# US 2014/0191448 A1 · Method for manufacturing glass-ceramic composite

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0191448 A1
- Document ID: US20140191448A1
- Status: Published application
- Kind: A1
- Application number: 13/736,242
- Filed: 2013-01-08
- Published: 2014-07-10
- Earliest claimed: 2013-01-08
- Assignees: Università Di Padova; King Abdul Aziz City for Science and Technology (KACST)
- Applicants: Università Di Padova
- Inventors: Mohammed A. Binhussain; Paolo Colombo; Enrico Bernardo; Majed A. Binmajed; Mauro Marangoni; Hamad H. Atalasi; Amer M. Alajmi
- Web page: https://patentgrep.com/patent/US20140191448A1

## CPC

- C04B 41/80: of only ceramics
- C03B 19/06: by sintering, {e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction}
- C03C 1/002: {Use of waste materials, e.g. slags}
- C03C 14/004: {the non-glass component being in the form of particles or flakes}
- C03C 2214/04: Particles; Flakes
- C03C 2214/20: Glass-ceramics matrix
- C03C 2214/30: Methods of making the composites
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS

## Abstract

The invention provides a method for manufacturing a glass-ceramic composite using natural raw material and waste glasses. The invention provides a method for manufacturing a white glass-ceramic composite using waste glass and a whitening agent. The invention also provides a method for manufacturing a colored glass-ceramic composite using waste glass, the whitening agent and a coloring agent.

## Claims

### Claim 1

A method for manufacturing a glass-ceramic composite, the method comprising:
grinding a set of raw materials to fine powder, wherein the set of raw materials comprises cullet and a whitening agent;
sieving the fine powder for filtering out particles having diameter more than about 90 microns;
mixing the fine powder with a predefined amount of water to obtain a homogenous mixture;
shaping the homogenous mixture;
drying the homogenous mixture in response to shaping; and
firing the homogenous mixture at a temperature of about 750° C. to about 1100° C.

### Claim 2 (depends on 1)

The method of claim 1, wherein the cullet is soda-lime based waste glass.

### Claim 3 (depends on 1)

The method of claim 1, wherein the set of raw materials comprises about 65 wt % to about 95 wt % of cullet and about 5 wt % to about 35 wt % of the whitening agent.

### Claim 4 (depends on 1)

The method of claim 1, wherein the whitening agent comprises one of meta-kaolin, wollastonite precursor powder, calcium fluoride (CaF2) and mixture of α-quartz (SiO2) and limestone (CaCO3) in stoichiometric ratio of 1:1.

### Claim 5 (depends on 1)

The method of claim 1, wherein the set of raw material further comprises a coloring agent.

### Claim 6 (depends on 5)

The method of claim 5, wherein the coloring agent is metal silicate based coloring agent.

### Claim 7 (depends on 5)

The method of claim 5, wherein the set raw materials comprises about 65 wt % to about 95 wt % of cullet, about 5 wt % to about 33 wt % of the whitening agent and 2 wt % to 7 wt % of the coloring agent.

### Claim 8 (depends on 1)

The method of claim 1, wherein the homogenous mixture is dried at a temperature of about 80° C. for a period of about 8 hours to about 10 hours.

### Claim 9 (depends on 1)

The method of claim 1, wherein the homogenous mixture is shaped using one of uniaxially cold pressing, biaxial cold pressing, dry pressing, semi-dry pressing, compacting, cold isostatic pressing, hot pressing, extrusion molding, injection molding, compression molding, gel casting, slip casting and tape casting.

### Claim 10 (depends on 1)

The method of claim 1, wherein the homogenous mixture is fired at a temperature of about 750° C. to about 1100° C. with a rate of about 5° C. per minute to about 50° C. per minute for a period of about 15 minutes to about 1 hour.