High strength aluminosilicate hollow glass microsphere and preparation method thereof

Abstract

The invention discloses a high strength aluminosilicate hollow glass microsphere and a preparation method thereof. The hollow glass microsphere is characterized by comprising the following chemical components by mass percent: 60-75% of SiO2, 10-15% of Al2O3, 10-15% of Na2O, 1-3% of CaO, 0-1% of MgO, 0.02-0.5% of S, 0-3% of R2O and 0-3% of Fe2O3, wherein R in R2O is an alkali metal except Na. The density of the hollow glass microsphere is 0.2-0.6g / cm<3>, the compressive strength is 3-130MPa, the grain size is not greater than 80mu m, the floating rate is not less than 95%, and the softening temperature is not less than 750 DEG C. The hollow glass microsphere disclosed by the invention not only can be used in the fields in which common hollow glass microspheres are applied, but also is suitable for the high temperature and high pressure fields having special requirements in which the common hollow glass microspheres can not be applied. The hollow glass microsphere can be the hollow glass microsphere solid buoyancy material used 1000m, 2000m, 4500m and below under water, the hollow glass microsphere used for cementing wells with depth beyond 6000m during oil drilling and the hollow glass microsphere used for plastic hot extrusion molding.

Description

[0001] Technical field: [0002] The purpose of the present invention is to provide a kind of aluminosilicate high-strength hollow glass microsphere, this hollow glass microsphere has ultra-high strength and high softening temperature performance, can be used in the field that current commercial hollow glass microsphere cannot apply, such as Deep sea exploration, ultra-deep well oil exploration and plastic extrusion molding, etc. Background technique: [0003] Hollow glass microspheres are hollow and tiny spherical materials containing inert gas. It is a kind of hollow particle with unique and stable performance. It is used in military, civilian and other high-tech fields such as solid buoyancy materials, petrochemicals, emulsion explosives, heat insulation and fireproof materials, invisible sound-absorbing materials, advanced insulation materials, chemical product additives, low-density ablative materials, etc. At present, there are two main products on the market, one ...

AI Technical Summary

Problems solved by technology

At present, there are two main products on the market, one is the hollow microspheres produced during the combustion of coal powder, the appearance is gray, the chemical composition is mainly silica and alumina, the composition fluctuates greatly, and the compressive strength is low; the other One is the hollow glass microspheres produced by people through industrialization, mainly borosilicate, which has low compressive strength and cannot meet the requirements of special fields

[0004]However, with the continuous development of science and technology and the continuous development of new application fields, the performance requirements of hollow glass microspheres are getting higher and higher, especially the compressive strength performance, If it is added to polymer materials to prepare low-density materials, especially solid buoyant materials, due to the low compressive strength of hollow glass microspheres, hollow glass microspheres are easy to break, resulting in insignificant addition effects and no effect; During oil drilling, some oil wells have a depth of more than 6,000 meters, or even tens of thousands of meters, and low-density cement slurry regulated by ultra-high-strength hollow glass is required for cementing. At present, it is difficult for commercial hollow glass beads to meet their use requirements, so the development of A high-strength, ultra-high-strength hollow glass microsphere will help to expand the application field of hollow glass microspheres on the one hand, and will help to improve the overall performance of composite materials with hollow glass microspheres as additives