Process for producing shaped bodies of silicon dioxide

Details Process for producing shaped bodies of silicon dioxide Process for producing shaped bodies of silicon dioxide

1997-03-11

1999-02-02

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Producing hollow article

264651, 264660, 264655, 264 86, 264 87, 65 173, 65 176, C04B 3328

Patent

active

058660623

ABSTRACT:
A shaped body of amorphous silicon dioxide, which has a chemical purity of at least 99.9% and a cristobalite content of at most 1% and which is impermeable to gas, is known. To provide shaped bodies of amorphous silicon dioxide which have a high precision, which can be small or large in size and of simple to complicated shape, which have a chemical purity of at least 99.9%, are impermeable to gas above wall thicknesses of 1 mm, which have a high cold flexural strength, low thermal conductivity and low radiation of heat, which are thermal shock resistant and can be exposed repeatedly or also long-term to temperatures in the range from 1000.degree. to 1300.degree. C. and which can be welded in a sharply delineated manner without spreading joins and which have a low spectral transmission from the ultraviolet to the middle infrared spectral region, the shaped body is opaque, contains pores, at a wall thickness of 1 mm has a direct spectral transmission which is virtually constant in the wavelength range from .lambda.=190 nm to .lambda.=2650 nm and is below 10%, and it has a density which is at least 2.15 g/cm.sup.3. A process for producing such shaped bodies is also provided.

REFERENCES:
patent: 3301635 (1967-01-01), Bergna et al.
patent: 3972704 (1976-08-01), Loxley et al.
patent: 4040795 (1977-08-01), Jung
patent: 4072489 (1978-02-01), Loxley et al.
patent: 5063003 (1991-11-01), Gonzalez-Oliver
patent: 5302364 (1994-04-01), Feinblum
patent: 5360773 (1994-11-01), Winkelbauer et al.
patent: 5585173 (1996-12-01), Kamo et al.
Keramische Zeitschrift, vol. 38, No. 8, 1986, pp. 442-445.
Quarzglas und Quarzgut, Heraeus Quarzschmelze.

Affiliated with

Also associated with

Rating

Process for producing shaped bodies of silicon dioxide does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing shaped bodies of silicon dioxide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing shaped bodies of silicon dioxide will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1114238