Frits for use in vacuum insulating glass (VIG) units, and/or associated methods
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C03C-008/24
C03C-008/22
C03C-008/04
E06B-003/66
E06B-003/677
C03C-003/062
C03C-003/066
C03C-003/12
C03C-003/14
C03C-008/02
C03C-008/14
출원번호
US-0172432
(2014-02-04)
등록번호
US-9988302
(2018-06-05)
발명자
/ 주소
Hogan, John P.
Dennis, Timothy Alan
Petrmichl, Rudolph Hugo
Kemenah, Greg
출원인 / 주소
Guardian Glass, LLC
대리인 / 주소
Nixon & Vanderhye P.C.
인용정보
피인용 횟수 :
2인용 특허 :
64
초록▼
Certain example embodiments of this invention relate to vacuum insulating glass (VIG) units having improved seals made using two different frit-based edge seal materials, and/or methods of making the same. In certain example embodiments, a first frit material is applied around peripheral edges of fi
Certain example embodiments of this invention relate to vacuum insulating glass (VIG) units having improved seals made using two different frit-based edge seal materials, and/or methods of making the same. In certain example embodiments, a first frit material is applied around peripheral edges of first and second glass substrates. The first frit material, which may be bismuth-based in certain example embodiments, is fired with a heat treatment (e.g., thermal tempering) process. A second frit material, which may be VBZ-based in certain example embodiments, is applied and at least partially overlaps with the fired first frit material. The first frit material acts as a primer, and the second frit material helps seal together the VIG unit. The second frit material is fired at a significantly lower temperature that enables the glass to retain the temper or other strength imparted by the heat treatment.
대표청구항▼
1. A method of making a vacuum insulating glass (VIG) window unit, the method comprising: sealing together first and second glass substrates using first and second different frit materials in making the VIG window unit, so that the first and second frit materials are used in forming at least an edge
1. A method of making a vacuum insulating glass (VIG) window unit, the method comprising: sealing together first and second glass substrates using first and second different frit materials in making the VIG window unit, so that the first and second frit materials are used in forming at least an edge seal for the vacuum insulating glass (VIG) window unit;wherein the first frit material is a primer and fused to at least one of the glass substrates during a thermal tempering process when the glass reaches a first temperature of at least 550 degrees C.;wherein the first frit material comprises, by weight, 70-80 wt. % bismuth oxide, 2-7 wt. % zinc oxide, 5-15 wt. % silicon oxide, 2-7 wt. % aluminum oxide, 0-5% magnesium oxide, 0-5% chromium oxide, 0-5% iron oxide, 0-5% cobalt oxide, 0-5% sodium oxide, 0-5% manganese oxide, and 0-5% barium oxide;wherein the first frit material is a bismuth oxide based frit material, and the second frit material is a vanadium oxide based frit material, these being the largest components of the first and second frit materials, respectively,wherein the second frit material comprises vanadium oxide, barium oxide, and zinc oxide, in amounts that total at least 65% by weight, wherein vanadium oxide, barium oxide and zinc oxide are the three largest components of the second frit material, the second frit forming a bond with the first frit material in making the edge seal for the VIG window unit and being melted during a second heating process, subsequent to the thermal tempering process, when the glass reaches at a second temperature of no more than 400 degrees C., with the first frit material being wettable at the second temperature, so that the first and second glass substrates are hermetically sealed together using the first frit as a primer frit and the second frit as a sealing frit. 2. The method of claim 1, wherein the second frit material comprises 45-67 wt. % vanadium oxide, 7-25 wt. % barium oxide, and 4-17 wt. % zinc oxide. 3. The method of claim 2, wherein the second frit material further comprises 0-13 wt. % tellurium oxide, 0-13 wt. % molybdenum oxide, 0-13 wt. % tantalum oxide, and 0-13 wt. % niobium oxide, and wherein at least one of the tellurium oxide, molybdenum oxide, tantalum oxide, and niobium oxide is provided at at least 0.25 wt. %. 4. The method of claim 1, wherein the first and/or second frit material(s) comprise(s) coefficient of thermal expansion (CTE) filler material, the CTE filler material lowering the CTE thereof when introduced therein. 5. The method of claim 1, wherein the first and second frit materials are lead free. 6. The method of claim 1, wherein the first and second frit materials contain less than 1 ppm lead. 7. The method of claim 1, wherein the first frit material and second frit material are also used in forming a seal between a pump-out tube of the VIG unit and one of the substrates. 8. The method of claim 1, wherein the first and/or second frit material(s) comprise(s) coefficient of thermal expansion (CTE) filler material, the CTE filler material lowering the CTE thereof when introduced therein, and wherein the CTE filter material has a CTE causes the frit material in which it is included to have a CTE within 10% of a CTE of the glass substrates. 9. The method of claim 1, wherein the CTE filler material comprises Mo. 10. The method of claim 1, wherein the second frit comprises from 0.25-13% oxide of niobium (wt. %).
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