公开(公告)号：US10556826B2

公开(公告)日：2020-02-11

申请号：US15777422

申请日：2016-11-18

Applicant: CORNING INCORPORATED

Inventor： Jaymin Amin ,  Xiaoju Guo ,  Todd LeRoy Heck ,  Hongmei Hu ,  Yuhui Jin ,  Pascale Oram ,  Ljerka Ukrainczyk

IPC: C03C3/097 ,  C03C21/00 ,  B01J39/02 ,  B01J39/14 ,  C03C4/18

Abstract: Methods for regenerating poisoned salt bath comprising providing a salt bath comprising at least one of KNO3 and NaNO3, providing an ion-exchangeable substrate comprising lithium cations, contacting at least a portion of the ion-exchangeable substrate with the salt bath, whereby lithium cations in the salt bath diffuse from the ion-exchangeable substrate and are dissolved in the salt bath, and selectively precipitating dissolved lithium cations from the salt bath using phosphate salt. The methods further include preventing or reducing the formation of surface defects in the ion-exchangeable substrate by preventing or reducing the formation of crystals on the surface of the ion-exchangeable substrate upon removal from the salt bath.

公开(公告)号：US20180327305A1

公开(公告)日：2018-11-15

申请号：US16043442

申请日：2018-07-24

Applicant: CORNING INCORPORATED

Inventor： Jaymin Amin ,  Xiaoju Guo ,  Todd LeROY Heck ,  Hongmei Hu ,  Yuhui Jin ,  Pascale Oram ,  Ljerka Ukrainczyk

IPC: C03C21/00 ,  B01J39/14 ,  B01J39/02

CPC classification number: C03C21/002 ,  B01J39/02 ,  B01J39/14 ,  C03C3/097

Abstract: Methods for regenerating poisoned salt bath comprising providing a salt bath comprising at least one of KNO3 and NaNO3, providing an ion-exchangeable substrate comprising lithium cations, contacting at least a portion of the ion-exchangeable substrate with the salt bath, whereby lithium cations in the salt bath diffuse from the ion-exchangeable substrate and are dissolved in the salt bath, and selectively precipitating dissolved lithium cations from the salt bath using phosphate salt. The methods further include preventing or reducing the formation of surface defects in the ion-exchangeable substrate by preventing or reducing the formation of crystals on the surface of the ion-exchangeable substrate upon removal from the salt bath.