Optimization of the quality control parameters in sapphire single crystal preparation using the Kyropoulos method

Xu, Jia; Qiao, Tiezhu; Dong, Huijie; Zhang, Haifeng; Yan, Gaowei

doi:10.1039/d2ce01675c

Cited by 1 publication

(1 citation statement)

References 21 publications

(21 reference statements)

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“…For example, the drilling efficiency of a 4 inch (inner diameter 103.5mm) sapphire bit is 5-8mm/min, and the life is not less than 10000mm. In order to achieve the above objectives, except for the high accuracy of bit, the abrasive properties of the bit matrix must be adapted to the drill ability of the sapphire material to ensure that the diamond is continuous exposure, and then ensure the high efficiency of the bit [5][6] . The diamond size directly affects the surface quality of the crystal bar.…”

Section: Introductionmentioning

confidence: 99%

Segment Matrix Design and Drilling Test of Diamond Bit for Sapphire

Xu¹,

Liu²,

Xu³

2021

MSF

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This paper introduces the characteristics of sapphire and sapphire digging bits in LED field. The segment matrix design principle of bit and the rule of diamond selection are put forward. In addition, this paper analyzes the function of different metal powders and diamond parameters in the segment matrix. The results show that the finer grained (for example 80/100 mesh) diamond should be used with the concentrations of 30-60%. In the segment matrix, tin element can make the matrix more brittle and then the bit is sharper. Copper, silver and nickel element can enhance the matrix toughness and strength, cobalt and tungsten element can increase abrasive resistance. All of the above designs enable the sapphire bit to high sharpness and long life. A 4-inch sapphire bit was prepared for drilling sapphire crystal, the efficiency is increased by 8% than the Taiwan drill bit with the same specifications, the life is equal to Taiwan's drill bit, and the defect rate of sapphire bar is less than 0.5%, which satisfies the requirement of customers.

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Section: Introductionmentioning

confidence: 99%