公开(公告)号：US20200319124A1

公开(公告)日：2020-10-08

申请号：US16910227

申请日：2020-06-24

Applicant: AGC Inc.

Inventor： Kazuya Sasaki ,  Masaaki Takata

IPC: G01N25/16 ,  G01N29/07 ,  G01N29/11 ,  G01J3/44 ,  G01K5/66 ,  C03C3/078

Abstract: The present invention relates to a method for evaluating the thermal expansion properties of a titania-containing glass body. On the basis of measured values, obtained at a certain temperature, for a physical parameter that changes depending on the titania concentration and a physical parameter that changes depending on the fictive temperature, the thermal expansion coefficient of the titania-containing silica glass body and the slope of the thermal expansion coefficient are calculated using a linear relational expression represented by a plurality of physical properties. The thermal expansion properties of the titania-containing silica glass body are evaluated on the basis of the calculated thermal expansion coefficient and thermal expansion coefficient slope.

公开(公告)号：US11912617B2

公开(公告)日：2024-02-27

申请号：US16860107

申请日：2020-04-28

Applicant: AGC Inc.

Inventor： Nobutaka Kidera ,  Kazuya Sasaki ,  Yasutomi Iwahashi

IPC: C03C3/06 ,  C03C4/16 ,  H01P1/208 ,  H01P3/12 ,  H04B1/40

CPC classification number: C03C3/06 ,  C03C4/16 ,  H01P1/2088 ,  H01P3/121 ,  C03C2201/23 ,  C03C2204/00 ,  H04B1/40

Abstract: A silica glass for a radio-frequency device has an OH group concentration being less than or equal to 300 wtppm; an FQ value being higher than or equal to 90,000 GHz at a frequency of higher than or equal to 25 GHz and lower than or equal to 30 GHz; and a slope being greater than or equal to 1,000 in a case where the FQ value is approximated as a linear function of the frequency in a frequency band of higher than or equal to 20 GHz and lower than or equal to 100 GHz.

公开(公告)号：US11555796B2

公开(公告)日：2023-01-17

申请号：US16910227

申请日：2020-06-24

Applicant: AGC Inc.

Inventor： Kazuya Sasaki ,  Masaaki Takata

IPC: G01N25/16 ,  C03C3/078 ,  G01J3/44 ,  G01K5/66 ,  G01N29/07 ,  G01N29/11 ,  G01N21/47

Abstract: The present invention relates to a method for evaluating the thermal expansion properties of a titania-containing glass body. On the basis of measured values, obtained at a certain temperature, for a physical parameter that changes depending on the titania concentration and a physical parameter that changes depending on the fictive temperature, the thermal expansion coefficient of the titania-containing silica glass body and the slope of the thermal expansion coefficient are calculated using a linear relational expression represented by a plurality of physical properties. The thermal expansion properties of the titania-containing silica glass body are evaluated on the basis of the calculated thermal expansion coefficient and thermal expansion coefficient slope.