Grinding auxiliary and grinding liquid for coarse grinding of sapphire and preparation methods of grinding auxiliary and grinding liquid

Abstract

The invention discloses a grinding auxiliary and a grinding liquid for coarse grinding of sapphire and preparation methods of the grinding auxiliary and the grinding liquid. The grinding auxiliary comprises a component A and a component B in a mass ratio of the component A to the component B being 3:1-5:1, wherein the component A is prepared from ingredients in parts by weight as follows: 5-10 parts of small molecular alcohol, 10-15 parts of an organic dispersing agent and 1-2 parts of filler; the component B is prepared from ingredients in parts by weight as follows: 10-20 parts of a suspending agent, 5-10 parts of a defoaming agent, 10-30 parts of the small molecular alcohol and 10-15 parts of an antirust agent. An appropriate quantity of the component A and an appropriate quantity of the component B are taken proportionally and are stirred and mixed uniformly at the normal temperature, a mixture is diluted with deionized water to 10-20 times by weight, abrasive particles are further added, and the grinding liquid for the coarse grinding of the sapphire is prepared. The grinding liquid prepared according to the technical scheme is good in dispersing stability and cannot layer after long-term storage; the lubricating performance is good, and large scratches caused when the grinding liquid is applied to the coarse grinding of the sapphire are reduced; the filler is added to the grinding liquid, so that the temperature of the grinding process is reduced, the surface of a substrate material of the sapphire is not prone to cracking, and the fragment rate is reduced.

Description

technical field [0001] The invention relates to a grinding aid and a grinding liquid, in particular to a grinding aid and a grinding liquid for rough grinding of sapphire and a preparation method thereof. Background technique [0002] Sapphire has extremely high hardness, strength and light transmission, and it has great application potential in mobile phone flat window panels. [0003] Generally speaking, the processing technology of sapphire plane includes rough grinding, fine grinding and polishing. Among them, the first process after cutting the sapphire ingot is double-sided rough grinding, which is also a crucial step. The surface roughness of double-sided grinding, Thickness and TTV directly affect the subsequent processing quality. There are oil-based and water-based rough grinding fluids for sapphire. In general, water-based grinding fluids have a higher grinding rate than oil-based grinding fluids, but have poor lubricity and are prone to large scratches on the su...

AI Technical Summary

Problems solved by technology

There are oil-based and water-based rough grinding fluids for sapphire. In general, water-based grinding fluids have a higher grinding rate than oil-based grinding fluids, but have poor lubricity and are prone to large scratches on the surface of sapphire substrates, which increases the difficulty of grinding in subsequent processes. , at the same time, the water-based abrasive has poor heat dissipation during the grinding process, and it is easy to generate thermal stress cracks in the sapphire substrate, resulting in fragmentation; while the oil-based abrasive has a low grinding rate and poor suspension of abrasive particles, resulting in the surface of the sapphire substrate during grinding. Scratches, and the abrasive cannot be recycled

At the same time, the oily grinding fluid is not easy to clean, and it is easy to pollute the environment

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