO 2 The density of ceramics is as high as 6.1g / cm 3 , the quality of the large-sized parts of the back plate of the mobile phone (housing) is heavy, which is not conducive to the development of thinner and lighter consumer electronics; 3) the color of the ceramic case is single, and if a small amount of colorant is added during the firing process, the quality of the parts will also be deteriorated. Mechanical properties, resulting in monotonous color of the ceramic (housing) backplane
[0004] On the other hand, the Mohs hardness of pure zirconia ceramics is close to 9, which is second only to diamond, resulting in low cutting volume, small amount of cutting, difficult processing and long processing time in the grinding and polishing process. Only the machining cost of zirconia ceramic back cover It accounts for 2 / 3 of the entire production cost, and the processing process is easy to break, and the yield rate is low

Method used

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  • Organic/inorganic combined-crystal porcelain appearance structural member, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation process of the 1.4-inch watch back cover

[0028]Take by weighing 2.7g ammonium stearate and add in the ball mill jar that has zirconia ball, then add 400g ethanol, then take by weighing 500g median diameter D50 and be 250nm sphericity greater than 0.9 alumina, 45g median diameter D50 is 250nm of silicon oxide with a sphericity greater than 0.95, 45.5g of silicon nitride whiskers with a diameter of 0.3-0.5um and a length of 20-2000um, respectively added to a ball mill jar, ground on a ball mill for 6 hours, and then dried in an oven Ammonium stearate modified filler was obtained.

[0029] Weigh 250g of polyphenylene sulfide and 68g of liquid crystal polymer into the internal mixer and heat up to 280°C to melt it, then add the stearic acid modified filler into the internal mixer several times, and then close the internal mixer to evacuate To -0.06MPa, banbury at 285°C for 4 hours, then cool down and discharge the material, and crush it to obtain the feed...

Embodiment 2

[0033] The preparation process of the 5-inch mobile phone shell

[0034] Weigh 35g of stearic acid and add it into a stirring mill with zirconia balls, then add 2kg of ethanol, then weigh 2kg of alumina with a median particle size D50 of 150nm and a sphericity greater than 0.85, and 0.75kg of alumina with a median particle size of D50 of 250nm Silicon oxide with a sphericity greater than 0.85, 0.75kg of alumina whiskers with a diameter of 0.3-0.5um and a long diameter of 20-2000um were slowly added to the stirring mill and stirred for 2 hours, then dried in an oven to obtain stearic acid modification. filler.

[0035] Weigh 1.5kg of polyphenylene sulfide and add it to the internal mixer and raise the temperature to 315°C to melt it, then add the stearic acid modified filler to the internal mixer several times, then close the internal mixer and evacuate to -0.06MPa at 330 After banburying at ℃ for 1 hour, the temperature is lowered and the material is crushed to obtain the fee...

Embodiment 3

[0039] The preparation process of the middle frame of 5-inch mobile phone

[0040] Weigh 18.8g of γ-aminopropyltriethoxysilane and add it to a stirring mill with zirconia balls, then add 3kg of ethanol and 0.3kg of deionized water, and then weigh 2.5kg of median particle size D50 with a sphericity greater than 200nm 0.9 alumina, 0.625kg of silica with a median particle size D50 of 200nm and a sphericity greater than 0.95, and 0.625kg of alumina whiskers with a diameter of 0.3-0.5um and a long diameter of 20-2000um and slowly add them to the stirring mill After stirring for 2 hours, dry in an oven to obtain a silane coupling agent-modified filler.

[0041] Weigh 1.3kg of polyphenylene sulfide and 1.2kg of liquid crystal polymer and add the obtained silane coupling agent modified filler into the mixer and mix evenly. Raise the temperature of the extruder to 330°C and repeat in the extruder. After being extruded 10 times, it is drawn and cut into pellets to obtain feed.

[0042...

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Abstract

The invention provides an organic / inorganic combined-crystal porcelain appearance structural member, and a preparation method and an application thereof. The combined-crystal porcelain appearance structural member includes, by weight, 40-55% of spheroid nano-alumina being more than 0.85 in sphericity degree, 5-15% of spheroid nano-silicon oxide being more than 0.85 in sphericity degree, 5-15% of nano crystal whiskers, and 30-40% of a polyphenylene sulfide high-molecular blend matrix. The structural member has the texture and optic effects of ceramic but is only 3 / 5 in density of ceramic, so that the structural member has convenience in weight design of electronic products; the surface hardness of the structural member is lower than ceramic, which is beneficial to dimensional processing. The preparation method greatly reduces manufacturing cost; in addition, by combining the nano-alumina with nano ceramic crystal whiskers, heat conductive channels are formed so as to reduce adverse deformation due to thermal stress. The structural member can be used for producing appearance structures, such as shells and middle frames of a cell phone, the middle frame of an integrated cell phone shell, and back cover and middle frame of a watch, etc.

Description

technical field [0001] The invention relates to the technical field of structural parts and their preparation, in particular to the field of preparation of consumer electronic casing structural parts, and in particular to the appearance structural parts of organic-inorganic alloy crystal porcelain and its preparation method and application. Background technique [0002] With the rapid development of consumer electronics such as mobile phones, structural parts such as backplanes (housings) of consumer electronics have made great progress, but also encountered new problems. Especially in the future 5G era, more stringent requirements are put forward for the material of consumer electronics backplane (housing). Due to its shielding effect, traditional metal poses a huge challenge to antenna design. It will not be used in the manufacture of 5G backplanes (housings), while plastics are inherently low-strength and non-wear-resistant, which limits their use in large-size screens, u...

Claims

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Application Information

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IPC IPC(8): C04B26/10H04M1/18
CPCC04B26/10C04B2201/20C04B2201/32H04M1/18C04B24/24C04B14/303C04B14/06C04B14/383
Inventor 周涛
Owner 南通通州湾新材料科技有限公司