A glass microsphere, comprising: a main body, wherein the main body is solid while including a network of inter-connected pores produced from a phase separation process and thermal and chemical leaching operations, with porosity extending throughout a cross-section of the solid glass microsphere.

Provided is a small-size, inexpensive gas detection material capable of detecting aldehyde-based gas. The gas detection material includes: a porous body having pores; an alkaline compound carried inside the pores; and a gas sensing agent carried inside the pores.

Transparent and insulating materials having evacuated capsules are provided. According to an aspect of the invention, a method includes forming evacuated capsules within a solution, and dispersing and suspending the evacuated capsules within the solution such that a packing density of the evacuated capsules within the solution is greater than 30%, and a visible light transmission of the solution including the evacuated capsules is greater than 75%. According to another aspect of the invention, a layer includes a plurality of evacuated capsules distributed within a dried sol-gel. A thermal conductivity of the layer is between 0.02 W/m-K and 0.001 W/m-K, and the layer has a visible light transmission of greater than 30%.

The present invention provides a method of manufacturing a three-dimensional product having uniform mechanical properties using an SLS 3D printer including the steps of: preparing a mixed powder material by mixing resin powder and glass bubbles, wherein the specific gravity of the glass bubbles is from about 0.8 to about 1.2 times that of the resin powder; supplying the mixed powder material to the 3D printer using a roller; and selectively sintering the mixed powder material by irradiating the powder material using a laser based on 3D data of the product to be manufactured.

A hollow spherical glass particle, comprising aluminum oxide Al.sub.2O.sub.3, silicon dioxide SiO.sub.2 and at least one metal oxide, wherein the metal oxide is selected from the group consisting of alkali metal oxides and alkaline earth metal oxides, wherein the ratio of aluminum atoms to alkali metal atoms is about 1:1 and the ratio of aluminum atoms to earth alkali atoms is about 2:1, with the proviso that the hollow spherical glass particle is free of boron.

An aluminoborate composition, an alumino-borosilicate glass composition, or a mixture thereof, and solid or hollow microspheres thereof, as defined herein. Also disclosed are methods of making and using the disclosed compositions, for example, forming microspheres for use in bioactive applications, and composition extracts for use in treating or healing wounds.

A dispersion of an alkyd-containing polymer dispersed in water is used to form a waterborne coating composition; the alkyd-containing polymer being an acrylic-modified alkyd polymer, a silicone-acrylic-modified alkyd polymer, or a mixture thereof. The resulting waterborne coating composition includes about 2 to about 30% by weight of one or more thermal insulating fillers with the remainder being the alkyd-containing dispersion, such that the coating composition contains about 30 to about 80% by weight of the water and about 2 to about 50% by weight of the alkyd-containing polymer. The coating applied therefrom exhibits at least one of the following properties: a thermal conductivity that is less than 100 mW/mK; a weight retention of at least 70% after being heated up to 400 C as measured by thermogravimetric analysis (TGA) with a heating rate of 20 C/min.; or a weight loss of less than 50% up to a temperature of 470 C as measured by the TGA.

Provided is a radioactive microsphere including glass having a structure represented by a formula Ca.sub.3Si.sub.2O.sub.7 and yttrium oxide contained in the glass. The radioactive microsphere has sphericity of from 0.71 to 1, and is radioactive after being activated by neutron irradiation. A method for preparing a radioactive microsphere and a radioactive filler composition is further provided. The present disclosure can be used to treat tumor by delivering radioactive microspheres to the target tissue, and then radioactive microspheres are activated by neutrons to generate radiation. The radioactivity of microspheres disappears over time, and the microspheres were dissolved and absorbed by the bone tissue in the end.

A hollow spherical glass particle, comprising aluminum oxide Al.sub.2O.sub.3, silicon dioxide SiO.sub.2 and at least one metal oxide, wherein the metal oxide is selected from the group consisting of alkali metal oxides and alkaline earth metal oxides, wherein the ratio of aluminum atoms to alkali metal atoms is about 1:1 and the ratio of aluminum atoms to earth alkali atoms is about 2:1, with the proviso that the hollow spherical glass particle is free of boron.

A dispersion of an alkyd-containing polymer dispersed in water is used to form a waterborne coating composition; the alkyd-containing polymer being an acrylic-modified alkyd polymer, a silicone-acrylic-modified alkyd polymer, or a mixture thereof. The resulting waterborne coating composition includes about 2 to about 30% by weight of one or more thermal insulating fillers with the remainder being the alkyd-containing dispersion, such that the coating composition contains about 30 to about 80% by weight of the water and about 2 to about 50% by weight of the alkyd-containing polymer. The coating applied therefrom exhibits at least one of the following properties: a thermal conductivity that is less than 100 mW/mK; a weight retention of at least 70% after being heated up to 400 C as measured by thermogravimetric analysis (TGA) with a heating rate of 20 C/min.; or a weight loss of less than 50% up to a temperature of 470 C as measured by the TGA.