Month: May 2018

Precision Grinding

Precision grinding techniques include cylindrical grinding and surface grinding (also known as Blanchard or Mattison grinding). Grinding consists of using a spinning wheel made of bonded abrasive particles to remove material from the piece being worked, making it conform to specs. The grinding technician decides which grinding method is the right one for a particular part, based on the specifications and holding requirements for the piece. The technician will also choose the appropriate tool to give the surface of the piece being ground the correct shape, size and texture. Precision grinding the most suitable material: ceramic Tungsten steel High carbon steel Product advantages of the component Narrow dimension tolerance (0.002mm) High surface finish (up to 0.05 µ) High accuracy of shape Advantages of the lapping process Nearly all components are processed without clamping Apparatuses are seldomly used as the to be processed. Type of grinding: Horizontal Spindle Surface Grinding Cylindrical grinding centerless grinding internal diameter grinding creep-feed grindin Lapping LONGYI Grinding products MLCC Packing/testing Ceramic Index Table Die bonder Micro dispensing nozzle Expoxy dispensing tools Waffer processing ceramic arm/fork/finger Tungsten steel punch/clamp Dicing  chuck table Porous ceramic floating table

Zirconium Oxide

氧化鋯: 氧化鋯是一種具有非常高的抗裂紋擴展性的材料。氧化鋯陶瓷還具有非常高的熱膨脹性,因此通常是連接陶瓷和鋼的首選材料。它是所有精細陶瓷材料中最堅固和最堅固的材料,它廣泛用於製造曾經被認為不可能用陶瓷製成的剪刀和刀具。單晶氧化鋯也被認為是一顆寶石,因為它的折射率創造出類似鑽石的亮度。 氧化鋯可以加工成綠色,餅乾或完全緻密的狀態。在綠色或餅乾形式下,它可以相對容易地加工成複雜的幾何形狀。然而,使材料完全緻密化所需的燒結過程導致氧化鋯體收縮約20%。這種收縮意味著在加工氧化鋯預燒結時不可能保持非常嚴格的公差。 為了實現非常嚴格的公差,必須使用金剛石工具對完全燒結的材料進行機加工/研磨。在這個過程中,使用非常精確的金剛石塗層工具/輪子磨掉材料,直到形成所需的形狀。由於材料的繼承韌性和硬度,這可能是耗時且昂貴的過程。 與傳統陶瓷一樣堅硬而易碎,氧化鋯具有高強度,耐磨性和柔韌性,遠遠超過大多數其他技術陶瓷。氧化鋯是一種非常堅固的技術陶瓷,具有優異的硬度,斷裂韌性和耐腐蝕性能; 所有這些都沒有陶瓷最常見的特性 – 高脆性。 有幾種等級的氧化鋯,其中最常見的是氧化釔部分穩定氧化鋯(Y-PSZ)和氧化鎂部分穩定氧化鋯(Mg-PSZ)。這兩種材料都具有優異的性能,但是,操作環境和零件幾何形狀將決定哪種等級可能適合特定應用(更多內容見下文)。其獨特的抗裂紋擴展性和高熱膨脹性使其成為將陶瓷與鋼等金屬連接的優良材料。由於Zirconia的獨特性能,它有時被稱為“陶瓷鋼”。 氧化鋯是一種多功能材料,廣泛應用於金屬鑄造和牙科植入物。在室溫下,ZrO2呈現單斜晶體結構。在較高溫度下燃燒時,它會轉變為四方和立方。這會在加熱和冷卻循環期間引起破裂,在冷卻循環期間經常發生應力。當氧化鋯與少量其它類型的氧化物混合時,四方和/或立方相是穩定的。適用於此目的的氧化物包括氧化鎂(MgO),氧化釔(Y 2 O 3,氧化釔),氧化鈣(CaO)和氧化鈰(III)(Ce 2 O 3)。 氧化鋯的主要特性: 耐高磨損,化學穩定性,與鋼相似的熱膨脹係數 高強度,良好的衝擊強度,良好的抗熱震性,優異的耐熔融金屬性,良好的耐磨性。 大比重可縮短研磨時間,提高生產效率。 高強度,高硬度,不易破碎,無剝離,白度,表面光滑,無孔,易清潔,球形度好,圓度好,適用於高粘度材料,高線速度和超細要求,達到理想的研磨細度。

Aluminum Oxide

Aluminum Oxide: Aluminum Oxide is usually applied to industries such as semiconductors, solar power, optic industry. While the products mostly used as ceramic arm, ceramic ring, ceramic finger, ceramic bush, ceramic life pin, ceramic gasket. The major properties include as following: electric insulation, high temperature resistance. It possesses strong ionic inter atomic bonding giving rise to its desirable material characteristics. It can exist in several crystalline phases which all revert to the most stable hexagonal alpha phase at elevated temperatures. Aluminum Oxide is one of the most cost effective and widely used material in the family of engineering ceramics. The raw materials from which this high performance technical grade ceramic is made are readily available and reasonably priced, resulting in good value for the cost in fabricated alumina shapes. With an excellent combination of properties and an attractive price, it is no surprise that fine grain technical grade alumina has a very wide range of applications The composition of the ceramic body can be changed to enhance particular desirable material characteristics. An example would be additions of chrome oxide or manganese oxide to improve hardness and change color. Other additions can be made to improve the ease and consistency of …

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Advanced Ceramic

Heat Resistance Thermal Conductivity Electric Resistivity Micro Hardness Thermal Expansion Coefficient Flexural Strength Compressive Strength High Temperature Strength Density Fracture Toughness Poisson’s Ratio Melting Point Zirconia Oxide (ZrO2) High hardness, high density, high flexural strength, and zirconia ceramic density between 5.95-6.05g / cm3 Zirconia ceramics are inherently lubricious to avoid contamination and inconvenience caused by additional lubricants. Good insulation, no static, strong corrosion resistance, high temperature resistance and the advantage of thermal expansion coefficient close to steel. Fracture Toughness [MPa*m0.5] Zirconia Oxide|ZrO2 ■ 9.5 [MPa*m0.5] Silicon Nitride|Si3N4 ■ 7.7 [MPa*m0.5] Silicon Carbide|SiC ■ 4.6 [MPa*m0.5] Aluminium Oxide|Al2O3 ■ 3.6 [MPa*m0.5] Aluminium Nitride|AIN ■ 2.6 [MPa*m0.5] Boron Nitride|BN ■ – Thermal Expansion Coefficient [10-6/℃] Zirconia Oxide|ZrO2 ■ 10.1 [10-6/℃] Aluminium Oxide|Al2O3 ■ 8.0 [10-6/℃] Aluminium Nitride|AIN ■ 4.4 [10-6/℃] Silicon Carbide|SiC ■ 4.0 [10-6/℃] Silicon Nitride|Si3N4 ■ 2.3 [10-6/℃] Boron Nitride|BN ■ 2.0 [10-6/℃] Aluminium Oxide (Al2O3) Excellent electrical insulation (1×1014 to 1×1015 Ωcm) Medium to very high mechanical strength (300 to 630 MPa) Extremely high compressive strength (2,000 to 4,000 MPa) High hardness (15 to 19 GPa) Thermal conductivity (20 to 30 W/mK) Good grinding characteristics Electric Resistivity [Ω‧cm] Aluminium Oxide|Al2O3 ■ >10¹⁴ [Ω‧cm] Aluminium Nitride|AIN ■ >10¹⁴ [Ω‧cm] Silicon …

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